EVALUATION KIT AVAILABLE
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
General Description
Benefits and Features
● Accurate Bus Current Limiting with
Minimal Voltage Drop
• Low RON 90mΩ (max) USB Power Switch
• 0.65A (typ), MAX20042F
• 1.0A (typ), MAX20043F
• 1.3A (typ), MAX20044F
● Targeted Features for Optimized USB Performance
• Two RON 4Ω (typ) USB 2.0 Data Switches
• 480Mbps or 12Mbps USB 2.0 Operation
• 10ms Fault-Recovery Time
• 1ms Overcurrent Blanking Time
• 5.67V (typ) Fixed HVBUS Protection Trip Threshold
● Robust for the Automotive Environment
• Short-to-Battery and Short-to-GND Protection on
Protected HVBUS Output
• Short-to-Battery and Short-to-BUS Protection on
Protected HVD+ and HVD- Outputs
• Tested to ISO 10605 and IEC 61000-4-2 ESD
Standards
• 16-Pin (3.90mm x 4.94mm) QSOP Package
• -40°C to +105°C Operating Temperature Range
• AEC-Q100 Qualified
The MAX20042F, MAX20043F, and MAX20044F devices
provide high ESD and short-circuit protection for the
low-voltage internal USB data and USB power line in automotive radio, navigation, connectivity, and USB hub applications. The devices support USB Hi-Speed (480Mbps),
USB full-speed (12Mbps), and USB low-speed (1.5Mbps)
operation, as well as USB on-the-go (OTG) functionality.
The short-circuit protection features include short-tobattery on the protected HVBUS, HVD+, and HVDoutputs, as well as short-to-HVBUS on the protected
HVD+ and HVD- outputs. The devices are capable of a
short-to-battery condition of up to +18V. Short-to-GND
protection and overcurrent protection are also provided
on the protected HVBUS output to protect the internal
BUS power rail from an overcurrent fault.
The devices feature high ESD protection to ±15kV Air Gap
and ±8kV Contact on the protected HVBUS, HVD+, and
HVD- outputs.
The devices feature a low on-resistance (RON),
90mΩ (max) USB power switch, and two low onresistance (RON), 4Ω (typ) USB 2.0 data switches. These
devices also feature an enable input, a fault output, a
10ms fault-recovery time, a 1ms overcurrent blanking
time, and an integrated overcurrent autoretry.
Applications
● Automotive USB Protection
The MAX20042F, MAX20043F, and MAX20044F are
available in a lead-free, 16-pin QSOP package and
operate over the -40°C to +105°C temperature range.
Ordering Information appears at end of data sheet.
Functional Diagram appears at end of data sheet.
Typical Operating Circuit
+3.3V
IN
DUSB
CONNECTOR
D+
HVDFAULT
EN
MAX20042F D-
HVD+
MAX20043F
MAX20044F
BUS
HVBUS
LOW-VOLTAGE
USB
TRANSCEIVER
D+
GND
GND
19-8707; Rev 0; 1/17
BUS
+ 5V
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
Absolute Maximum Ratings
(All voltages referenced to GND.)
BUS, IN....................................................................-0.3V to +6V
FAULT, EN, D+, D-...................................................-0.3V to +6V
D+, D- to IN.........................................................................+0.3V
HVD+, HVD-, HVBUS............................................-0.3V to +18V
Continuous Power Dissipation (TA = +70°C)
16-Pin QSOP (derate 9.6mW/°C above +70°C)........771.5mW
Operating Temperature Range ......................... -40°C to +105°C
Storage Temperature Range............................. -65°C to +150°C
Junction Temperature.......................................................+150°C
Lead Temperature (soldering, 10s).................................. +300°C
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 Thermal Characteristics (Note 1)
QSOP
Junction-to-Ambient Thermal Resistance (θJA)......103.7°C/W
Junction-to-Case Thermal Resistance (θJC)................37°C/W
Note 1: 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.
Electrical Characteristics
(VBUS = 5.0V VIN = +3.3V, TJ = TA = -40°C to +105°C. RL = ∞, unless otherwise noted. Typical values are at VEN = 0V or VEN = 3.3V
and TA = +25°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
POWER SUPPLY
Power-Supply Range (BUS)
VBUS
4.75
Power-Supply Range (IN)
VIN
3.6
V
Input Current (BUS)
IBUS
VEN = 0V, IL = 0A, no fault
400
µA
IIN
VEN = 0V, IL = 0A, no fault
10
µA
V
Input Current (IN)
BUS Undervoltage Lockout
VUVLO
3.0
VBUS falling, Figure 1
3.85
4.2
4.55
5.55
5.67
5.8
V
0.3
3.0
µs
10
22
ms
2.2
V
0.3
1
µs
1
2
4
ms
51
90
mΩ
MAX20042F, Figure 4
0.57
0.65
0.73
BUS ANALOG SWITCH
HVBUS Protection Trip Threshold
VOV_BUS
HVBUS rising, Figure 2
Voltage Protection Response Time
tFP_BUS
HVBUS rising, Figure 2
Protection Recovery Time
tFPR_BUS
HVBUS Short-to-Ground
Threshold
VSHRT
Short-to-Ground Response Time
Short Detection Time
On-Resistance
tFPS
tSHRT_DET
RON
Forward-Current Threshold
(Note 3)
ITHR
Overcurrent Blanking Time
tBLANK
Overcurrent-Retry Blanking Time
Overcurrent Autoretry Time
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HVBUS falling to below VOV_BUS, Figure 2
4.5
Figure 3
0.7
HVBUS falling to GND, Figure 3
Enabled into short-to-ground
VBUS = 5V, IBUS = 500mA (Note 2)
MAX20043F, Figure 4
0.88
1.00
1.12
MAX20044F, Figure 4
1.14
1.30
1.46
Figure 4 (Note 4)
0.35
1.2
2.8
tBLANK_RETRY Figure 4
tRETRY
Figure 4
A
ms
12
ms
128
ms
Maxim Integrated │ 2
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
Electrical Characteristics (continued)
(VBUS = 5.0V VIN = +3.3V, TJ = TA = -40°C to +105°C. RL = ∞, unless otherwise noted. Typical values are at VEN = 0V or VEN = 3.3V
and TA = +25°C, unless otherwise noted.) (Note 2)
PARAMETER
HVBUS Off-Leakage Current
SYMBOL
ILKGOFF
CONDITIONS
MIN
TYP
VHVBUS = 18V, VBUS = 4.75V
MAX
750
VHVBUS = 18V, VBUS = 0V, VIN = 0V
560
Thermal Shutdown
Thermal-Shutdown Hysteresis
UNITS
µA
+175
°C
15
°C
D+, D- ANALOG USB SWITCHES
Analog Signal Range
0
Protection Trip Threshold
VOV_D
HVD+, HVD- rises from VIN to > VIN + 1,
Figure 2
Protection Response Time
tFP_D
HVD+, HVD- rises from VIN to > VIN + 1,
Figure 2
Protection Recovery Time
tFPR_D
On-Resistance
On-Resistance Match Between
Channels
RON
∆RON
HVD+, HVD- falling to below VOV_D,
Figure 2
4.5
VBUS = 5V, IL = 40mA, 0 ≤ VD_ ≤ 3.6V
3.6
V
3.9
V
3.0
8.0
µs
10
22
ms
4
VBUS = 5V; IL = 40mA; VD_ = 1.5V, 3.0V
0.7
IL = 40mA, VD_ = 0V or 0.4V
1.0
Ω
1.5
Ω
On-Resistance Flatness
RFLAT(ON)
HVD+, HVD- Off-Leakage Current
IHVD_OFF
VHVD+, VHVD- = 18V; VD+, VD- = 0V;
VIN = 0V; VBUS = 0V
45
HVD+, HVD- On-Leakage Current
IHVD_ON
VHVD+, VHVD- = VIN or 0V; VEN = 0V
+2.2
µA
Propagation Delay
tPLH, tPHL
RL = RS = 50Ω, Figure 7
200
ps
VHVD+, VHVD- = 18V; VD+, VD- = 0V
-200
+100
Ω
+200
µA
Output Skew Between Switches
tSKB
Skew between D+ and D- switch, Figure 7
40
ps
Output Skew Same Switch
tSKS
Skew between opposite transitions in
same switch, Figure 7
40
ps
VOL
ISINK = 500µA
FAULT OUTPUT
FAULT Output Low Voltage
FAULT Output High-Leakage
Current
FAULT-Recovery Time
tFPR
Input Logic-High
VIH
Input Logic-Low
VIL
EN INPUT
Input Leakage Current
Enable Delay Time
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IEN
tD_EN
VFAULT = VIN, Figure 3 (Note 3)
4.5
10
0.5
V
1
µA
22
ms
1.65
V
VEN = 0V or VIN
40
0.5
V
1
µA
µs
Maxim Integrated │ 3
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
Electrical Characteristics (continued)
(VBUS = 5.0V VIN = +3.3V, TJ = TA = -40°C to +105°C. RL = ∞, unless otherwise noted. Typical values are at VEN = 0V or VEN = 3.3V
and TA = +25°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ESD PROTECTION HVD+, HVD-, HVBUS
ESD Protection Level (Note 5)
VESD
ISO 10605 Air Gap (330pF, 2kΩ)
±25
ISO 10605 Contact (330pF, 2kΩ)
±8
IEC 61000-4-2 Air Gap (150pF, 330Ω)
±15
IEC 61000-4-2 Contact (150pF, 330Ω)
±8
IEC 61000-4-2 Air Gap (330pF, 330Ω)
±15
IEC 61000-4-2 Contact (330pF, 330Ω)
±8
kV
Note 2: Specifications with minimum and maximum limits are 100% production tested at TA = +25°C and are guaranteed over the
operating temperature range by design and characterization. Actual typical values may vary and are not guaranteed.
Note 3: Forward current is defined as current into BUS and out of HVBUS. See the Functional Diagram.
Note 4: Guaranteed by design. Limits are not production tested.
Note 5: Tested in the Typical Application Circuit, as shown on the MAX20044 evaluation kit.
Timing Diagrams/Test Circuits
VUVLO
VBUS
GND
ON
OFF
ON
DEVICE
FAULT
tFPR_BUS
GND
Figure 1. Timing Diagram for Undervoltage Lockout on BUS
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Maxim Integrated │ 4
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
Timing Diagrams/Test Circuits (continued)
VOV_D OR
VOV_BUS
GND
ON
DEVICE
OFF
tFP_D
tFP_BUS
ON
tFPR_D
tFPR_BUS
FAULT
GND
Figure 2. Timing Diagram for Overvoltage Protection on HVBUS, HVD+, and HVD-
HARD SHORT
HARD SHORT REMOVED
VHVBUS
VSHRT
GND
DEVICE
FAULT
ON
OFF
tFPS
ON
tFPR
GND
Figure 3. Timing Diagram for Short-to-Ground Protection
www.maximintegrated.com
Maxim Integrated │ 5
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
Timing Diagrams/Test Circuits (continued)
ITHR
CURRENT
GND
tBLANK
tBLANK_RETRY
tBLANK
tRETRY
DEVICE
ON
OFF
ON
OFF
FAULT
GND
Figure 4. Timing Diagram for Overcurrent Protection
D+
(D-)
MAX20042F
MAX20043F
MAX20044F
HVD+
(HVD-)
EN
50
VIN
NETWORK
ANALYZER
V
ON-LOSS = 20log OUT
VIN
V
CROSSTALK = 20log OUT
VIN
50
HVD+
D+
HVDON-LOSS2 = 20log
DHVD+
CROSSTALK1 = 20log
DHVDCROSSTALK2 = 20log
D+
ON-LOSS1 = 20log
VOUT
MEAS
50
REF
50
GND
ON-LOSS IS MEASURED BETWEEN D+ AND HVD+, OR D- AND HVD-.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 5. On-Channel -3dB Bandwidth and Crosstalk
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Maxim Integrated │ 6
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
Timing Diagrams/Test Circuits (continued)
MAX20042F
MAX20043F
MAX20044F
D_ OR
HVD_
EN
CAPACITANCE
METER
GND
Figure 6. On-Capacitance
INPUT+
RS
MAX20042F
MAX20043F
MAX20044F
D+
HVD+
RL
INPUT-
RS
D-
HVD-
OUT+ RISE-TIME PROPAGATION DELAY = tPLHX OR tPLHY
FALL-TIME PROPAGATION DELAY = tPHLX OR tPHLY
tSKB = |tPLHX - tPLHY| OR |tPHLX - tPHLY|
tSKS = |tPLHX - tPHLX| OR |tPLHY - tPHLY|
OUT-
RL
EN
VIL TO VIH
tINFALL
tINRISE
V+
VINPUT+
50%
50%
50%
50%
0V
90%
10%
90%
10%
V+
VINPUT0V
tOUTRISE
V+
tPLHX
VOUT+
tOUTFALL
tPHLX
50%
50%
50%
50%
0V
90%
10%
90%
10%
V+
VOUT0V
tPHLY
tPLHY
Figure 7. Propagation Delay and Output Skew
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Maxim Integrated │ 7
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
BUS SUPPLY CURRENT
vs. TEMPERATURE (EN = GND)
toc1
400
VEN = 0V
350
280
240
VBUS = 5.00V
VBUS = 4.75V
200
150
100
85
VBUS = 4.75V
50
0
10
35
60
TEMPERATURE (°C)
3.0
250
105
-40
HVD+/HVD- LEAKAGE CURRENT
vs. TEMPERATURE
V
= 5.0V, VIN == 3.3V
VBUS
3.3V
BUS = 5.0V, VIN
VEN
= 0V,
0V VCHEN =0V
EN =
6
5
HVD+/HVD- SHORTED TO +18V
11
HVD+/HVD- SHORTED TO +5V
10
4
9
8
-40
-15
10
35
60
TEMPERATURE (°C)
85
105
3
RON (Ω)
1.0
-40
-15
10
35
5
HVD+/HVD- SHORTED TO +5V
4
9
-40
-15
10
35
60
TEMPERATURE (°C)
85
105
3
toc6
VBUS = 5.0V, VIN = 3.3V
IL = 40mA
VIN = 3.6V
3.43
VIN = 3.0V
3.42
VIN = 3.3V
3.41
3.40
0.0
0.6
1.2
1.8
UNPOWERED
5V/div
VD_
5V/div
5V/div
VHVD_
2V/div
VFAULT
TA = +25°C
TA = -40°C
VIN
0.0
0.6
1.2
1.8
2.4
APPLIED DATA VOLTAGE (V)
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3.0
3.6
5V/div
40µs/div
3.6
toc9
5V/div
VHVD_
3.0
HVD+/HVD-SHORT-TO-BATTERY
TURN-OFF RESPONSE
toc8
POWERED
2.4
APPLIED DATA VOLTAGE (V)
TA = +105°C
2
85
DATA SWITCH RON vs. APPLIED DATA VOLTAGE
3.45
6
HVD+/HVD- SHORTED TO +18V
10
VD_
60
TEMPERATURE (°C)
3.44
toc7
4
0
1.5
VBUS = 0V, VIN = 0V
11
8
VBUS = 5.0V
VIN = 3.3V
VHVD = 3.3V
VEN = 0V
HVD+/HVD-SHORT-TO-BATTERY
TURN-OFF RESPONSE
VBUS = 5.0V
IL = 40mA
6
2.0
105
12
DATA SWITCH RON vs. APPLIED DATA VOLTAGE
8
85
toc5
13
12
10
35
60
TEMPERATURE (°C)
14
HVD+/HVD- CURRENT (uA)
HVD+/HVD- CURRENT - 18V (µA)
13
toc4
-15
VBUS = 5.00V
2.5
HVD+/HVD- LEAKAGE CURRENT
vs. TEMPERATURE
HVD+/HVD- CURRENT - 5V (µA)
14
toc3
3.5
RON (Ω)
220
-15
VBUS = 5.25V
HVD+/HVD- CURRENT (uA)
BUS SUPPLY CURRENT (uA)
BUS SUPPLY CURRENT (uA)
260
-40
HVD+/HVD- LEAKAGE CURRENT
vs. TEMPERATURE
4.0
300
VBUS = 5.25V
200
VEN = VIN
toc2
HVD+/HVD- CURRENT - 5V (µA)
300
BUS SUPPLY CURRENT
vs. TEMPERATURE (EN = VIN)
VFAULT
2V/div
5V/div
VIN
40µs/div
Maxim Integrated │ 8
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
HVBUS LEAKAGE CURRENT (µA)
130
CROSSTALK (dB)
-20
120
350
100
HVBUS SHORTED TO +6V
250
-40
110
HVBUS SHORTED TO +18V
300
-30
90
200
80
400
250
-60
200
BUS ON RESISTANCE
vs. TEMPERATURE
toc13
80
60
85
105
105
FREQUENCY
VBUS = 5.00V
VBUS = 4.75V
HVBUS SHORT-TO-BATTERY
TURN-OFF RESPONSE
toc14
105
85
100
toc15
5V/div
VBUS
VHVBUS
30
25
5V/div
20
VFAULT
0
85
2V/div
POWERED
105
40µs/div
ON RESISTANCE (mOhm)
INRUSH CURRENT EN ON RESPONSE
WITH RC LOAD
INRUSH CURRENT EN ON RESPONSE
WITH RC LOAD
HVBUS SHORT-TO-BATTERY
TURN-OFF RESPONSE
toc18
toc17
toc16
VFAULT
5V/div
VBUS
60
BUS On Resistance Histogram
5
10
35
60
TEMPERATURE (°C)
35
TEMPERATURE (°C)
10
-15
10
15
50
-40
-15
35
VBUS = 5.25V
40
-40
TEMPERATURE (°C)
40
70
RON (mΩ)
35
45
IL = 500mA
60
10
150
300
60
-15
200
HVBUS SHORTED TO +5V
HVBUS SHORTED TO +5
350
70
-40
HVBUS SHORTED
SHORTED TO
TO +18V
+18V
HVBUS
450
100
1000
250
500
150
100
FREQUENCY (MHz)
300
550
-50
10
toc12
VBUS
= 0V,
0V, V
VIN
= 0V
0V
V
BUS =
IN =
VEN= 0V
VEN = 0V
600
140
400
HVBUS LEAKAGE CURRENT
vs. TEMPERATURE
650
150
VBUS = 0V, VIN = 0V
VEN = 0V
450
-10
toc11
HVBUS LEAKAGE CURRENT (µA) - +5V
HVBUS LEAKAGE CURRENT
vs. TEMPERATURE
500
HVBUS LEAKAGE CURRENT (µA)
toc10
HVBUS LEAKAGE CURRENT (µA) - +6V
CROSSTALK
0
2V/div
VBUS
VHVBUS
5V/div
POWERE
D
1V/div
VFAULT
POWERE
D
2V/div
VBUS
1V/div
220µF
100µF
VHVBUS
220µF
2V/div
VHVBUS
2V/div
100µF
VFAULT
2V/div
NOT POWERED
40µs/div
www.maximintegrated.com
IHVBUS
2A/div
1ms/div
IHVBUS
2A/div
1ms/div
Maxim Integrated │ 9
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
HVBUS OVERCURRENT AUTORETRY RESPONSE
(VHVBUS>VSHRT)
HVBUS OVERCURRENT AUTORETRY RESPONSE
(VHVBUS< VSHRT)
SHORT-CIRCUIT CURRENT, DEVICE ENABLED
INTO SHORT-TO-GROUND
toc20
toc19
POWERE
D
2V/div
VEN
toc21
POWERE
D
POWERE
D
IHVBUS
IHVBUS
220u
F
VBUS
100mA/div
IHVBUS
5V/div
VHVBUS
VFAULT
5V/div
2ms/div
40µs/div
VHVBUS
toc23
30
40
20
FREQUENCY
25
FREQUENCY
50
15
10
5
0
0
USB 2.0 HIGH-SPEED DIAGRAM
(NO TUNING COMPONENTS)
USB 2.0 HIGH-SPEED EYE DIAGRAM
W/STANDARD EV KIT TUNING COMPONENTS
toc26
VBUS
5V/div
0.4
0.2
DIFFERENTIAL SIGNAL (V)
VFAULT
5V/div
0.0
-0.2
IHVBUS
toc27
0.4
DIFFERENTIAL SIGNAL (V)
VHVBUS
5V/div
0A
20
15
CURRENT-LIMIT
THRESHOLD (A)
toc25
3.3V
25
CURRENT-LIMIT
THRESHOLD (A)
HVBUS INRUSH CURRENT FOR
SHORT-TO-GROUND RESPONSE
5V
toc24
10
CURRENT-LIMIT
THRESHOLD (A)
5V
5V/div
MAX20044F
CURRENT-LIMIT HISTOGRAM
35
10
5V/div
VFAULT
30
20
5V/div
VBUS
60
30
220u
F
20ms/div
MAX20043F
CURRENT-LIMIT HISTOGRAM
toc22
FREQUENCY
100u
F
5V/div
MAX20042F
CURRENT-LIMIT HISTOGRAM
1A/div
500mA/div
100u
F
-0.4
0.2
0.0
-0.2
-0.4
10A/div
20µs/div
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0.0
0.5
1.0
TIME (ns)
1.5
2.0
0.0
0.5
1.0
TIME (ns)
1.5
2.0
Maxim Integrated │ 10
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
Pin Configuration
TOP VIEW
I.C. 1
+
16 I.C.
15 BUS
HVBUS 2
HVBUS 3
GND 4
HVD- 5
MAX20042F
MAX20043F
MAX20044F
HVD+ 6
14 BUS
13 GND
12 GND
11 EN
D- 7
10 FAULT
D+ 8
9 IN
QSOP
Pin Description
PIN
NAME
FUNCTION
1, 16
I.C.
2, 3
HVBUS
4, 12, 13
GND
Ground
5
HVD-
High-Voltage-Protected USB Differential Data D- Output. Connect HVD- directly to USB connector D-.
6
HVD+
High-Voltage-Protected USB Differential Data D+ Output. Connect HVD+ directly to USB connector D+.
7
D-
USB Differential Data D- Input. Connect D- to low-voltage USB transceiver D-.
8
D+
USB Differential Data D+ Input. Connect D+ to low-voltage USB transceiver D+.
9
IN
Logic Power-Supply Input. The supply voltage range is from +3.0V to +3.6V. Connect a 0.1µF and 10µF
capacitor from IN to GND. Place these components on the same plane as the IC, close to the IN and GND
pins.
10
FAULT
11
EN
14, 15
BUS
Internal Connection. Must be left unconnected.
Protected BUS Output. Connect HVBUS directly to the USB connector. Connect both HVBUS outputs together
for proper operation. Connect a 20V zener diode and a 0.1µF and 10µF capacitor from HVBUS to GND.
Open-Drain Fault Indicator Output. Used to indicate if an overvoltage condition exists on HVD-, HVD+,
or HVBUS, if an overcurrent condition exists on HVBUS, if a short-to-GND exists on HVBUS, or if an
overtemperature condition occurs.
Active-Low Enable Input. Drive EN low to enable the device.
USB Power Supply. Connect BUS to USB +5V supply. Connect both BUS inputs together for proper
operation. Connect a 0.1µF and a 100µF, low-ESR ceramic capacitor from BUS to GND.
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Maxim Integrated │ 11
MAX20042F–MAX20044F
Detailed Description
The MAX20042F, MAX20043F, and MAX20044F
devices provide high ESD and short-circuit
protection for the low-voltage internal USB data and
USB power line in automotive radio, navigation, connectivity, and USB hub applications. The devices
support both USB Hi-Speed (480Mbps) and USB fullspeed (12Mbps) operation.
The short-circuit protection features include short-to-battery on the protected HVBUS, HVD+, and HVD- outputs,
as well as short-to-HVBUS on the protected HVD+ and
HVD- outputs. These devices are capable of a short-tobattery condition of up to +18V. Short-to-GND protection
and overcurrent protection are also provided on the protected HVBUS output to protect the internal BUS power
rail from overcurrent faults.
The devices feature high ESD protection to ±15kV Air
Gap Discharge and ±8kV Contact Discharge on all protected HVBUS, HVD+, and HVD- outputs.
The devices feature a low on-resistance (RON) 0.14Ω
(max) USB power switch and two low on-resistance
(RON) of 4Ω (typ) USB 2.0 switches. These devices also
feature an enable input, a fault output, a 10ms fault-recovery time, a 1ms overcurrent blanking time, and an
integrated overcurrent autoretry.
BUS Undervoltage Lockout ( Power-On Reset)
The devices have a 4.2V (typ) undervoltage-lockout
threshold (VUVLO). When VBUS is less than VUVLO,
FAULT is enabled and all the device switches are high
impedance.
HVBUS Overvoltage Protection
The devices have a fixed 5.57V (typ) HVBUS protection
trip threshold; when HVBUS rises from VBUS to > 5.57V,
the device is turned off. Connect a 20V zener diode or
RC snubber network from HVBUS to GND to limit positive
inductive voltage spikes that are caused by the inductance from long wires at turn-off.
Automotive Hi-Speed USB 2.0 Protectors
HVBUS Overcurrent Protection
The devices have a 0.65A/1.0A/1.3A (typ) forward
current threshold ITHR. When the HVBUS forward
current exceeds the ITHR threshold, the device is turned
off. Forward current is defined as current into BUS and
out of HVBUS. See the Functional Diagram.
HVD+ and HVD- Overvoltage Protection
The devices have a 4.1V (typ) overvoltage threshold
(VOV_D). When HVD+, or HVD- is greater than VOV_D,
FAULT is enabled and all the device switches are high
impedance. Note that HVD+ and HVD- do not have shortto-ground protection. Forward current is limited by the
upstream transceiver.
FAULT Output
FAULT goes low when a fault is detected on HVD+, HVD-,
or HVBUS. The FAULT output is asserted low when the
device is enabled and the switches are disabled due to
a fault. Fault detection includes short-to-battery, shortto-GND or overcurrent on HVBUS, and short-to-battery
or short-to-HVBUS on HVD+ or HVD-. Connect a 100kΩ
pullup resistor from FAULT to IN.
EN Input
EN is an active-low enable input. Drive EN low for normal
operation and enable the protection switches. This allows
BUS power, D+, and D- USB signaling to pass through
the device if a fault is not present. Drive EN high to disable the device.
The MAX20042F, MAX20043F, and MAX20044F devices
support USB OTG. With these units, disabling the device
through the EN pin disables the +5V BUS power switch,
but leaves the D+ and D- data switches closed. This
allows for a downstream device to assume the role of
host when negotiated per the USB Host Negotiation
Protocol. In this mode, the HVBUS, HVD+, and HVDoutputs continue to be protected and FAULT continues to
assert normally in response to overvoltage conditions on
these pins.
HVBUS Short-to-Ground
The devices have a 0.7V (min) HVBUS short-to-ground
threshold (VSHRT). When HVBUS falls below the VSHRT
threshold, the main power switch is turned off. During
continuous short-to-ground conditions, an approximately
250mA autoreset current remains active to detect removal
of the short circuit.
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Maxim Integrated │ 12
MAX20042F–MAX20044F
Applications Information
Power-Supply Bypass Capacitor
Bypass HVBUS to GND with a 10µF and a 0.1µF ceramic
capacitor as close to the device as possible to provide
±15kV (HBM) ESD protection on the pin. If the power
source has significant inductance due to long lead length,
take care to prevent overshoots due to the LC tank circuit
and provide protection if necessary to prevent violation
of the +6V absolute maximum rating on BUS. Connect
a 100µF low-ESR ceramic capacitor from BUS to GND.
Connect a 0.1µF and 10µF ceramic capacitor from both
BUS and IN to GND. Place these components on the
same plane as the IC, close to the IN and GND pins.
Layout of USB Data Line Traces
USB Hi-Speed requires careful PCB layout with 90Ω
controlled-impedance matched traces of equal lengths.
Use LC tuning components on the data lines as shown in
the Typical Operating Circuit. The values of these components are layout and captive-cable dependent. Contact
Maxim technical support for more detailed information.
±15kV ESD Protection
As with all Maxim devices, ESD-protection structures are
incorporated on all pins to protect against electrostatic
discharges encountered during handling and assembly.
The devices have extra protection against static electricity. Maxim’s engineers have developed state-of-theart structures to protect against ESD of ±15kV at the
HVD+, HVD-, and HVBUS ports without damage. The
ESD structures withstand high ESD in all states: normal
operation, shutdown, and powered down. After an ESD
event, the devices keep working without latchup, whereas
other solutions can latch and must be powered down to
remove latchup. ESD protection can be tested in various
ways; this product is characterized for protection to the
following limits:
●
±15kV using the Human Body Model
●
±15kV using IEC 61000-4-2’s Air-Gap Discharge
method, EN = GND
●
±8kV using the Contact Discharge method specified
in IEC 61000-4-2, EN = GND
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Automotive Hi-Speed USB 2.0 Protectors
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents test
setup, test methodology, and test results.
Human Body Model
Figure 8 shows the Human Body Model, and Figure 9
shows the current waveform it generates when discharged
into a low impedance. This model consists of a 100pF
capacitor charged to the ESD voltage of interest, which is
then discharged into the device through a 1.5kΩ resistor.
IEC 61000-4-2
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. The MAX20042F,
MAX20043F, and MAX20044F devices help users design
equipment that meets Level 4 of IEC 61000-4-2. The
main difference between tests done using the Human
Body Model and IEC 61000-4-2 is higher peak current
in IEC 61000-4-2. Because series resistance is lower in
the IEC 61000-4-2 ESD test model (Figure 10), the ESD
withstand voltage measured to this standard is generally
lower than that measured using the Human Body Model.
Figure 11 shows the current waveform for the ±8kV, IEC
61000-4-2 Level 4, ESD Contact Discharge test. The
Air-Gap Discharge test involves approaching the device
with a charged probe. The Contact Discharge method
connects the probe to the device before the probe is
energized.
Maxim Integrated │ 13
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
Functional Diagram
FORWARD DIRECTION
BUS
HVBUS
IEC
SCR
CLAMP
LV ESD
CLAMP
SHORT
TO
GROUND
FORWARD
CURRENT
DETECTION
UNDERVOLTAGE
LOCKOUT
OVP (SHORTTO-BATTERY
AND/OR
SHORTTO-VHVBUS)
CONTROL
FAULT
EN
IN
LV
ESD
CLAMP
THERMAL
SHUTDOWN
D+
HVD+
IEC
SCR
CLAMP
D-
HVDIEC
SCR
CLAMP
MAX20042F
MAX20043F
MAX20044F
GND
RC
1MΩ
CHARGE-CURRENTLIMIT RESISTOR
HIGHVOLTAGE
DC
SOURCE
CS
100pF
RD
1500Ω
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Figure 8. Human Body ESD Test Model
www.maximintegrated.com
IP 100%
90%
IR
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
AMPERES
DEVICE
UNDER
TEST
36.8%
10%
0
0
tRL
TIME
tDL
CURRENT WAVEFORM
Figure 9. Human Body Current Waveform
Maxim Integrated │ 14
MAX20042F–MAX20044F
CHARGE-CURRENTLIMIT RESISTOR
HIGHVOLTAGE
DC
SOURCE
CS
150pF
RD
330Ω
I
100%
90%
DISCHARGE
RESISTANCE
IPEAK
RC
50MΩ TO 100MΩ
Automotive Hi-Speed USB 2.0 Protectors
DEVICE
UNDER
TEST
STORAGE
CAPACITOR
10%
30ns
tr = 0.7ns TO 1ns
Figure 10. IEC 61000-4-2 ESD Test Model
t
60ns
Figure 11. IEC 61000-4-2 ESD Generator Current Waveform
Ordering Information
CURRENT RATING (A) (typ)
OTG SUPPORT
PIN-PACKAGE
MAX20042FGEEA/V+
PART
0.65
No
16 QSOP
MAX20042FGEEB/V+
0.65
Yes
16 QSOP
MAX20043FGEEA/V+
1.0
No
16 QSOP
MAX20043FGEEB/V+
1.0
Yes
16 QSOP
MAX20044FGEEA/V+
1.3
No
16 QSOP
MAX20044FGEEB/V+
1.3
Yes
16 QSOP
Note: All devices are specified over the -40°C to +105°C operating temperature range.
/V denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Chip Information
PROCESS: BiCMOS
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Package Information
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
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
16 QSOP
E16+12C
21-0055
90-0167
Maxim Integrated │ 15
MAX20042F–MAX20044F
Automotive Hi-Speed USB 2.0 Protectors
Revision History
REVISION
NUMBER
REVISION
DATE
0
1/17
DESCRIPTION
Initial release
PAGES
CHANGED
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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
© 2017 Maxim Integrated Products, Inc. │ 16
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