Dual-Phase Synchronous Buck Converter for Automotive Audio Reference Design
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Key Document


PMP20440 is a dual phase synchronous buck converter reference design for 12V output at 11A from an input voltage of 6V to 17V. At an input voltage of 12V or less the output will follow with a small voltage drop. This design uses the LM5140-Q1 dual phase synchronous buck controller at a free-running switching frequency of 440 kHz. Features include external frequency synchronization, enable and power good.

  • 132W continuous output power
  • 97% typical efficiency
  • Very low dropout
  • Power good flag
  • Synchronizable to external clock

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Design Files

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(Output Voltage 1)
Vin (Min) (V)6
Vin (Max) (V)17
Vout (Nom) (V)12
Iout (Max) (A)11
Output Power (W)132
Input TypeDC
TopologyBuck- Multiphase

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5140-Q1  Wide Vin Dual 2.2MHz low Iq Synchronous Buck Controller  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
LMC7101Q-Q1  Tiny automotive low power operational amplifier with rail-to-rail input and output  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5140-Q1 Download Download
LMC7101Q-Q1 Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 3030 07 Dec 2017
Design files (6)
Title Type Size (KB) Date
ZIP 492 07 Dec 2017
ZIP 658 07 Dec 2017
PDF 1022 07 Dec 2017
PDF 187 07 Dec 2017
PDF 33 07 Dec 2017
PDF 213 07 Dec 2017

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