2.2MHz Switching, Synchronous Split Supply Reference Design for 12V Battery with all Protections


Design files


PMP10651 is a low noise, multi-output SMPS design where LM53603 is used in Inverting Buck-Boost Fly buck topology to generate positive and negative supply needed in multiple noise sensitive applications such as powering High Speed Video Amplifier, RF amplifier, Precision Low noise amplifier etc.   The design accepts an input voltage of 7Vin to 15 Vin DC (from 12V Lead Acid Battery) and provides outputs of +12V@500mA, -12v@500mA, 5V @400mA and 3.3V@150mA. It features a small size and is an inexpensive and more efficient solution to using Flyback or Pushpull converters .

  • High Frequency Bipolar Supply design using inexpensive coupled inductor
  • Weighted feedback for both the output to attain good regulation
  • Positive output can be lower than , in between or higher than Vin range
  • Low Vin Support for Single as well as Dual Li ion Battery support
  • LMZ integrated  module is used to generate 5V
  • High PSRR LDOs are used for Bipolar outputs
Output voltage options PMP10651.1 PMP10651.2 PMP10651.3 PMP10651.4
Vin (Min) (V) 9 9 9 5
Vin (Max) (V) 15 15 15 5
Vout (Nom) (V) -12 12 5 3.3
Iout (Max) (A) .5 .5 .3 .15
Output Power (W) 6 6 1.5 .495
Isolated/Non-Isolated Non-Isolated Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC DC DC
Topology Buck- Synchronous FlyBuck Boost- Integrated Switch Linear Regulator
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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TIDUAE4.PDF (3649 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Design file that contains information on physical board layer of design PCB


Includes TI products in the design and potential alternatives.

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Buck converters (integrated switch)

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Buck converters (integrated switch)

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Buck modules (integrated inductor)

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Linear & low-dropout (LDO) regulators

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Linear & low-dropout (LDO) regulators

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Linear & low-dropout (LDO) regulators

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Shunt voltage references

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Technical documentation

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Type Title Date
* Test report PMP10651 Test Results Aug. 10, 2015

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