High-Efficiency Low Vin 30W Boost Converter for Automotive Applications (E-Call) Reference Design
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Key Document


PMP9382 is a low Vin boost converter utilizing the automotive grade LM3478Q-Q1 controller. This design starts at a diode drop above the minimum input voltage of 2.97V (~3.4V) to a maximum of 6V in.  Once the power supply is enabled and output is present, this design will work down to 2V input minimum, supplying an output voltage of 10V at 3A. The Switching frequency is set to 400 kHz.

  • Low Vin operation at 2V minimum
  • 10V @ 3A, 30W output power
  • 2-layer cost effective solution with automotive grade LM3478Q-Q1 boost controller
  • High power efficiency with 94% peak
  • IC Powered from output once running eliminates the need to a boost bias supply
  • This circuit board is tested, and the design files and test report are included.

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Design Files

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(Output Voltage 1)
Vin (Min) (V)2
Vin (Max) (V)6
Vout (Nom) (V)10
Iout (Max) (A)3
Output Power (W)30
Input TypeDC
TopologyBoost- Non Sync

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD16323Q3  25-V, N channel NexFET™ power MOSFET, single SON 3 mm x 3 mm, 5.5 mOhm  MOSFETs  Sample & Buy Not Available
LM3478Q-Q1  40-V wide VIN low-side N-channel controller for switching regulators with 10-µA shutdown current  Step-up (boost) regulators  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD16323Q3 VSON-CLIP (DQG)| 8 Download Download
LM3478Q-Q1 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1365 04 May 2015
Design files (6)
Title Type Size (KB) Date
ZIP 202 04 May 2015
ZIP 363 04 May 2015
PDF 437 04 May 2015
PDF 72 04 May 2015
PDF 103 04 May 2015
PDF 123 04 May 2015

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