EVALUATION KIT AVAILABLE
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MAX77860
USB Type-C, 3A Switch-Mode Buck Charger
with Integrated CC Detection, Reverse Boost,
and ADC
General Description
Benefits and Features
The MAX77860 is a high-performance single input switch
mode charger that features USB Type-C CC detection capability in addition to reverse boost capability and a Safeout LDO.
● Single-Cell Switch Mode Charger
• Up to 14V Protection
• 4.0V to 13.5V Input Operating Range
• Switching Charger with D+/D- Charger Detection
• Up to 4.0A Input Current Limit with Adaptive Input
Current Limit (AICL)
• Up to 3.15A Battery Charging Current Limit
• Optional External Sense Resistor
• CC, CV, and Die Temperature Control
• Supports USB-OTG Reverse Boost, up to 1.5A
Current Limit
• Master-Slave Charging Capability, up to 6A Charge
Current
• Integrated Battery True-Disconnect FET
• Rated up to 9ARMS, Discharge Current Limit
(Programmable)
This switched-mode battery charger with two integrated
switches, provides small inductor and capacitor sizes, programmable battery charging current, and is ideally suited
for portable devices such as smartphones, IoT devices,
and other Li-ion battery powered electronics. The charger
features a single input, which works for both USB and high
voltage adapters. It supports USB Type-C CC detection
under BC 1.2 specification, and the power-path switch is
integrated in the chip. All MAX77860 blocks connected to
the adapter/USB pin are protected from input overvoltage
events up to 14V. The USB-OTG output provides trueload disconnect and is protected by an adjustable output
current limit. It has an input current limit up to 4.0A and
can charge a single-cell battery up to 3.15A. When configured in reverse-boost mode, the IC requires no additional
inductors to power USB-OTG accessories. The switching
charger is designed with a special CC, CV, and die temperature regulation algorithm, as well as I2C programmable settings to accommodate a wide range of battery sizes
and system loads. The on-chip ADC can help monitor the
charging input voltage/current, battery voltage, charging/
discharging current, and the battery temperature.
The MAX77860 communicates through an I2C 3.0 compatible serial interface consisting of a bidirectional serial
data line (SDA) and a serial clock line (SCL). The IC is
available in a 3.9mm x 4.0mm, 81-bump (9 x 9 array),
0.4mm pitch, wafer-level package (WLP).
Applications
●
●
●
●
USB Type-C Charging for 1S Li-ion Applications
Mobile Point-of-Sale Devices
Portable Medical Equipment
Portable Industrial Equipment
19-100290; Rev 2; 6/19
● USB Type-C Detection
• Integrated VCONN Switch
• CC Pin
• D+/D- Detection for USB HVDCP
• BC 1.2 Support
● One Safeout LDO
● I2C-Compatible Interface
Ordering Information appears at end of data sheet.
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Simplified Block Diagram
MAX77860
UP TO 4.0A
CHGIN 16V
WITHSTANDING
2.2µF
VBUSDET
INOKB
VCONNIN
DP
DN
CC1
CC2
BYP
ISENSE,
AND OTG
SWITCH,
COMPARATOR
TYPE-C
CC
ADAPTOR
DETECTION
OVPENB
2x10µF
3.15A
SWITCHING
CHARGER
AND
REVERSE
BOOST
0.47µH
SYS
2x10µF
DETBATB
REF
AND
BIAS
ADC
VIO
SCL
SDA
INTB
ONKEY
SWI1
SWI2
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I²C
SERIAL
PORT
AND
REGISTERS
AND
CONTROL
SAFEOUT
LDO
LI-ION
BATTERY
4.9V TO USB PHY
1µF
Maxim Integrated | 2
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
TABLE OF CONTENTS
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Benefits and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Simplified Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
81-WLP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Characteristics—Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Electrical Characteristics—SAFEOUT LDO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Electrical Characteristics—SAR ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Electrical Characteristics—USB Type-C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Typical Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
MAX77860 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Functional Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Switching Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
USB Data Contact Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
DP and DN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Adapter Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Charging Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
External Input OVP Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Input Current Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Input-Voltage Regulation Loop and Adaptive Input Current Limit (AICL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Battery Detect Input Pin (MDETBATB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Charge States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Dead-Battery Prequalification State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Fast-Charge Constant Current State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Topoff State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Done State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Timer Fault State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Watchdog Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Thermal Shutdown State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Main Battery Differential Voltage Sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
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Maxim Integrated | 3
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
TABLE OF CONTENTS (CONTINUED)
OTG Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Master-Slave Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
S-Wire I Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
S-Wire Interrupt (Slave Fault Detection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Programming the SLAVE Charging Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
ONKEY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Main Battery Overcurrent Protection Due to Fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
SAFEOUT LDO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
On-Chip ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
USB Type-C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Benefits and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Register Layout Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Register Map and Detailed Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Top Level I2C Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Charger Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Charger Register Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Register Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Interrupt, Mask, Okay, and Detail Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
USB Type-C Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Master Slave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Typical Application Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
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Maxim Integrated | 4
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
LIST OF FIGURES
Figure 1. Charging Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 2. DETBATB Internal Circuitry and System Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 3. Charger State Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 4. Li+/Li-Poly Charge Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 5. Battery Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 6. Battery-Boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 7. Battery-Boost (OTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 8. No Charge-Buck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 9. Charge-Buck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 10. Thermal Shutdown Regions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 11. Schematic with Parasitic Capacitances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 12. S-Wire Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 13. SW1 and SW2 Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 14. ONKEY Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 15. Overcurrent Protection Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
www.maximintegrated.com
Maxim Integrated | 5
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
LIST OF TABLES
Table 1. Supported Adapter Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 2. Top Level Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 3. Functional Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 4. PMIC Register (0x20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 5. Interrupt Source (0x22) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 6. Interrupt Source Mask (0x23) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 7. SYSTEM Interrupt (0x24) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 8. SYSTEM Interrupt Source Mask (0x26) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 9. SAFEOUT Control Register (0xC6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 10. Charger Interrupt (0xB0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 11. Charger Interrupt Mask (0xB1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 12. Charger Status (0xB2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 13. Charger Details 00 (0xB3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 14. Charger Details 01 (0xB4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 15. Charger Details 02 (0xB5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 16. Charger Configuration 00 (0xB7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Table 17. Charger Configuration 01 (0xB8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Table 18. Charger Configuration 02 (0xB9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 19. Charger Configuration 03 (0xBA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 20. Charger Configuration 04 (0xBB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 21. Charger Configuration 05 (0xBC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 22. Charger Configuration 06 (0xBD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Table 23. Charger Configuration 07 (0xBE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Table 24. Charger Configuration 09 (0xC0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 25. Charger Configuration 10 (0xC1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 26. Charger Configuration 11 (0xC2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Table 27. Charger Configuration 12 (0xC3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Table 28. BC_INT (0x00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Table 29. CC_INT (0x01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 30. BC_INTMASK (0x02) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 31. CC_INTMASK (0x03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 32. BC_STATUS1 (0x04) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Table 33. BC_STATUS2 (0x05) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Table 34. CC_STATUS1 (0x06) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Table 35. CC_STATUS2 (0x07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Table 36. BC_CTRL1 (0x08) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Table 37. BC_CTRL2 (0x09) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Table 38. CC_CTRL1 (0x0A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
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Maxim Integrated | 6
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
LIST OF TABLES (CONTINUED)
Table 39. CC_CTRL2 (0x0B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Table 40. CC_CTRL3 (0x0C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Table 41. CHGIN_ILIM1 (0x0D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Table 42. CHGIN_ILIM2 (0x0E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Table 43. S-Wire Interrupt (0x80) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Table 44. S-Wire Interrupt Mask (0x81) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Table 45. Slave Charger 1 CC (0x82) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Table 46. Slave Charger 2 CC (0x83) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Table 47. S-Wire 1 Readback (0x84) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Table 48. S-Wire 2 Readback (0x85) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Table 49. S-Wire Status (0x86) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Table 50. ADC_CONFIG1 (0x50) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Table 51. ADC_CONFIG2 (0x51) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Table 52. ADC_CONFIG3 (0x52) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Table 53. ADC_DATA_CH0 (0x53) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Table 54. ADC_DATA_CH1 (0x54) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Table 55. ADC_DATA_CH2 (0x55) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Table 56. ADC_DATA_CH3 (0x56) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Table 57. ADC_DATA_CH4 (0x57) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Table 58. ADC_DATA_CH5 (0x58) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Table 59. ADC_DATA_CH6 (0x59) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Table 60. ADC_DATA_CH7 (0x5A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Table 61. ADC_OFFSET_CH1 (0x5B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Table 62. ADC_OFFSET_CH3 (0x5C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Table 63. ADC_OFFSET_CH4 (0X5D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
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Maxim Integrated | 7
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Absolute Maximum Ratings
Operating Junction Temperature (TJ) Range ....... -40°C to +85°C
Junction Temperature (TJ) Range ...................... -40°C to +150°C
Storage Temperature Range .............................. -40°C to +150°C
Soldering Temperature (reflow) ........................................ +260°C
Switching Charger
CHGIN to GND ..................................................... -0.3V to 16V
BYP to GND .......................................................... -0.3V to 16V
PVL to GND ............................................................ -0.3V to 6V
AVL to GND ............................................................ -0.3V to 6V
BAT_SP to GND ......... -0.3V, BATT - 0.3V to 6V, BATT + 0.3V
BATT to GND .......................................................... -0.3V to 6V
SYS to GND ............................................................ -0.3V to 6V
DETBATB to GND ......................................-0.3V to VIO + 0.3V
VBUSDET to GND .................................................. -0.3V to 20V
OVPENB to GND ...................................... -0.3V to AVL + 0.3V
BST to PVL ........................................................... -0.3V to 16V
BST to CHGLX ....................................................... -0.3V to 6V
INOKB to GND .......................................... -0.3V to SYS + 0.3V
BAT_SN to GND .................................................. -0.3V to 0.3V
CHGPG to GND ................................................... -0.3V to 0.3V
CHGLX Continuous Current ....................................... 3.5ARMS
CHGPG Continuous Current ...................................... 3.5ARMS
SYS Continuous Current ............................................ 4.5ARMS
BATT Continuous Current .......................................... 4.5ARMS
CHGIN Continuous Current ........................................... 3ARMS
BYP Continuous Current ............................................... 3ARMS
CSP to GND ............... -0.3V, BATT - 0.3V to 6V, BATT + 0.3V
CSN to GND ............... -0.3V, BATT - 0.3V to 6V, BATT + 0.3V
SLAVE to GND ..................................... -0.3V to SYS_A + 0.3V
ONKEY to GND .......................................-0.3V to BATT + 0.3V
SWI1 to GND........................................ -0.3V to SYS_A + 0.3V
SWI2 to GND........................................ -0.3V to SYS_A + 0.3V
CHGIND to GND ....................................... -0.3V to AVL + 0.3V
Safeout LDO
SAFEOUT to GND ......................... -0.3V to 6V, CHGIN + 0.3V
USB Type-C
DP, DN to GND ....................................-0.3V to VCCINT + 0.3V
CC1, CC2 to GND ................................-0.3V to VCCINT + 0.3V
VCONNIN to GND .................................-0.3V to VCCINT + 0.3V
VCONNBTEN_SYS to GND ....................................... -0.3V to 6V
ADC
THMB, THM to GND ...............................-0.3V to BATT + 0.3V
I2C and Interface Logic
VIO to GND .............................................................. -0.3V to 6V
SDA, SCL to GND ...................................... -0.3V to VIO + 0.3V
SYS_A, SYS_Q to GND .......................................... -0.3V to 6V
INTB ..................................................... -0.3V to SYS_A + 0.3V
TEST_, VCCTEST to GND ....................................... -0.3V to 6V
GND_ to GND ...................................................... -0.3V to 0.3V
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the
device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
Package Information
81-WLP
Package Code
W813C3+1
Outline Number
21-0775
Land Pattern Number
Refer to Application Note 1891
Thermal Resistance, Four-Layer Board:
Junction to Ambient (θJA)
49°C/W
Junction to Case (θJC)
N/A
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates
RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal
considerations, refer to www.maximintegrated.com/thermal-tutorial.
www.maximintegrated.com
Maxim Integrated | 8
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics
(VSYS = +3.6V, VCHGIN = 0V, VIO = 1.8V, TA = -40°C to +85°C, typical value for TA is +25°C. Limits are 100% tested at TA = +25°C.
Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. Typical
values are not guaranteed.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
All circuits off, BATT = 3.6V
25
50
µA
USB Type-C on, all other circuits off,
BATT = 3.6V
90
150
µA
SUPPLY CURRENT
Shutdown Supply
Current (BATT)
No Load Supply Current
(BATT)
ISHDN
INL
SYS INPUT RANGE
SYS Undervoltage
Lockout Threshold
VSYS_UVLO
VBATT falling, 200mV hysteresis
2.4
2.5
2.6
V
SYS Overvoltage
Lockout Threshold
VSYS_OVLO
VBATT rising, 200mV hysteresis
5.2
5.36
5.52
V
Low SYS Thresholds
Range programmable through LSDAC
register, VSYS falling, production tested
at 3.60V setting
3.6
V
Low SYS Hysteresis
Range programmable through LSHYST
register, production tested at 100mV
setting
100
mV
TJ rising
165
°C
Thermal Shutdown
Hysteresis
15
°C
Thermal Interrupt 1
120
°C
Thermal Interrupt 2
140
°C
THERMAL SHUTDOWN
Thermal Shutdown
Threshold
TSHDN
LOGIC AND CONTROL INPUTS
SCL, SDA Input Low
Level
TA = +25°C
SCL, SDA Input High
Level
TA = +25°C
SCL, SDA Input
Hysteresis
TA = +25°C
SCL, SDA Logic Input
Current
VIO = 3.6V
SCL, SDA Input
Capacitance
(Note 1)
SDA Output Low
Voltage
Sinking 20mA
0.4
V
Output Low Voltage
(INTB)
ISINK = 1mA
0.4
V
Output High Leakage
(INTB)
Interrupt Debounce
Filter Timer
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VSYS = 5.5V, TA = +25°C
0.3 x VIO
0.7 x VIO
V
0.05 x
VIO
-10
V
+10
10
-1
V
0
VSYS = 5.5V, TA = +85°C
0.1
LOWSYS
16
µA
pF
+1
μA
ms
Maxim Integrated | 9
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics (continued)
(VSYS = +3.6V, VCHGIN = 0V, VIO = 1.8V, TA = -40°C to +85°C, typical value for TA is +25°C. Limits are 100% tested at TA = +25°C.
Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. Typical
values are not guaranteed.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
1000
kHz
I2C-COMPATIBLE INTERFACE TIMING FOR STANDARD, FAST, AND FAST-MODE PLUS (Note 1)
Clock Frequency
Hold Time (Repeated)
START Condition
fSCL
tHD;STA
0.26
µs
CLK Low Period
tLOW
0.5
µs
CLK High Period
tHIGH
0.26
µs
Setup Time Repeated
START Condition
tSU;STA
0.26
µs
DATA Hold Time
tHD:DAT
0
µs
DATA Valid Time
tVD:DAT
0.45
µs
DATA Valid
Acknowledge Time
tVD:ACK
0.45
µs
DATA Setup time
tSU;DAT
50
ns
Setup Time for STOP
Condition
tSU;STO
0.26
µs
tBUF
0.5
µs
Bus-Free Time Between
START and STOP
Pulse Width of Spikes
that must be
Suppressed by the Input
Filter
(Note 1)
50
ns
I2C-COMPATIBLE INTERFACE TIMING FOR HS-MODE (CB = 100pF) (Note 1)
Clock Frequency
Hold Time (Repeated)
START Condition
fSCL
CB = 100pF
3.4
MHz
tHD;STA
160
ns
CLK Low Period
tLOW
160
ns
CLK High Period
tHIGH
60
ns
Setup Time Repeated
START Condition
tSU;STA
160
ns
DATA Hold Time
tHD:DAT
0
ns
DATA Setup time
tSU;DAT
10
ns
Setup Time for STOP
Condition
tSU;STO
160
ns
Pulse Width of Spikes
that must be
Suppressed by the Input
Filter
(Note 1)
10
ns
I2C-COMPATIBLE INTERFACE TIMING FOR HS-MODE (CB = 400pF) (Note 1)
Clock Frequency
Hold Time (Repeated)
START Condition
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fSCL
tHD;STA
CB = 400pF
1.7
160
MHz
ns
Maxim Integrated | 10
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics (continued)
(VSYS = +3.6V, VCHGIN = 0V, VIO = 1.8V, TA = -40°C to +85°C, typical value for TA is +25°C. Limits are 100% tested at TA = +25°C.
Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. Typical
values are not guaranteed.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CLK Low Period
tLOW
320
ns
CLK High Period
tHIGH
120
ns
Setup Time Repeated
START Condition
tSU;STA
160
ns
DATA Hold Time
tHD:DAT
0
ns
DATA Setup time
tSU;DAT
10
ns
Setup Time for STOP
Condition
tSU;STO
160
ns
Pulse Width of Spikes
that must be
Suppressed by the Input
Filter
(Note 1)
10
ns
Note 1: Design guidance only, not tested during final test.
Note 2: The CHGIN input must be less than VOVLO and greater than both VCHGIN_UVLO and VCHGIN2SYS for the charger to turn on.
Note 3: The input voltage regulation loop decreases the input current to regulate the input voltage at VCHGIN_REG. If the input current
is decreased to ICHGIN_REG_OFF and the input voltage is below VCHGIN_REG, then the charger input is turned off.
Note 4: Production tested in charger DC-DC low-power mode (CHG_LPM bit = ‘1).
Note 5: Production tested to ¼ of the threshold with LPM bit = ‘1 (¼ FET configuration).
Electrical Characteristics—Charger
(VCHGIN = 5V, VBATT = 4.2V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Fast-charge current
is set for 1.5A. Done current is set for 150mA. Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
VOVLO
V
CHGIN INPUT
Operating Voltage
CHGIN Overvoltage
Threshold (Note 2)
CHGIN Overvoltage
Threshold Hysteresis
CHGIN Overvoltage
Delay (Note 1)
www.maximintegrated.com
3.2
VCHGIN-OVLO
VCHGIN Rising; CHGIN_OVP = 00
13.4
13.7
14
VCHGIN Rising; CHGIN_OVP = 01
9.9
10.2
10.5
VCHGIN Rising; CHGIN_OVP = 10
7.8
8
8.3
VCHGIN Rising; CHGIN_OVP = 11
5.65
5.85
6.05
VCHGIN Falling; CHGIN_OVP = 00
300
VCHGIN H-
VCHGIN Falling; CHGIN_OVP = 01
350
OVLO
VCHGIN Falling; CHGIN_OVP = 10
250
VCHGIN Falling; CHGIN_OVP = 11
300
VCHGIN rising, 100mV overdrive, not
production tested
10
VCHGIN falling, 100mV overdrive, not
production tested
20
TD-OVLO
V
mV
μs
Maxim Integrated | 11
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—Charger (continued)
(VCHGIN = 5V, VBATT = 4.2V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Fast-charge current
is set for 1.5A. Done current is set for 150mA. Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.)
PARAMETER
VBUSDET to GND
Minimum Turn-On
Threshold Range (Note
2)
VBUSDET to GND
Minimum Turn-On
Threshold Accuracy
VBUSDET to SYS
Minimum Turn-On
Threshold (Note 2)
VBUSDET Turn-On
Threshold Delay
SYMBOL
VVBUSDET_UV
LO
VVBUSDET_UV
LO
VVBUSDET2SY
S
TD-UVLO
CONDITIONS
MIN
4.5
4.6
V
VSYS +
0.12
VSYS +
0.20
VSYS +
0.28
V
VVBUSDET rising, 50mV hysteresis, when
valid CHGIN input is detected
Not production tested
10
CHGIN Adaptive
Voltage Regulation
Threshold Accuracy
VCHGIN_REG
4.8V setting
4.7
Programmable, 500mA default,
production tested at 500mA, 1800mA,
4000mA settings only
0.1
www.maximintegrated.com
IINLIMIT
V
4.4
4.2
VCHGIN Input Current
Limit
5.1
VVBUSDET rising, 4.5V setting
Programmable at 4.2V, 4.6V, 4.7V, and
4.8V (Note 3)
IIN
UNITS
4.5
VCHGIN_REG
CHGIN Supply Current
MAX
VVBUSDET rising, 200mV hysteresis,
programmable at 4.5V, 4.9V, 5.0V, and
5.1V (Note 2)
CHGIN Adaptive
Current Regulation
Threshold Range (Note
3)
CHGIN Current Limit
Range
TYP
4.8
μs
4.8
V
4.9
V
4
A
mA
VCHGIN = 2.4V, the input is undervoltage
and RINSD is the only loading,
CHGIN_PD_FST = 0 (default)
0.075
VCHGIN = 5.0V, charger disabled,
CHGIN_PD_FST = 0 (default)
0.17
0.5
VCHGIN = 5.0V, charger enabled, VSYS =
VBATT = 4.5V (no switching, battery
charged), CHGIN_PD_FST = 0 (default)
2.7
4
VCHGIN = 5.0V, charger enabled, VBATT
= 3.8V, 500mA input current setting, TA =
+25°C
462.5
487.5
500
VCHGIN = 5.0V, charger enabled, VBATT
= 3.8V, 1800mA input current setting, TA
= +25°C
1710
1755
1800
VCHGIN = 5.0V, charger enabled, VBATT
= 3.8V, 1800mA input current setting, TA
= 0°C to +85°C
1667
1755
1843
VCHGIN = 5.0V, charger enabled, VBATT
= 3.8V, 4000mA input current setting, TA
= +25°C
3800
3900
4000
VCHGIN = 5.0V, charger enabled, VBATT
= 3.8V, 4000mA input current setting, TA
= 0°C to +85°C
3705
3900
4095
mA
Maxim Integrated | 12
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—Charger (continued)
(VCHGIN = 5V, VBATT = 4.2V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Fast-charge current
is set for 1.5A. Done current is set for 150mA. Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.)
PARAMETER
SYMBOL
CHGIN Self-Discharge
Down to UVLO Time
tINSD
CHGIN Input SelfDischarge Resistance
RINSD
CHGINOK to Start
Switching
Tstart
CONDITIONS
MIN
TYP
Time required for the charger input to
cause a 10µF input capacitor to decay
from 6.0V to 4.3V, CHGIN_PD_FST = 0
(default)
100
CHGIN_PD_FST = 0 (default)
35
CHGIN_PD_FST = 1
7.3
MAX
UNITS
ms
kΩ
26
ms
SWITCH IMPEDANCES AND LEAKAGE CURRENTS
CHGIN to BYP
Resistance
RIN2BYP
Bidirectional
0.0144
0.04
Ω
CHGLX High-Side
Resistance
RHS
0.0327
0.1
Ω
CHGLX Low-Side
Resistance
RLS
0.0543
0.14
Ω
RBAT2SYS
0.0128
0.04
Ω
BATT to SYS Dropout
Resistance
CHGIN to BATT
Dropout Resistance
CHGLX Leakage
Current
BST Leakage Current
BYP Leakage Current
SYS Leakage Current
www.maximintegrated.com
RIN2BAT
Calculation estimates a 0.04Ω inductor
resistance (RL)
0.0999
Ω
RIN2BAT = RIN2BYP + RHS + RL +
RBAT2SYS
CHGLX = CHGPG or BYP, TA = +25°C
0.01
CHGLX = CHGPG or BYP, TA = +85°C
1
BST = 5.5V, TA = +25°C
0.01
BST = 5.5V, TA = +85°C
1
VBYP = 5.5V, VCHGIN = 0V, VCHGLX =
0V, charger disabled, TA = +25°C
0.01
VBYP = 5.5V, VCHGIN = 0V, VCHGLX =
0V, charger disabled, TA = +85°C
1
10
10
µA
µA
10
µA
VSYS = 0V, VBATT = 4.2V, charger
disabled, TA = +25°C
0.01
VSYS = 0V, VBATT = 4.2V, charger
disabled, TA = +85°C
1
10
µA
Maxim Integrated | 13
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—Charger (continued)
(VCHGIN = 5V, VBATT = 4.2V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Fast-charge current
is set for 1.5A. Done current is set for 150mA. Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.)
PARAMETER
SYMBOL
IMBAT
BATT Quiescent Current
(ISYS = 0A, IBYP = 0A )
IMBDN
IMBAT
CONDITIONS
MIN
TYP
MAX
VCHGIN = 0V, VSYS = 0V, VBATT = 4.2V,
external QBAT is off, TA = +25°C
20
30
VCHGIN = 0V, VSYS = 0V, VBATT = 4.2V,
external QBAT is off, TA = +85°C
20
VCHGIN = 0V, VBATT = 4.2V, external
QBAT is on, main battery overcurrent
protection disabled, TA = +25°C
15.3
VCHGIN = 0V, VBATT = 4.2V, external
QBAT is on, main battery overcurrent
protection enabled, TA = +25°C
20
VCHGIN = 0V, VBATT = 4.2V, external
QBAT is on, main battery overcurrent
protection enabled, TA = +85°C
20
VSYS = 4.2V, VBATT = 0V, charger
disabled, TA = +25°C
0.01
VSYS = 4.2V, VBATT = 0V, charger
disabled, TA = +85°C
1
VCHGIN = 5V, VBATT = 4.2V, QBAT is off,
main battery overcurrent protection
disabled, charger enabled (done mode),
TA = +25°C
3
VCHGIN = 5V, VBATT = 4.2V, QBAT is off,
main battery overcurrent protection
disabled, charger enabled (done mode),
TA = +85°C
3
VCHGIN = 0V, VBATT = 4.2V, external
QBAT is on, main battery overcurrent
protection disabled, TA = +85°C
10
UNITS
µA
10
15.3
CHARGER DC-DC BUCK
Minimum ON Time
tON-MIN
75
ns
Minimum OFF Time
tOFF
75
ns
www.maximintegrated.com
Maxim Integrated | 14
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—Charger (continued)
(VCHGIN = 5V, VBATT = 4.2V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Fast-charge current
is set for 1.5A. Done current is set for 150mA. Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.)
PARAMETER
Current Limit (Note 5)
SYMBOL
ILIM
CONDITIONS
MIN
TYP
MAX
TA = 0°C to +85°C, IND = '0 (0.47µH
inductor option), production tested at ILIM
= 00 setting, ILIM = 00 (3.00A out) (Note
4)
4.15
5.05
5.95
TA = 0°C to +85°C, IND = '0 (0.47µH
inductor option), production tested at ILIM
= 00 setting, ILIM = 01 (2.75A out) (Note
4)
4.75
TA = 0°C to +85°C, IND = '0 (0.47µH
inductor option), production tested at ILIM
= 00 setting, ILIM = 10 (2.50A out) (Note
4)
4.45
TA = 0°C to +85°C, IND = '0 (0.47µH
inductor option), production tested at ILIM
= 00 setting, ILIM = 11 (2.25A out) (Note
4)
4.15
TA = 0°C to +85°C, IND = '1 (1.0µH
inductor option), production tested at ILIM
= 11 setting, ILIM = 00 (3.00A out) (Note
4)
4.6
TA = 0°C to +85°C, IND = '1 (1.0µH
inductor option), production tested at ILIM
= 11 setting, ILIM = 01 (2.75A out) (Note
4)
4.3
TA = 0°C to +85°C, IND = '1 (1.0µH
inductor option), production tested at ILIM
= 11 setting, ILIM = 10 (2.50A out) (Note
4)
4
TA = 0°C to +85°C, IND = '1 (1.0µH
inductor option), production tested at ILIM
= 11 setting, ILIM = 11 (2.25A out) (Note
4)
UNITS
A
3
3.7
4.4
REVERSE BOOST
BYP Voltage Adjustment
Range
Reverse Boost
Quiescent Current
IBYP
Reverse Boost
Converter Maximum
Output Current
Reverse Boost BYP
Voltage in OTG Mode
www.maximintegrated.com
2.6V/VBATT < 4.5V, adjustable from 3V to
5.5V, min
3
2.6V/VBATT < 4.5V, adjustable from 3V to
5.5V, max
5.5
Not switching: output forced 200mV
above its target regulation voltage
3.6V < VBATT < 4.5V
VBYP.OTG
V
5.1V setting
1150
µA
2
4.94
A
5.1
5.26
V
Maxim Integrated | 15
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—Charger (continued)
(VCHGIN = 5V, VBATT = 4.2V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Fast-charge current
is set for 1.5A. Done current is set for 150mA. Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.)
PARAMETER
CHGIN Output Current
Limit
SYMBOL
ICHGIN.OTG.LI
M
Reverse Boost Output
Voltage Ripple (Note 1)
CONDITIONS
MIN
TYP
MAX
3.4V < VBATT < 4.5V, TA = +25°C,
OTG_ILIM = 00
500
550
3.4V, TA = +25°C, OTG_ILIM = 01 (Note
1)
900
990
3.4V, TA = +25°C, OTG_ILIM = 10 (Note
1)
1200
1320
3.4V < VBATT < 4.5V, TA = +25°C,
OTG_ILIM = 11
1500
1650
UNITS
mA
Discontinuous inductor current (i.e., skip
mode)
±150
Continuous inductor current
±150
mV
CHARGER
BATT Regulation
Voltage Range
VBATTREG
BATT Regulation
Voltage Accuracy
Fast-Charge Current
Program Range
Fast-Charge Current
Accuracy
Fast-Charge Currents
IFC
Programmable in 12.5mV steps (4 bits),
production tested at 4.2V and 4.5V only
4.2
4.5
4.2V and 4.5V settings, TA = +25°C
-0.75
+0.75
4.2V and 4.5V settings, TA = 0°C to
+85°C
-1
+1
100mA to 3.15A in 50mA steps,
production tested at 500mA and 3000mA
settings
0.1
3.15
Programmed currents ≥ 500mA, VBATT >
VSYSMIN (short mode), production tested
at 500mA and 3000mA settings, TA =
+25°C
-4
+4
Programmed currents ≥ 500mA, VBATT >
VSYSMIN (short mode), production tested
at 500mA and 3000mA settings, TA = 0°C
to +85°C
-5
+5
Programmed currents ≥ 500mA, VBATT <
VSYSMIN (LDO mode), production tested
at 800mA
-10
+10
TA = +25°C, VBATT > VSYSMIN,
programmed for 3.0A
2880
3000
3120
TA = +25°C, VBATT > VSYSMIN,
programmed for 0.5A
480
500
520
V
%
A
%
mA
Low-Battery
Prequalification
Threshold
VPQLB
VBATT rising
2.8
2.9
3
V
Dead-Battery
Prequalification
Threshold
VPQDB
VBATT rising
1.9
2
2.1
V
Prequalification
Threshold Hysteresis
VPQ-H
Applies to both VPQLB and VPQDB
www.maximintegrated.com
100
mV
Maxim Integrated | 16
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—Charger (continued)
(VCHGIN = 5V, VBATT = 4.2V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Fast-charge current
is set for 1.5A. Done current is set for 150mA. Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.)
PARAMETER
SYMBOL
Low-Battery
Prequalification Charge
Current Program Range
IPQLB_RANGE
Low-Battery
Prequalification Charge
Current
IPQLB
CONDITIONS
Default setting = enabled (50mA)
Charger Restart
Threshold Range
50
50
I_PREQUAL= 01
100
I_PREQUAL = 10
200
IPQDB
VRSTRT
TYP
I_PREQUAL = 00 (default)
I_PREQUAL = 11
Dead-Battery
Prequalification Charge
Current
MIN
Adjustable, 100, 150, and 200, it can also
be disabled
Charger Restart
Deglitch Time
10mV overdrive, 100ns rise time
Topoff Current Program
Range
Programmable from 100mA to 350mA in
8 steps
Topoff Current Accuracy
- Gain (Note 1)
Topoff Current Accuracy
- Offset (Note 1)
MAX
UNITS
400
mA
mA
300
400
500
40
55
80
mA
100
150
200
mV
130
100
ms
350
mA
Gain
5
%
Offset
20
mA
Charge Termination
Deglitch Time
tTERM
2mV overdrive, 100ns rise/fall time
30
ms
Charger State Change
Interrupt Deglitch Time
tSCIDG
Excludes transition to timer fault state,
watchdog timer state
30
ms
Charger Soft-Start Time
tSS
(Note 1)
1.5
ms
IBATT = 10mA
30
IBATT = 1A
60
Load regulation during the reverse
regulation mode
30
BATT TO SYS FET DRIVER
BATT to SYS Reverse
Regulation Voltage
VBSREG
MINSYS Voltage
Accuracy
VSYSMIN
Programmable from 3.4V to 3.7V in
100mV steps, VBATT = 2.8V, tested at
3.4V, 3.6V, and 3.7V settings
The maximum system voltage: VSYSMAX
= VBATREG + RBAT2SYS x IBATT
Maximum SYS Voltage
VSYSMAX
-3
mV
mV/A
+3
4.245
4.32
VBATREG = 4.2V, IBATT = 3.0A
The maximum system voltage: VSYSMAX
= VBATREG + RBAT2SYS x IBATT
%
V
4.745
4.82
VBATREG = 4.7V, IBATT = 3.0A
www.maximintegrated.com
Maxim Integrated | 17
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—Charger (continued)
(VCHGIN = 5V, VBATT = 4.2V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Fast-charge current
is set for 1.5A. Done current is set for 150mA. Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
WATCHDOG TIMER
Watchdog Timer Period
tWD
80
Watchdog Timer
Accuracy
-20
s
0
+20
%
CHARGE TIMER
Prequalification Time
tPQ
Applies to both low-battery
prequalification and dead-battery
prequalification modes
35
min
Fast-Charge Constant
Current + Fast-Charge
Constant Voltage Time
tFC
Adjustable from 4 hrs to 16 hrs in two
hour steps including a disable setting
8
hrs
Topoff Time
tTO
Adjustable from 0 min to 70 min in 10 min
steps
30
min
Timer Accuracy
-20
+20
%
AVL FILTER
Internal AVL Filter
Resistance
12.5
Ω
THERMAL FOLDBACK
Junction Temperature
Thermal Regulation
Loop Setpoint Program
Range
Thermal Regulation
Gain
TJREG
Junction temperature when charge
current is reduced, programmable from
+85°C to +130°C in +5°C steps, default
value is +115°C
ATJREG
The charge current is decreased 6.7% of
the fast-charge current setting for every
degree that the junction temperature
exceeds the thermal regulation
temperature. This slope ensures that the
full-scale current of 3.0A is reduced to 0A
by the time the junction temperature is
+20°C above the programmed loop set
point. For lower programmed charge
currents such as 500mA, this slope is
valid for charge current reductions down
to 100mA; below 100mA the slope
becomes shallower but the charge
current still reduced to 0A if the junction
temperature is +20°C above the
programmed loop set point
85
130
-150
°C
mA/°C
BATTERY OVERCURRENT PROTECTION
Programmable Battery
Overcurrent Threshold
Alarm
www.maximintegrated.com
IBOVCR
Overcurrent from BATT to SYS sensed
through internal QBAT FET
3
9
A
Programmable range from 3A to 9A in
0.5A/step, default to 4.5A
Maxim Integrated | 18
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—Charger (continued)
(VCHGIN = 5V, VBATT = 4.2V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Fast-charge current
is set for 1.5A. Done current is set for 150mA. Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.)
PARAMETER
Battery Overcurrent
Debounce Time
SYMBOL
CONDITIONS
tBOVRC
This is the response time for generating
the overcurrent interrupt flag
tBOVRC2
This is the response time from
overcurrent interrupt flag to QBAT turn off
Battery Overcurrent
Protection Quiescent
Current
IBOVRC
System Power-Up
Current
ISYSPU
System Power-Up
Voltage
VSYSPU
VSYS rising, 100mV hysteresis
System Power-Up
Response Time
tSYSPU
Time required for circuit to activate from
an unpowered state (i.e., main battery hot
insertion)
MIN
TYP
MAX
3
6
10
UNITS
ms
12
(3 +
IBATT)/2
2000
μA
35
50
80
mA
1.9
2.1
2.2
V
1
μs
BATT Self-Discharge
Resistor
600
Ω
SYS Self-Discharge
Resistor
600
Ω
Self-Discharge Latch
Time
300
ms
0.8 x VIO
V
SYSTEM SELF-DISCHARGE WITH NO POWER
DETBATB, INOKB
DETBATB Logic
Threshold
Logic Input Leakage
Current
VIH
4% Hysteresis
IDETBATB
Output Low Leakage
(INOKB)
0.1
ISINK = 1mA
VSYS = 5.5V, TA = +25°C
Output High Leakage
(INOKB)
-1
VSYS = 5.5V, TA = +85°C
0
1
µA
0.4
V
+1
0.1
µA
THERMISTOR MONITOR (The thresholds are calculated for R25 = 10kΩ and β = 3435k)
T1: THM Threshold,
Cold, No Charge (0°C)
T1
VTHM/VSYS rising, 2% hysteresis
(thermistor temperature falling), default
OTP option
71.68
74.18
76.68
%
T1: THM Threshold,
Cold, No Charge (-7°C)
T1
VTHM/VSYS rising, 2% hysteresis
(thermistor temperature falling), OTP
programmable for -7°C (Note 1)
77.51
80.01
82.51
%
THM Leakage Current
VTHM = VSYS or 0V, TA = +25°C
-0.2
0.01
+0.2
µA
T4: THM Threshold,
Hot, No Charge (+60°C)
VTHM/VSYS falling, 2% hysteresis
(thermistor temperature rising)
20.44
22.94
25.44
%
www.maximintegrated.com
T4
Maxim Integrated | 19
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—Charger (continued)
(VCHGIN = 5V, VBATT = 4.2V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Fast-charge current
is set for 1.5A. Done current is set for 150mA. Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
0.4
V
OVPDRV INPUT FET
OVPENB Logic Output
Low Threshold
VOL,OVPENB
ISINK = 200µA, VOVPENB = GND
OVPENB Logic Output
High Threshold
VOH,OVPENB
ISOURCE = 200µA, VOVPENB = VAVL =
VBATT = 3.6V
0.7 x
VAVL
V
CHARGER INDICATOR (GPIO)
Output Low Voltage
ISINK = 10mA
VSYS = 5.5V; TA = +25°C
Output High Leakage
0.4
-1
VSYS = 5.5V; TA = +85°C
0
+1
0.1
V
µA
ONKEY
ONKEY Input Leakage
Current
ONKEY IL
ONKEY Rising
Threshold
VONKEYR
ONKEY Falling
Threshold
VONKEYF
ONKEY Debounce
Timer
ONKEY TDEB
0V < VONKEY < 5.5V, TA = +25°C
-1
+1
0.3 x
VBAT
V
0.7 x
VBAT
From ONKEY press to buck-on and QBAT
switch ON
µA
800
V
msecs
MASTER-SLAVE CHARGING
SWI Output High
Voltage
VOH
ISINK = 100µA
SWI Output Low Voltage
VOL
ISOURCE = 100µA
SWI Rising Time
TR
(Note 1)
200
ns
SWI Falling Time
TF
(Note 1)
200
ns
SWI Input Frequency
VSYS 0.4
V
0.4
V
FSWI
Inferred to scan test
250
kHz
SWI Turn-On Detection
Time
Twait_int
Inferred to scan test
200
μs
SWI Turn-Off Detection
Time
Toff_dly
Inferred to scan test
50
SWI High Time
TsH
Inferred to scan test
5
SWI Low Time
TsL
Inferred to scan test
5
Tstop
Inferred to scan test
100
SWI Signal Stop
Indicate Time
SWI Interrupt Trigger
Current
ISWI_FAULT
TA = +25°C
SLAVE Input Low Level
VIL
VSYS = 3.6V; TA = +25°C
SLAVE Input High Level
VIH
VSYS = 3.6V; TA = +25°C
www.maximintegrated.com
0.7 x
VSYS
90
μs
8
12
μs
8
12
μs
μs
200
µA
0.3 x
VSYS
V
V
Maxim Integrated | 20
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—Charger (continued)
(VCHGIN = 5V, VBATT = 4.2V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Fast-charge current
is set for 1.5A. Done current is set for 150mA. Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and
relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.)
PARAMETER
SYMBOL
CONDITIONS
SLAVE Input Hysteresis
VIHYS
VSYS = 3.6V; TA = +25°C
SLAVE Input Leakage
Current
ISLAVE
TA = +25°C
MIN
TYP
MAX
0.05 x
VSYS
-1
0
UNITS
V
+1
µA
Electrical Characteristics—SAFEOUT LDO
(VCHGIN = 5V, VBATT = 3.8V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Limits are 100%
tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and
characterization. Typical values are not guaranteed.)
PARAMETER
SYMBOL
Output Voltage (Default
ON)
CONDITIONS
5.0V < VCHGIN < 5.5V, IOUT = 10mA,
SAFEOUT = 01 (default)
Output Voltage
PSRR (Note 1)
MIN
TYP
MAX
UNITS
4.65
4.9
5.15
V
SAFEOUT = 00
4.85
SAFEOUT = 10
4.95
SAFEOUT = 11
3.3
VCHGIN = 5.5, F = 100kHz, COUT = 1μF
60
Maximum Output
Current
V
dB
60
Output Current Limit
mA
150
mA
Dropout Voltage
VCHGIN = 5V, IOUT = 60mA
120
mV
Load Regulation
VCHGIN = 5.5V, 30µA < IOUT < 30mA
50
mV
Quiescent Supply
Current
Not production tested
72
µA
Output Capacitor for
Stable Operation
(Note1)
0µA < IOUT < 30mA, MAX ESR = 50mΩ
1
µF
Minimum Output
Capacitor for Stable
Operation (Note 1)
0µA < IOUT < 30mA, MAX ESR = 50mΩ
0.7
µF
1200
Ω
0.7
Internal Off-Discharge
Resistance
Electrical Characteristics—SAR ADC
(VCHGIN = 5V, VBATT = 3.6V, VSYS = 3.6V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Limits
are 100% tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by
design and characterization. Typical values are not guaranteed.)
PARAMETER
CSP Input Leakage
Current
www.maximintegrated.com
SYMBOL
ICSP
CONDITIONS
TA = +25°C
MIN
TYP
MAX
UNITS
-1
0
+1
µA
Maxim Integrated | 21
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—SAR ADC (continued)
(VCHGIN = 5V, VBATT = 3.6V, VSYS = 3.6V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Limits
are 100% tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by
design and characterization. Typical values are not guaranteed.)
PARAMETER
CSN Input Leakage
Current
ADC Resolution
VBUS Voltage Range
VBUS Voltage
Measurement Accuracy
VBUS Voltage Range
VBUS Voltage
Measurement Accuracy
VBUS Current Range
VBUS Current
Measurement Accuracy
VBATT Voltage Range
VBATT Voltage
Measurement Accuracy
VBATT Current Range
VBATT Current
Measurement Accuracy
IREXT Current Range
IREXT Current
Measurement Accuracy
Temperature Sensing
Range
SYMBOL
MIN
TYP
MAX
UNITS
TA = +25°C
-1
0
+1
µA
VBUS_RANGE
VBUS_HV_RANGE = 0
2.7
VBUS_RES
VBUS_HV_RANGE = 0
VBUS_RANGE
VBUS_HV_RANGE = 1
VBUS_RES
VBUS_HV_RANGE = 1
ICSN
CONDITIONS
RES
8
IVBUS_RANGE
14
6.3
VBATT_RES
IVBATT_RES
3.1
-10
IREXT_RES
In terms of (THMB/THMV)
+10
Temperature Sensing
Measurement Accuracy
TEMP_RES
In terms of (THMB/THMV)
THMB Output Drive
VOH_THMB
IOH_THMB = -0.5mA
THMB Precharge Time
tPRE_THMB
THMB Operating Range
VTHMB
20
A
mA
80
0.24
%
%
VSYS 0.1
V
12.7
2.8
THMB = 5V
A
mA
78
TEMP_RANG
E
V
mV
12
IREXT_RANGE
IIN_THMV
4.9
0
E
A
mA
11
IVBATT_RANG
IIN_THMB
4.1
2.1
V
mV
16
VBATT_RANGE
THMV Input Leakage
14.7
0
V
mV
33
IVBUS_RES
THMB Input Leakage
Bits
6.3
ms
VSYS
V
-1
0
+1
µA
-1
0
+1
µA
Electrical Characteristics—USB Type-C
(VCHGIN = 5V, VBATT = 3.8V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Limits are 100%
tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and
characterization. Typical values are not guaranteed.)
PARAMETER
SYMBOL
VSYS Voltage
VSYS
VBUS Voltage
VBUS
www.maximintegrated.com
CONDITIONS
MIN
TYP
2.45
5
MAX
UNITS
5.5
V
20
V
Maxim Integrated | 22
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—USB Type-C (continued)
(VCHGIN = 5V, VBATT = 3.8V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Limits are 100%
tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and
characterization. Typical values are not guaranteed.)
PARAMETER
VCCINT Voltage
SYMBOL
VCCINT
CONDITIONS
MIN
TYP
MAX
VBUS present
3.6
5.5
No VBUS
2.45
5.5
UNITS
V
VREF Voltage
VREF
1.24375
1.25
1.25625
V
Oscillator Frequency
FOSC
44
50
56
kHz
COMN1/COMP2 Load
Resistor
RUSB
Load resistor on COMN1/COMP2
3
6.1
12
MΩ
IDCD Supply Voltage
Range
VDCD
IDCD enabled and 300kΩ load on DP
4.5
V
2
pF
4.5
V
3.6
All internal resources disconnected—idle
state
DP/DN Capacitance
DP/DN Max Operating
Voltage
VDPDNMAX
OVDX Comparator
Rising Threshold
VOVDX_THR
Rising COMN1/COMP2 threshold with
respect to VCC1
0
120
mV
OVDX Comparator
Falling Threshold
VOVDX_THF
Falling COMN1/COMP2 threshold with
respect to VCC1
-40
+80
mV
Accurate over ILOAD = 0 to 200µA
0.5
0.6
0.7
V
Accurate over ILOAD = 0 to 200µA
0.5
0.6
0.7
V
Tested at zero load and at 200µA load
2.6
3.4
V
VDP_SRC Voltage
VDN_SRC Voltage
VD33 Voltage
VDAT_REF Voltage
VLGC Voltage
IDM_SINK Current
IDP_SRC Current
RDM_DWN Resistor
VDP_SRC/VSR
C06
VDN_SRC/VSR
C06
VDP/DM_3p3
VSRC/VSRC33
VDAT_REF
0.25
0.32
0.4
V
VLGC
1.62
1.7
1.9
V
Accurate over 0.15V to 3.6V
55
80
105
µA
Accurate over 0V to 2.5V
7
10
13
µA
14.25
20
24
kΩ
0.01
0.1
0.5
µA
IDM_SINK/IDAT
SINK
IDP_SRC/IDCD
RDM_DWN/RD
WN15
IWEAK Current
IWEAK
VBUS31 Threshold
VBUS31
DP and DN pins, threshold in percent of
VBUS voltage 3V < VBUS < 5.5V
26
31
36
%
VBUS47 Threshold
VBUS47
DP and DN pins, threshold in percent of
VBUS voltage 3V < VBUS < 5.5V
43.3
47
51.7
%
VBUS64 Threshold
VBUS64
DP and DN pins, threshold in percent of
VBUS voltage 3V < VBUS < 5.5V
57
64
71
%
Charger Detection
Debounce
tCDDeb
45
50
55
ms
tPDSDWait
27
35
39
ms
Primary to Secondary
Timer
www.maximintegrated.com
Maxim Integrated | 23
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—USB Type-C (continued)
(VCHGIN = 5V, VBATT = 3.8V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Limits are 100%
tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and
characterization. Typical values are not guaranteed.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Proprietary Charger
Debounce
tPRDeb
5
7.5
10
ms
Data Contact Detect
Timeout
tDCDtmo
700
800
900
ms
BC 1.2 State Timeout
tTMO
180
200
220
ms
tOVDxDeb
90
100
110
µs
DP/DN Overvoltage
Debounce
VBUS Supply Current
Consumption 12V
IVBUS
Note: Min may need to be adjusted by
resistance of VCONN internal switch at
1W load, for VCONNIN Min > 4.9V
VCONN Source
Requirements
VCONN Bulk
Capacitance
VSYS = 0V, VBUS = 12V, CC1/CC2 open,
CC detection enabled, CCDRPPhase =
00b
CVCONN
Must be on VCONN source
185
µA
4.75
5.5
V
10
220
µF
5.5
V
CC Pin Operational
Voltage Range
CC Pin Voltage in DFP
3.0A Mode
VCC_PIN
Measured at CC pins with 126kΩ load,
IDFP3.0_CC enable, and VCCINT ≥ 3.65V
3.1
V
CC Pin voltage in DFP
1.5A Mode
VCC_PIN
Measured at CC pins with 126kΩ load,
IDFP1.5_CC enable, and VCCINT ≥ 2.45V
1.85
V
CC Pin Clamp
Requirements
60µA ≤ ICC_ ≤ 600µA
1.1
1.32
V
-10%
5.1K
+10%
Ω
CC UFP Pulldown
Resistance
RDUFP_CC_
CC DFP 0.5A Current
Source
IDFP0.5_CC_
0.25V ≤ CC pin voltage ≤ 1.5V
-10%
80
+10%
µA
CC DFP 1.5A Current
Source
IDFP1.5_CC_
0.45V ≤ CC pin voltage ≤ 1.5V
-8%
180
+8%
µA
CC DFP 3.0A Current
Source
IDFP3.0_CC_
0.85V ≤ CC pin voltage ≤ 2.45V
-8%
330
+8%
µA
CC RA RD Threshold
VRA_RD0.5
0.15
0.2
0.25
V
CC RA RD Hysteresis
VRA_RD0.5_H
0.0
0.03
V
CC UFP 0.5A RD
Threshold
VUFP_RD0.5
0.61
0.7
V
CC UFP 0.5A RD
Hysteresis
VUFP_RD0.5_H
0.0
0.03
V
CC UFP 1.5A RD
Threshold
VUFP_RD1.5
1.16
1.31
V
CC UFP 1.5A RD
Hysteresis
VUFP_RD1.5_H
0.0
0.03
V
www.maximintegrated.com
0.66
1.23
Maxim Integrated | 24
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—USB Type-C (continued)
(VCHGIN = 5V, VBATT = 3.8V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Limits are 100%
tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and
characterization. Typical values are not guaranteed.)
PARAMETER
CC VCONN Detect
Threshold
CC VCONN Detect
Hysteresis
CC DFP VOPEN Detect
Threshold
SYMBOL
VVCONN_DET
MIN
TYP
MAX
UNITS
2.10
2.25
2.4
V
VVCONN_DET
0.015
_H
VDFP_VOPEN
CC DFP VOPEN Detect
Hysteresis
VDFP_VOPEN_
CC DFP VOPEN with
3.0A Detect Threshold
VDFP_VOPEN3
CC DFP VOPEN with
3.0A Detect Hysteresis
VDFP_VOPEN3
VBUS Valid
CONDITIONS
1.50
A_H
VBDET
VCCINT ≥ 3.5V
2.45
VCCINT ≥ 3.5V
0.0
Rising
3.8
2.6
4.12
VBDET_h
Falling hysteresis
VBUS Discharge Value
Threshold
VSAFE0V
Falling voltage level where a connected
UFP finds VBUS removed
VBUS Discharge Value
Hysteresis
VSAFE0V_h
Rising hysteresis
CC Pin Power-Up Time
tClampSwap
Max time allowed from removal of voltage
clamp till 5.1k resistor attached
Type-C CC Pin
Detection Debounce
tCCDebounce
Type-C Debounce
tPDDebounce
10
Type-C Quick Debounce
tQDebounce
0.9
1
VBUS Debounce
1.65
0.015
H
A
1.575
V
V
2.75
V
0.03
V
4.4
0.7
0.6
0.77
0.82
100
100
V
V
V
mV
15
ms
200
ms
20
ms
1.1
ms
tVBDeb
9
10
11
ms
VSAFE0V Debounce
tVSAFE0VDeb
9
10
11
ms
Type-C Error Recovery
Delay
tErrorRecovery
25
tDRP
50
100
ms
30
70
%
Time a role swap from DFP to UFP or
reverse is completed
1
ms
Type-C DRP Toggle
Time
Duty Cycle of DRP
Swap
Duty cycle of swap of UFP to DFP roles
ms
DRP Transition Time
tDRPTransition
VCONN Enable Time
tVCONNON
Time from when VBUS is supplied in DFP
mode in state Attach.DFP.DRPWait
2
ms
VCONN Disable Time
tVCONNOFF
Time from UFP detached or as directed
by I2C command until VCONN is removed
35
ms
tSINKADJ
Time from CC pin changes state in UFP
mode till current drawn from DFP reaches
new value
60
ms
CC Pin Current Change
Time
www.maximintegrated.com
Maxim Integrated | 25
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Electrical Characteristics—USB Type-C (continued)
(VCHGIN = 5V, VBATT = 3.8V, TA = -40°C to +85°C unless otherwise specified, typical values are for TA = +25°C. Limits are 100%
tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and
characterization. Typical values are not guaranteed.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
VBUS On time
tVBUSON
Time from UFP is attached till VBUS on,
for reference only
275
ms
VBUS Off Time
tVBUSOFF
Time from UFP is deteched till VBUS
reaches VSAFE0V, for reference only
650
ms
BVCEN Output Low
Voltage
ISINK = 1mA
BVCEN Output High
Voltage
ISOURCE = 1mA
0.4
V
VSYS 0.4
V
GENERAL
VBUS Supply Current
Consumption 12V CC
Detection Disabled
VBUS Supply Current
Consumption 5V
VBUS Supply Current
Consumption 5V CC
Detection Disabled
SYS Power Supply
Current
SYS Power Supply
Current CC Detection
Disabled
SYS Power Supply
Current 5V
SYS Power Supply
Current CC Detection
Disabled 5V
SYS Power Supply
Current 3V
SYS Power Supply
Current CC Detection
Disabled 3V
VSYS = 0V, VBUS = 12V, CC1/CC2 open,
CC detection disabled, CCDRPPhase =
00b
183
µA
VSYS = 0V, VBUS = 5V, CC1/CC2 open,
CC detection enabled, CCDRPPhase =
00b
131
µA
VSYS = 0V, VBUS = 5V, CC1/CC2 open,
CC detection disabled, CCDRPPhase =
00b
120
μA
VBUS = 0V, VSYS = 4.2V, CC1/CC2
open, CC detection enabled,
CCDRPPhase = 00b
45.3
µA
VBUS = 0V, VSYS = 4.2V, CC1/CC2
open, CC detection disabled,
CCDRPPhase = 00b
7.2
µA
Iccsys5v
VBUS = 0V, VSYS = 5V, CC1/CC2 open,
CC detection enabled, CCDRPPhase =
00b
49
µA
Iccsys5v_detdis
VBUS = 0V, VSYS = 5V, CC1/CC2 open,
CC detection disabled, CCDRPPhase =
00b
10.4
µA
Iccsys3v
VBUS = 0V, VSYS = 3V, CC1/CC2 open,
CC detection enabled, CCDRPPhase =
00b
40.7
µA
Iccsys3v_detdis
VBUS = 0V, VSYS = 3V, CC1/CC2 open,
CC detection disabled, CCDRPPhase =
00b
4
µA
IVBUS5V
IVBUS5V_detdi
s
ICCSYS
Iccsys4v2_detdi
s
CC DETECTION
VCONN On Resistance
CC Pin Clamp
Requirements (5.5V)
www.maximintegrated.com
RVCONN_ON
200mA load, VCONNIN = 4.9V
0.4
0.75
Ω
ICC_ ≤ 2mA
5.25
5.5
V
Maxim Integrated | 26
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Typical Operating Characteristics
(TA = +25 to +50°C, unless otherwise noted.)
www.maximintegrated.com
Maxim Integrated | 27
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Pin Configuration
MAX77860
TOP VIEW
(BUMP SIDE DOWN)
MAX77860
1
2
3
4
5
6
7
8
9
A
GND_A
THMB
GND_A
CC2
VCONNIN
CC1
DN
DP
GND_A
B
THM
ONKEY
CSP
VCONNBTEN_SYS
SLAVE
TEST4
TEST3
TEST2
VCCTEST
C
BATT
BATT
CSN
GND_D
SWI1
SWI2
CHGIND
GND_Q
TEST1
D
BATT
BATT
GND_A
GND_A
GND_A
SYS_Q
VBUSDET
INTB
SYS_A
E
SYS
SYS
SYS
BAT_SP
GND_A
INOKB
DETBATB
VIO
SCL
F
SYS
SYS
BAT_SN
GND_A
AVL
OVPENB
NC1
NC2
SDA
G
CHGPG
CHGRGSUB
BST
PVL
BYP
BYP
NC3
NC4
NC5
H
CHGPG
CHGLX
CHGLX
BYP
CHGIN
CHGIN
NC6
NC7
NC8
J
CHGPG
CHGLX
CHGLX
BYP
CHGIN
CHGIN
SAFEOUT
GND_D2
GND_A
+
WLP
(81 BUMP 9X9 ARRAY 0.4mm PITCH)
N/C PINS ARE UNCONNECTED AND CAN BE CONNECTED AT BOARD-LEVEL IF NEEDED.
ALL TEST PINS (TEST 1-4 AND VCCTEST) SHOULD BE GROUNDED IN THE END-USE APPLICATION.
*TOP VIEW = WAFER BACK-SIDE VIEW (BUMPS NOT VIEWABLE)
www.maximintegrated.com
Maxim Integrated | 28
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Pin Description
PIN
NAME
FUNCTION
D6
SYS_Q
Quiet SYS Input
D9
SYS_A
Analog SYS Input
A1, A3, A9,
D3, D4, D5,
E5, F4, J9
GND_A
Analog Ground. Short to GND_D, GND_D2 and GND_Q.
C4
GND_D
C8
REF SUPPLY
TYPE
Power
2
Power
GND
GND
Digital Ground Connection. Short to GND_D2, GND_A, and
GND_Q.
1
GND
GND_Q
Quiet Ground Connection. Short to GND_A, GND_Q,
GND_D, and GND_D2.
1
GND
J8
GND_D2
Digital Ground Connection. Short to GND_D, GND_A, and
GND_Q.
E1, E2, E3,
F1, F2
SYS
System Power Connection. Connect system loads to this
node. Bypass with 2 x 10µF/10V ceramic capacitors from
SYS to CHGPG ground plane.
H5, H6, J5, J6
CHGIN
High Current Charger Input. Bypass to CHGPG with a 2.2µF/
25V ceramic capacitor. It also serves as the reverse boost
output.
G5, G6, H4, J4
BYP
CHGIN Bypass Pin. This pin can see up to OVP limit. Output
of adapter input current limit block and input to switching
charger. BYP is also the boost converter output when the
charger is operating in 'reverse boost' mode. Bypass with 2 x
10µF/25V ceramic capacitors from BYP to CHGPG ground
plane.
H2, H3, J2, J3
CHGLX
G3
BST
G1, H1, J1
CHGPG
G2
CHGRGSUB
GND
5
Power
CHGIN
Power
Charger Switching Node. Connect the inductor between
CHGLX and SYS.
4
High-side FET Driver Supply. Bypass BST to CHGLX with a
0.1µF/6.3V ceramic capacitor.
1
Charger Power Ground Connection
2
GND
Substrate Charger Ground Connection
1
GND
1
1
F5
AVL
Analog Voltage Level. Output of on-chip 5V LDO used to
power on-chip, low-noise circuits. Bypass with a 2.2µF/10V
ceramic capacitor to GND. Powering external loads from AVL
is not recommended, other than pulldown resistors.
G4
PVL
Internal bias regulator high current output bypass pin.
Supports internal noisy and high current gate drive loads.
Bypass to PGND with a minimum 10µF/10V ceramic
capacitor.
C7
CHGIND
C1, C2, D1,
D2
BATT
E4
BAT_SP
Battery Positive Differential Sense Connection. Connect to
the positive terminal close to the battery.
BATT
F3
BAT_SN
Battery Negative Differential Sense Connection. Connect to
the negative or ground terminal close to the battery.
BATT
www.maximintegrated.com
Charging Status Indication GPIO output. Open-drain, option
to tie to charger as an active-low output that indicates when
the charging is active.
Battery Power Connection. Connect to the positive terminal of
a single-cell (or parallel cell) Li-ion battery. Bypass BATT to
CHGPG ground plane with a 10µF/10V ceramic capacitor.
AVL
I/O
4
Maxim Integrated | 29
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Pin Description (continued)
PIN
NAME
FUNCTION
REF SUPPLY
E6
INOKB
Charger input valid, active-low logic output flag. Open-drain
output indicates when valid voltage is present at both CHGIN
and SYS.
1
DETBATB
Battery Detection Active-Low Input. Connect this pin to the ID
pin on the battery pack. If DETBATB is pulled below 80% of
the externally applied VIO voltage, this is an indication that
the battery is present and the charger starts when valid
CHGIN and/or WCIN power is present. If DETBATB is driven
high to VIO voltage or left unconnected, this is an indication
that the battery is not present and the charger does not start.
DETBATB is pulled high to VIO pin through an off-chip pullup
resistor.
1
B2
ONKEY
ONKEY is an active-low signal with default 1000ms debounce
timer. When no charging source is available at CHGIN,
enable DISQIBS bit (DISIBS = 1) with I2C to set the device in
ship mode. With a healthy battery, pressing the ONKEY
longer than the debounce timer re-enables the QBAT switch
and the device exits ship mode.
AVL
F6
OVPENB
Logic-low enable pin enables the external overvoltage
protection IC.
1
D7
VBUSDET
Input Voltage Detection Pin. This input pin is a voltage
clamped version of the input voltage and is used to trigger the
device OVLO/UVLO features. Connect a 1µF ceramic
capacitor between this pin and CHGPG (ground).
1
B5
SLAVE
C5
SWI1
Data Input/Output. Open-drain, 1-wire interface pin for slave
1.
C6
SWI2
Data Input/Output. Open-drain, 1-wire interface pin for slave
2.
B3
CSP
Slave-Charger Sense Current Positive Input. Option to add a
10mΩ sense resistor from CSP to CSN to have current sense
information return to the master for processing. If slave
charging is unused, short this pin to BATT.
C3
CSN
Slave-Charger Sense Current Negative Input. Option to add a
10mΩ sense resistor from CSP to CSN to have current sense
information return to the master for processing. If slave
charging is unused, short this pin to BATT.
J7
SAFEOUT
E8
F9
E7
Input pin to indicate if slave charger is connected. Short to
GND_A—no slave charger connected. Short to
SYS_A—slave charger connected.
1
1
Safeout LDO Output. Default 4.9V and on when CHGIN
power is valid. Bypass with a 1µF/10V ceramic capacitor to
GND.
1
VIO
Digital I/O Supply Input for I2C interface
1
SDA
I2C Serial Data
1
1
E9
SCL
I2C Serial Clock
D8
INTB
Interrupt Output. Active-low, open-drain output.
1
B1
THM
Thermistor Connection. Determine battery temperature using
ratiometric measurement.
1
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TYPE
Maxim Integrated | 30
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Pin Description (continued)
PIN
NAME
FUNCTION
A2
THMB
Pullup voltage for THM pin pullup resistor that can be
switched to save power.
C9
TEST1
Test I/O Pin. Ground this pin in the application.
VCCTEST
B8
TEST2
Test I/O Pin. Ground this pin in the application.
1
B7
TEST3
Test I/O Pin. Ground this pin in the application.
1
B6
TEST4
Test I/O Pin. Ground this pin in the application.
1
B9
VCCTEST
Test Mux Supply. Ground this pin in the application.
1
1
1
A7
DN
Common Negative Output 1. Connect to D- on mini/micro
USB connector.
A8
DP
Common Positive Output2. Connect to D+ on mini/micro USB
connector.
A6
CC1
Type-C CC pin 1, can be connected in parallel with USB
power delivery transceiver.
A4
CC2
Type-C CC pin 2, can be connected in parallel with USB
power delivery transceiver.
A5
VCONNIN
B4
VCONNBTEN_S
F7, F8, G7,
G8, G9, H7,
H8, H9
YS
NC1–NC8
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REF SUPPLY
TYPE
1
5V power supply for supplying power to the unused CC pin if
required.
Output pin, used to enable external VCONN boost.
No connection. Connect to GND.
Maxim Integrated | 31
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Functional Diagrams
Functional Block Diagram
MAX77860
4
OUT
CHGIN
BYP
2.2µF/25V
OVP
(OPTIONAL)
OVPENB
VBUSDET
AVL
2.2µF
/10V
VSYS
DN
DP
PVL
10µF
/10V
ISENSE
AND OTG SWITCH,
COMPARATOR
0.47µH
CHGRGSUB
CHGIND
GND
2.2kΩ
2.2kΩ
200kΩ
VIO
INTB
MECH SWITCH
ONKEY
I²C SERIAL PORT
AND
REGISTERS
AND
CONTROL
3.15A
SWITCHING
CHARGER
AND
REVERSE
BOOST
THM
THMB
DETBATB
SAFEOUT LDO
SYS_A
4
VCCTEST
TEST_
CC1
CC2
10kΩ
TEST
DN
DP
4
10µF/10V
BAT_SP
BAT_SN
SAFEOUT
AP
VIO
BATT
SW1
SW2
1µF/10V
VSYS
2 X 10µF/10V
CHGPG 3
5
SYS
REVERSE
BLOCKING
SDA
SCL
AP
USB TYPE-C
CC/ADAPTOR
DETECTION
GND_A
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0.1µF/6.3V
CHGLX
INOKB
VSYS 470Ω
0.1µF/
6.3V
2 X 10µF/25V
BST
CC1
CC2
4
RID
0.1µF
/50V
IN
200kΩ
USB-C CONNECTOR
VBUS
9
GND_Q
CSP
MASTER/SLAVE,
EXT. SENSE,
CONTROL
GND_D
NC
OPTIONAL CHARGER
CSN
8
Maxim Integrated | 32
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Detailed Description
Switching Charger
The MAX77860 includes a full featured switch-mode charger for a one-cell lithium ion (Li+) or lithium polymer (Li-polymer)
battery. The current limit for CHGIN input is independently programmable from 0 to 4.0A in 33.3mA steps allowing the
flexibility for connection to either an AC-to-DC wall charger or a USB port. The CHGIN input current limit default is set
between 100mA and 500mA (programmed default).
It also integrates a charging source detector based on signatures from USB D+/D- lines with a USB Type-C connector CC
pin detector. The USB data lines are probed using a USB Battery Charging Specification revision 1.2 compliant scheme
and additional proprietary charger type detection. Type-C detector supports USB Type-C DRP (dual role port) and other
applications.
The synchronous switch-mode DC-DC converter can operate at either 2MHz or 4MHz switching frequency, which is ideal
for portable devices due to the flexibility of using small components while eliminating excessive heat generation. The DCDC converter can be operated in either buck or reverse-boost mode. When charging the battery, the DC-DC converter
operates as a buck converter. In this mode, it operates from 3.2V to 14V input source and provides up to 3.15A charging
current (programmable) to the battery. When operating in reverse-boost mode, the DC-DC converter uses energy from
the main battery to boost the voltage at BYP. The boosted BYP voltage can then be used for the USB OTG function.
The IC makes the best use of the limited adapter power and the battery’s power at all times to supply up to 3.15A
continuous (4A peak) current from the buck to the system. Additionally, supplement mode provides additional current
from the battery to the system up to 4.5ARMS, and the BATT to SYS switch has overcurrent protection (see the MainBattery Overcurrent Protection section for more information). Adapter power that is not used for the system goes to
charge the battery.
Maxim’s proprietary process technology allows for low-RDS(ON) devices in a small solution size. The total dropout
resistance from adapter power input to the battery is 0.15Ω (typ) assuming that the inductor has 0.04Ω of ESR. This
0.15Ω typical dropout resistance allows for charging a battery up to 3.15A from a 5V supply.
Safety features ensure reliable charging, such as charge timer, watchdog, junction thermal regulation, over/under voltage
protection, short circuit protection, etc., are also implemented on the IC.
Features
● Single-Cell Switch-Mode Battery Charger
• Adapter/USB Input
• Up to 14V Adapter Charging (The OVLO level of the external input switch connected to CHGIN should be set lower
than MAX77860 OVLO.)
• Up to 4.0A Input Current Limit (programmable)
● Battery Charge Current (up to 3.15A)
• CC, CV, and Die Temperature Control
• Support for External Battery Disconnect FET
• Support for Battery Discharge Overcurrent protection up to 6ARMS (programmable)
● Reverse Boost Capability
• Supports USB-OTG Accessories
• Up to 5.1V/2A
• Programmable OCP Threshold
● Support for USB Battery Charger rev 1.2 Detection
• Data Contact Detection (DCD)
• Detects all USB defined sources
• Standard USB Port
• Charging Downstream Port
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Maxim Integrated | 33
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
• Dedicated Charging Port
• Adapter Type Detection
• Manual Restart of Charger Detection
● Support USB Type-C (rev 1.1) Including:
• USB Type-C
• Integrated VCONN Switch
• CC Pin
• Supports 20V Pull (through 10k min external resistor) Source Requirement
• Dead Battery Clamp Allowing for Unpowered Upstream Facing Port (UFP) Identification
● Single Safeout LDO
● I2C Serial Interface
USB Data Contact Detection
The USB plugs are designed so that when the plug is inserted into the receptacle, the power pins make contact before
the data pins. The result is that VCHGIN makes contact before the data pins make contact.
To ensure that the data pins have made contact, BC 1.2 makes it optional to detect when the data pins have made
contact. To detect when the data pins have made contact, the data pins are prebiased so at least one of the data pins
changes state. Therefore, when a change in data pin state is detected, the charger proceeds to identify the type of
attached port.
DP and DN
The internal USB full speed/low speed transceiver is brought out to the bi-directional data pins DP and DN. These
pins are ESD protected up to ±15kV. Connect these pins to a USB “B”/costume connector through external 20Ω series
resistors. The IC provides an automatic switchable 1.5kΩ pullup resistor for D- (low speed) and D+ (high speed).
Adapter Detection
When an adapter is present on the VCHGIN, the IC examines the device that is inserted to identify the type of adapter.
The possible adapter types are:
• Dedicated charger
• Non-compliant dedicated chargers
• Charger downstream port (host or hub)
• USB 2.0 (host or hub) low power
• USB 2.0 (host or hub) high power
Each of these devices have different current capabilities as shown in Table 1.
Table 1. Supported Adapter Types
ADAPTER TYPE
Dedicated Charger
Charger Downstream Port
OUTPUT VOLTAGE
OUTPUT CURRENT
4.75V to 5.25V at Iload < 500mA
2.0V to 5.25V at Iload ≥ 500mA
500mA to Imax
4.75V to 5.25V at Iload < 500mA
500mA to 900mA for low-speed and full-speed
2.0V to 5.25V at Iload ≥ 500mA
500mA to 1.5A for low-speed and full-speed
Apple 500mA
4.75V to 5.25V at Iload < 500mA
500mA maximum
Apple 1A
4.75V to 5.25V at Iload < 1A
1A maximum
Apple 2A
4.75V to 5.25V at Iload < 2A
2A maximum
Apple 12W
4.75V to 5.25V at Iload < 2.4A
2.4A maximum
Samsung 2A
4.75V to 5.25V at Iload < 2A
2A maximum
USB 2.0 Low Power
4.25V to 5.25V
100mA maximum
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Maxim Integrated | 34
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Table 1. Supported Adapter Types (continued)
USB 2.0 High Power
4.75V to 5.25V
500mA maximum
Charging Status Indicator
The IC has a charging status indicator to notify the user of various charging states as shown in Figure 1.
LEDEN
VPQUTH
LEDEN
CHGIND
BLOCK
Figure 1. Charging Status Indicator
Dead Battery State
When the battery is dead and below prequal threshold, LED0 is set up to blink with 50ms ON time in 1s period.
LEDEN bit is enabled by default.
Prequal Battery State
When the battery is dead and below prequal threshold, LED0 is set up to blink with 50ms ON time in 1s period. The
LEDEN bit is enabled by default.
Fast-Charge Battery State
When the battery is in fast-charge state, CHGIND LED is set up to be enabled 100%. The LEDEN bit can be
programmed to disable, but is enabled by default.
Fast-Charge Constant Voltage State
When the battery is in fast-charge state, CHGIND LED is set up to be enabled 100%. The LEDEN bit can be
programmed to disable, but is enabled by default.
Topoff State
When the battery is in topoff-charge state, CHGIND LED is set up to blink with 50% ON time in 1s. The LEDEN bit
can be programmed to disable, but is enabled by default.
Done State
When the battery is in done-charge state, CHGIND LED is set up to be disabled.
External Input OVP Driver
The driving circuit of external OVP on the input side is taken from the IC charger. The use of this feature is as follows:
● Blocking FET from input transient voltage during USB insertion/removal event.
● The polarity of the driving signal logic can be OTP programmable.
Input Current Limit
The default settings of the CHGIN_ILIM and MODE control bits are such that when a charge source is applied to CHGIN,
the IC turns its DC-DC converter on in BUCK mode, limits VSYS to VBATREG, and limits the charge source current to
500mA. All control bits are reset on global shutdown.
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Maxim Integrated | 35
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Input-Voltage Regulation Loop and Adaptive Input Current Limit (AICL)
An input-voltage regulation loop ensures proper charger operation even when it is attached to power sources with poor
transient load responses. The loop improves performance with relatively high resistance charge sources that exist when
long cables are used or devices are charged with noncompliant USB hub configurations. Additionally, this input-voltage
regulation loop improves performance with current limited adapters. If the ICs input current limit is programmed above
the current limit threshold of given adapter, the input voltage loop allows the IC to regulate at the current limit of the
adapter. Finally, the input-voltage regulation loop allows the IC to perform well with adapters that have poor transient
load response times.
The input-voltage regulation loop automatically reduces the input current limit in order to keep the input voltage at
VCHGIN_REG. If the input current limit is reduced to ICHGIN_REG_OFF (50mA, typ) and the input voltage is below
VCHGIN_REG, then the charger input is turned off. The input-voltage regulation loop automatically reduces the input
current limit to keep the input voltage at VCHGIN_REG (programmable). If the input current limit is reduced to
ICHGIN_REG_OFF (50mA, typ) and the input voltage is below VCHGIN_REG, then the charger input is turned off.
After operating with the input-voltage regulation active, a BYP_I interrupt is generated, BYP_OK is cleared, and
BYP_DTLS = 0b1xxx. To optimize input power when working with a current limited charge source, monitor the
BYP_DTLS while decreasing the input current limit. When the input current limit is set below the limit of the adapter, the
input voltage rises. Although the input current limit is lowered, more power can be extracted from the input source when
the input voltage is allowed to rise. For example, optimum use of input-voltage regulation with an adapter programmed
to 0.5A current limit and having a cable resistance between 300mΩ and 3Ω.
Battery Detect Input Pin (MDETBATB)
DETBATB is tied to the ID pin of the battery pack. If DETBATB is pulled below 80% of VIO pin voltage, this is an indication
that the main battery is present and the battery charger starts upon valid CHGIN. If DETBATB is left unconnected or
equal to VIO voltage, this indicates that the battery is not present and the charger does not start upon valid CHGIN, see
Figure 4. DETBATB is internally pulled to BATT through an external resistor. The DETBATB status bit is valid when BATT
is not present.
VCC
MAX77860
VIO
2R
RBIAS
8R
ID
DETBATB
GND
VCC
SYSTEM
IC
ADC
RP
BATTERY
PACK
GND
Figure 2. DETBATB Internal Circuitry and System Diagram
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Maxim Integrated | 36
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Charge States
The IC utilizes several charging states to safely and quickly charge batteries as shown in Figure 3. An exaggerated view
of a Li+/Li-Poly battery is shown in Figure 4 when there is no system load and the die and battery are close to room
temperature as it progresses through the following charge states:
1.
2.
3.
4.
Prequalification
Fast-charge
Topoff
Done
NO INPUT POWER or
CHARGER DISABLED
CHG_DTLS = 0x08
CHG_OK = 1
ICHG = 0
CHG Timer = 0
WD Timer = 0
MODE[3:0]
PROGRAMED THE
CHARGER TO BE OFF
ANY STATE
except thermal
shutdown
CHGIN is INVALID
CHGIN is VALID
and MODE PROGRAMMED
FOR CHARGER ENABLED
(CHG Timer = Resume
WD Timer = Resume)
WATCHDOG Suspend
CHG_DTLS = 0x0B
CHG_OK = 0
ICHG = 0
WD Timer > tWD
(CHG Timer = Suspend,
only if WDTEN = 1)
TJ < TSHDN
(CHG Timer = Suspend
WD Timer = Suspend)
Thermal Shutdown
CHG_DTLS = 0x0A
CHG_OK = 0
ICHG = 0
DEAD-BATTERY
PREQUALIFICATION
CHG_DTLS = 0x00
CHG_OK = 1
ICHG < = IPQDB
WDTCLR[1:0] = 0b10
(WD Timer = 0 & Resume
CHG Timer = Resume)
TJ > TSHDN
(CHG Timer = 0
WD Timer = 0)
From: any prequal state, any fast charge state, top-off, done
or timer fault.
Returns To: the same state that it came from.
G
CH
VMBATT > VPQDB
(Soft Start)
er
Tim
VMBATT < VPQDB
(Soft Start)
Q
> tP
LOW-BATTERY
PREQUALIFICATION
CHG_DTLS = 0x00
CHG_OK = 1
If PQEN = 1, then ICHG < = IPQLB
If PQEN = 0, then ICHG < = IFC
VMBATT < VPQLB
(CHG Timer = 0)
CHG
VMBATT < (VBATREGVRSTRT)
(No Soft Start,
CHG Timer = Resume)
VMB
A
VRS TT < (VBATR
TR
EG (No S T )
CHG oft Start,
Time
r=R
esum
e)
r>t
VMBATT > VPQLB
(Soft Start, CHG Timer = 0)
FAST CHARGE (CC)
CHG_DTLS = 0x01
CHG_OK = 1
ICHG < = IFC
VMBATT < VBATREG
Time
PQ
TIMER FAULT
CHG_DTLS = 0x06
CHG_OK = 0
IBAT = 0
CHG Timer > tFC
VMBATT = VBATREG for
56ms
CHG Timer > tFC
FAST CHARGE (CV)
CHG_DTLS = 0x02
CHG_OK = 1
ICHG < = IFC and ICHG > ITO
IMBATT < ITO for tTERM
(CHG Timer = 0 &
Suspend)
TOP OFF
CHG_DTLS[3:0] = 0x03
CHG_OK = 1
ICHG < = IFC
SWI1 or
SWI2 = 1
YES
NO
DONE
CHG_DTLS = 0x04
CHG_OK = 1
ICHG = 0
If
(1) SWI1 = SWI2 =
high: turn off the
slave charger which
has lower charging
current setting
(2) SWI1 = high, SWI2
= low: turn off Slave
#1
(3) SWI1 = low, SWI2
= high: turn off Slave
#2
(4) SWI1 = SWI2 =
low, do nothing
CHG Timer > tTO
Figure 3. Charger State Diagram
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Maxim Integrated | 37
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
DONE
CHG_DTLS[3:0] = 0b0100
TOP-OFF
CHG_DTLS[3:0] = 0b0011
RESTART
FAST CHARGE (CV)
CHG_DTLS[3:0] =
0b0010
DONE
CHG_DTLS[3:0] = 0b0100
TOP-OFF
CHG_DTLS[3:0] = 0b0011
FAST CHARGE (CV)
CHG_DTLS[3:0] = 0b0010
FAST CHARGE (CC)
CHG_DTLS[3:0] = 0b0001
LOW-BATTERY
PREQUALIFICATION
CHG_DTLS[3:0] = 0b0000
STATES
DEAD-BATTERY
PREQUALIFICATION
CHG_DTLS[3:0] =
0b0000
NOT TO SCALE, VCHGIN = 5.0V, ISYS = 0A, TJ = 25°C
BATTERY VOLTAGE
VBATREG
VRSTRT
NOTE 1
VPQLB
VPQDB
0V
BATTERY CHARGE CURRENT
TIME
ICHG ≤ ISET
IPQLB
IPQDB
ITO
0A
Charger
enabled
TIME
NOTE 1: A typical Li+/Li-Poly has an internal battery pack protection circuit that opens the battery connection when the battery’s cell voltage is
lower than a dead battery threshold (VDB.FALLING~2.5V). To get the pack protection to close again, the charger charges the battery capacitor with
IPQDB until the voltage exceeds VPQDB. Then the charger charges the battery capacitor with IPQLB. When the battery capacitor’s voltage exceeds
VDB.RISING~2.6V, then the battery pack protection circuit closes which connects the cell to the charger. VDB.FALLING and VDB.RISING are not determined
by the charger – they are properties of the battery.
Figure 4. Li+/Li-Poly Charge Profile
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Maxim Integrated | 38
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
Dead-Battery Prequalification State
As shown in Figure 3, the dead-battery prequalification state occurs when the main-battery voltage is less than VPQDB.
After being in this state for tSCIDG, a CHG_I interrupt is generated, CHG_OK is set, and CHG_DTLS is set to 0x00. In
the dead-battery prequalification state, charge current into the battery is IPQDB.
The following events cause the state machine to exit this state:
● Main battery voltage rises above VPQDB and the charger enters the “Low-Battery Prequalification” state.
● If the battery charger remains in this state for longer than tPQ, the charger state machine transitions to the “Timer
Fault” state.
● If the watchdog timer is not serviced, the charger state machine transitions to the “Watchdog Suspend” state.
Note that the dead-battery prequalification state works with battery voltages down to zero volts. The low zero volt
operation typically allows this battery charger to recover batteries that have an “open” internal pack protector. Typically, a
packs internal protection circuit opens if the battery has experienced an overcurrent, undervoltage, or overvoltage event.
When a battery with an “open” internal pack protector is used with this charger, the low-battery prequalification mode
current flows into the 0V battery. This current raises the pack’s terminal voltage to the point where the internal pack
protection switch closes.
Note that a normal battery typically stays in the low-battery prequalification state for several minutes or less. Therefore,
a battery that stays in low-battery prequalification state for longer than tPQ might be experiencing a problem.
Fast-Charge Constant Current State
As shown in Figure 3, the fast-charge constant current (CC) state occurs when the main-battery voltage is greater than
the low-battery prequalification threshold and less than the battery regulation threshold (VPQLB < VBATT < VBATREG).
After being in the fast-charge CC state for tSCIDG, a CHG_I interrupt is generated, CHG_OK is set, and CHG_DTLS =
0x01.
In the fast-charge CC state, the current into the battery is less than or equal to IFC. Charge current can be less than IFC
for any of the following reasons:
●
●
●
●
The charger input is in input current limit.
The charger input voltage is low.
The charger is in thermal foldback.
The system load is consuming adapter current. Note that the system load always gets priority over the battery charge
current.
The following events cause the state machine to exit this state:
● When the main battery voltage rises above VBATREG, the charger enters the "Fast Charge (CV)" state.
● If the battery charger remains in this state for longer than tFC, the charger state machine transitions to the “Timer
Fault” state.
● If the watchdog timer is not serviced, the charger state machine transitions to the “Watchdog Suspend” state.
The battery charger dissipates the most power in the fast-charge constant current state.This power dissipation causes
the internal die temperature to rise. If the die temperature exceeds TREG, IFC is reduced.
Topoff State
As shown in Figure 3, the topoff state can only be entered from the fast-charge CV state when the charger current
decreases below ITO for tTERM. After being in the topoff state for tSCIDG, a CHG_I interrupt is generated, CHG_OK is
set, and CHG_DTLS = 0x03. In the topoff state, the battery charger tries to maintain VBATREG across the battery and
typically the charge current is less than or equal to ITO.
The smart power selector control circuitry may reduce the charge current lower than the battery may otherwise consume
for any of the following reasons:
● The charger input is in input current limit.
● The charger input voltage is low.
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Maxim Integrated | 39
MAX77860
USB Type-C, 3A Switch-Mode Buck Charger with
Integrated CC Detection, Reverse Boost, and ADC
● The charger is in thermal foldback.
● The system load is consuming adapter current. Note that the system load always gets priority over the battery charge
current.
The following events cause the state machine to exit this state:
● After being in this state for the topoff time (tTO), the charger enters the "Done" state.
● If VBATT < VBATREG – VRSTRT, the charger goes back to the “Fast-Charge (CC)” state.
● If the watchdog timer is not serviced, the charger state machine transitions to the “Watchdog Suspend” state.
Done State
As shown in Figure 3, the battery charger enters its done state after the charger has been in the topoff state for tTO. After
being in this state for tSCIDG, a CHG_I interrupt is generated, CHG_OK is cleared, and CHG_DTLS = 0x04.
The following events cause the state machine to exit this state:
● If VBATT < VBATREG – VRSTRT, the charger goes back to the “Fast-Charge (CC)” state.
● If the watchdog timer is not serviced, the charger state machine transitions to the “Watchdog Suspend” state.
In the done state, the charge current into the battery (ICHG) is 0A. In the done state, the charger presents a very low
load (IMBDN) to the battery. If the system load presented to the battery is low (
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