2D_048_015A Data Sheet
2D_048_015A 48V 15W DC-DC Converter
The Helix Semiconductors MuxCapacitor®
2D_048_015A is a member of the MxC® 200
family of monolithic configurable high
voltage switch capacitor DC-DC converters
targeted for use in both non-isolated and
isolated, buck or boost converter
applications. The 2D_048_015A supports
seamless interface to low voltage PoL
regulators to provide highly efficient DC-DC
converter solutions with 24V to 57V input
voltages for regulated or non-regulated PoL
solutions.
Consisting of three unique
capacitive conversion stages, each capable
of providing a separate output voltage, the
2D_048_015A can easily be configured to
support systems with multiple voltage
requirements. Intelligent timing & control
optimize power delivery efficiency from noload to maximum power.
Applications
•
•
•
•
•
Features
•
•
•
•
•
•
•
•
PoE: Wireless Access Points, Security
Cameras, VoIP Phones
IoT & IIoT Gateways
Electric & Hybrid Automobiles
Industrial Controllers, HVAC
Telecom, Data Center Functions
48V to 6V Input/Output Voltage
o 3-stage MuxCap™, G=1/2 each
o Up to 57V Input Voltage
o Up to 3 outputs
Up to 15W Output
o Pout = Pout1 + Pout2 + Pout3
Idle Operation: Active, No-Load
o 1mW Non-Switching
o 48mW Switching
48V to 12V peak efficiency of >97%
o > 90% Efficiency @ 15W
Maximizes PoL regulator efficiency
Fault Detection
o Output Over Current
o Thermal Shutdown
Evaluation Boards, Reference Designs
o Voltage Buck
o Unregulated and Regulated
Package Options
o 32 pin QFN, 5mm x 5mm
o Wire Bond Die
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2D_048_015A Data Sheet
Table of Contents
1
2
3
4
5
5.1
5.2
5.3
5.4
5.5
6
7
7.1
7.2
8
Pin Configuration and Description ........................................................................................................ 3
Absolute Maximum Ratings .................................................................................................................. 5
Recommended Operating Conditions................................................................................................... 5
Electrical Specifications......................................................................................................................... 6
Functional Description .......................................................................................................................... 9
MuxCapacitor Voltage Divider .............................................................................................................. 9
Low Drop-Out Voltage Regulator ........................................................................................................ 10
Under-Voltage Lockout and POR ........................................................................................................ 10
Clock Generator .................................................................................................................................. 10
Thermal Shutdown.............................................................................................................................. 10
Reference System Application ............................................................................................................ 11
Package Drawings ............................................................................................................................... 13
QFN32 Package .................................................................................................................................. 13
Wire-bond Die .................................................................................................................................... 13
Ordering Information .......................................................................................................................... 14
Table of Tables
Table 1: 2D_048_015A Pin Assignments ...................................................................................................... 3
Table 2: 2D_048_015A Absolute Maximum Ratings .................................................................................... 5
Table 3: 2D_048_015A Recommended Operating Conditions ..................................................................... 5
Table 4: 2D_048_015A Electrical Characteristics.......................................................................................... 6
Table 5: 2D_048_015A Ordering Information ............................................................................................ 14
Table 6: Revision History ............................................................................................................................. 15
Table of Figures
Figure 1: 2D_048_015A QFN32 Pinout ......................................................................................................... 3
Figure 2: VOUT1, VOU2, VOUT3 Efficiency ................................................................................................... 7
Figure 3: VOUT vs Frequency Efficiency........................................................................................................ 7
Figure 4: 2D_048_015A Block Diagram ........................................................................................................ 8
Figure 5: 2D_048_015A Functional Block Diagram....................................................................................... 9
Figure 6: 2D_048_015A Application Schematic .......................................................................................... 12
Figure 7: 2D_048_015A QFN32 Package Drawing ...................................................................................... 13
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2D_048_015A Data Sheet
1
Pin Configuration and Description
Figure 1: 2D_048_015A QFN32 Pinout
Table 1: 2D_048_015A Pin Assignments
Pin No.
1
3
Name
VIN1
EN
5
VDD
6
7
GND
VOUTLDO
8
VINLDO
11
RT
12
EXTCLKSEL
13
EXTCLK
Description
MuxCapacitor 1: DC input voltage supply pin
Device Enable: Input Pin, Internal 2MΩ Pull-Down, 60Vmax
0 = Disable, 1 = Enable
Pre-Regulator: Output supply voltage pin
Attach 0.1µF capacitor from VDD pin to GND
GND for internal reference and analog circuitry
LDO: 5V Analog Output pin
Attach 4.7µF capacitor from VOUTLDO pin to GND
LDO: Input supply voltage pin
Connect VINLDO pin to VOUT1
Charge Pump Frequency: Input Pin
Add external resistor from RT pin to GND.
External Clock Sync Enable: Input Pin, Internal 2MΩ Pull-Down,
30Vmax
0 = Internal Clock, 1 = External Clock
External Clock Sync: Input pin, Internal 2MΩ Pull-Down
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2D_048_015A Data Sheet
16
17
18
PGND3
CFLY3B
VOUT3
19
20
24
25
26
CFLY3T
VIN3
PGND2
CFLY2B
VOUT2
27
28
29
30
31
CFLY2T
VIN2
PGND1
CFLY1B
VOUT1
32
2,4,9,10,
14,15,21,
22,23
CFLY1T
NC
Thermal Pad
Power GND
MuxCapacitor 3: Bottom of flying capacitor
MuxCapacitor 3: Output Pin
Attach output capacitor from VOUT3 to PGND3.
MuxCapacitor 3: Top of flying capacitor
MuxCapacitor 3: DC input voltage supply pin
Power GND
MuxCapacitor 2: Bottom of flying capacitor
MuxCapacitor 2: Output Pin
Attach output capacitor from VOUT2 to PGND2.
MuxCapacitor 2: Top of flying capacitor
MuxCapacitor 2: DC input voltage supply pin
Power GND
MuxCapacitor 1: Bottom of flying capacitor
MuxCapacitor 1: Output Pin
Attach output capacitor from VOUT1 to PGND1.
MuxCapacitor 1: Top of flying capacitor
No Connect
Power GND
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2D_048_015A Data Sheet
2
Absolute Maximum Ratings
The 2D_048_015A can be exposed to the following extremes without permanent damage to device
operation. Performance is not guaranteed at these extremes. Continuous operation at these
extremes reduces long term reliability.
Table 2: 2D_048_015A Absolute Maximum Ratings
Pin
VIN1, EN
VIN2, VIN3
VINLDO
EXTCLK
VOUTLDO, VDD, EXTCLKSEL, RT
GND to PGND
ESD Voltage: Human Body Model
ESD Voltage: Charge coupled Model
ESD Voltage: Machine Model
Storage temperature
Junction Temperature
3
Min
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-40
-40
Max
62
31
15
30
6
0.3
2
500
200
125
125
Unit
V
V
V
V
V
V
kV
V
V
°C
°C
Recommended Operating Conditions
The 2D_048_015A chip is designed to operate within the design limits specified in the Parametric
Specifications when the conditions of the following table are not exceeded.
Table 3: 2D_048_015A Recommended Operating Conditions
Definition
Input Voltage
Output Power
EN
EXTCLK
EXTCLKSEL, RT
Junction Temperature
Min
20
0
0
0
0
-40
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5
Max
57
15
57
29
5.5
125
Unit
V
W
V
V
V
°C
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2D_048_015A Data Sheet
4
Electrical Specifications
The electrical characteristics of the Helix Semiconductors 2D_048_015A is tested according to the
following criteria:
Unless otherwise stated, these specifications apply over:
20V < VIN1 < 57V, 10V < VIN2 & VIN3 < 28.5V,
4.5V < VOUTLDO < 5.5, Fsw=100kHz, -40·C < TJ < 85͘͘ ·C.
Notes:
1. Min and Max values are valid over Operating Conditions, unless otherwise stated.
2. Typ values are valid at typical Operating Conditions and typical process Parameters.
3. Guaranteed by Design.
Table 4: 2D_048_015A Electrical Characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Unit
0.65
V
A
mΩ
1
300
V
A
mΩ
5
V
60V MuxCapacitor Voltage Divider: VIN1/VOUT1
Vout
Iout
Rsw
Output Voltage
Output Current
Switch Rdson
VIN=48V, Po=0W, Note 3.
Note 3.
24
600
30V MuxCapacitor Voltage Divider: VIN2/VOUT2 and VIN3/VOUT3
Vout
Iout
Rsw
Output Voltage
Output Current
Switch Rdson
VIN=24V, Po=0W, Note 3.
Note 3.
12
VOUTLDO
VoutLDO
Output Voltage
Under Voltage Lockout
UVVoutS+
UVVoutSEN+
EN1
VOUTLDO Start
VOUTLDO Stop
Enable On Thresh.
Enable Off Thresh.
5V Rising Trip Level
5V Falling Trip Level
Enable Rising Trip Level
Enable Falling Trip Level
4.4
4.1
1.14
0.95
4.6
4.2
1.2
1.0
4.8
4.3
1.26
1.05
V
V
V
V
95
230
kHz
Clock Generator
Fsw
Switching Frequency RT=402KΩ,95kHz
RT=174KΩ, 220kHz
Thermal Shutdown
TSD
Hyst
Thermal Shutdown
Hysteresis
Note 3.
Note 3.
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145
20
°C
°C
3.4.19
2D_048_015A Data Sheet
Figure 2: VOUT1, VOUT2, VOUT3 Efficiency
Vout1, Vout2, Vout3 Overlay Efficiency vs
Load Current
100.0
Efficiency (%)
95.0
Vout1
90.0
85.0
Vout2
Vout3
80.0
75.0
70.0
65.0
0
0.2
0.4
0.6
0.8
1
1.2
1.4
ILoad (A)
Figure 3: VOUT vs Frequency Efficiency
Efficiency (%)
MuxCap2//3 @ 100kHz & 200kHz
Efficiency vs Load Current
97.0
96.0
95.0
94.0
93.0
92.0
91.0
90.0
89.0
88.0
87.0
86.0
100kHz
200kHz
0
0.5
1
1.5
2
ILoad (A)
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2D_048_015A Data Sheet
Figure 4: 2D_048_015A Block Diagram
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2D_048_015A Data Sheet
5
Functional Description
The Helix Semiconductors 2D_048_015A DC-DC MuxCapacitor IC is an easy to use, highly efficient DC
voltage divider. It combines three MuxCapacitor Voltage Dividers to reduce the input voltage
allowing the use of lower voltage / lower cost PoL regulators.
Figure 5: 2D_048_015A Functional Block Diagram
Each MuxCapacitor stage has its own input and output pins allowing for multiple configurations. All
three stages can be connected in series for access to intermediate voltage reduction outputs. Or, the
MuxCapacitor stages can be wired in parallel for added output current capability and efficiency.
5.1
MuxCapacitor Voltage Divider
The 2D_048_015A Muxcapacitor Voltage Dividers (MCVD) divide the DC voltage present at the VIN1
pin to reduced voltages at the VOUT1, VOUT2, and VOUT3 pins which provides the input voltage to
an external POL regulator.
The MCVD is comprised of three stages, each with a gain of ½.
Each MCVD uses an external flying capacitor, an internal switching circuit, and an external hold
capacitor. The switching device is configured to operate the corresponding voltage reduction circuit
at charging and discharging phases from a two-phase non-overlapping on-chip clock generator.
Each MuxCapacitor contains over-current protection. The over-current protection automatically
resets once the over-current condition clears. This feature is active at startup enhancing the softstart ramp-up at each VOUTx.
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2D_048_015A Data Sheet
5.2
Low Drop-Out Voltage Regulator
An integrated 5V LDO provides the supply voltage for the analog circuits. The 5V LDO is powered
from the VINLDO pin. The VINLDO supply voltage range is 7-15V.
The 5V LDO uses the bandgap output as the reference voltage to generate the desired output voltage.
5.3
Under-Voltage Lockout and POR
The integrated under-voltage lockout circuit monitors the voltages at the 5V LDO output, and the
Enable pin. It ensures that the MuxCapacitor outputs remain in the off state whenever one of these
signals drop below the set thresholds. Normal operation resumes once these signals rise above their
thresholds. The Power-On Ready (POR) signal is generated when each signal reaches their valid logic
level. When the POR is asserted the Soft-Start sequence starts. All the UVLO comparators except the
enable circuit are disabled when enable is low to achieve the ultra-low power dissipation.
5.4
Clock Generator
The integrated clock generator’s switching frequency is programmed with an external resistor (402KΩ
typical) connected from the RT pin to GND. The MuxCapacitor switching frequency (Fsw) is calculated
as:
Fsw (kHz) = 38,190 / External RT Resistor (Kohms)
This clock signal can be synchronized to an external clock by using the EXTCLK pin. Switching activity
at the EXTCLK pin enables the internal synchronizer. When the synchronizer is enabled (EXTCLKSEL
= 1), the MuxCapacitor clock will track the EXTCLK pin switching rate. As the EXTCLK pin frequency
slows down, the MuxCapacitor clock slows down. The EXTCLK signal is derived from the external
POL’s switch drive signal. This allows the MuxCapacitors to save power as the external switcher slows
down due to reduced load demand. The MuxCapacitor switching frequency is ¼ the EXTCLK
frequency.
5.5
Thermal Shutdown
Temperature sensing is included and provides the signal to an over temperature detector. The trip
threshold is set to 145͘͘·C. When trip threshold is exceeded, thermal shutdown turns off the
MuxCapacitor outputs and resets the internal soft start.
The restart is automatically initiated when the sensed temperature drops down within the normal
operating range. A 20·C hysteresis is incorporated into the thermal shutdown threshold. The thermal
shutdown circuit is disabled when enable is low to achieve the ultra-low power dissipation.
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2D_048_015A Data Sheet
6
Reference System Application
The following system diagrams provide 15W application schematics. The 2D_048_015A is first shown
as a simple DC-DC voltage reduction circuit. Each MuxCapacitor stage performs a G=1/2 voltage
reduction. Additionally, each MuxCapacitor output can be tapped to provide an intermediate
voltage. While the total power drawn from the 2D_048_015A cannot exceed 15W where Pout =
Pout1 + Pout2 + Pout3, each MuxCapacitor cell has a maximum output current. The Iout_max for
VOUT1 cannot exceed 0.5A. The Iout_max for VOUT2 and VOUT3 cannot exceed 1A individually.
Efficiency and delivered power are dependent on application circuit implementation, capacitor
components, RT frequency and thermal management. Consult the factory for additional design
information.
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2D_048_015A Data Sheet
Figure 6: 2D_048_015A Application Schematic
MxC 290-EB9-C
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3.4.19
2D_048_015A Data Sheet
7
Package Drawings
The available packages for the 2D_048_015A are shown in the following drawings.
7.1
QFN32 Package
The 2D_048_015A is packaged in a 32-pin 5mm x 5mm QFN package as shown below.
Figure 7: 2D_048_015A QFN32 Package Drawing
7.2
Wire-bond Die
The 2D_048_015A is available in die form. Please contact factory for information regarding die
sales.
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3.4.19
2D_048_015A Data Sheet
8
Ordering Information
Refer to the following table for package option ordering information.
Table 5: 2D_048_015A Ordering Information
Part Number
2D-048-015A-QFN32-C
2D-048-015A-WD-C
MxC 290-EB9-C
Description
32 pin 5mm x 5mm QFN
Wire Bond Die
9-Pin Three Output Evaluation Board
Package
QFN
Die
Eval Board
This product is covered by one or more Helix Semiconductors patents.
Patent http://www.helixsemiconductors.com/pages/company/trademarksandpatents
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3.4.19
2D_048_015A Data Sheet
Table 6: Revision History
Date
1.30.19
2.2.19
3.4.19
Revision
1
2
3
Description
Initial release
Miscellaneous edits
Patent disclosure
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