Automotive low voltage boost stage converts 4V…9Vin to 9Vout@3.3A Reference Design
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This small boost converter is meant to increase the output voltage to 9V during cranking phase. Vin = Vout - Vf in nominal conditions. During cranking, the input voltage can reach vaules as low as 4V. Extensive testing with a source generator has been performed.

  • Supports the highly demanding cranking profile by stable 9Vout@3.3A
  • High efficiency down to 6Vin: 93%
  • Low noise generation thank to LC filter

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(Output Voltage 1)
Vin (Min) (V)4
Vin (Max) (V)40
Vout (Nom) (V)9
Iout (Max) (A)3.3
Output Power (W)29.7
Input TypeDC
TopologyBoost- Non Sync

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18534Q5A  60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 9.8 mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
LM3481  2.97V to 48V High-Efficiency Controller for Boost, SEPIC and Flyback  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18534Q5A VSONP (DQJ)| 8 Download
LM3481 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 883 13 Apr 2015
Design files (5)
Title Type Size (KB) Date
ZIP 187 13 Apr 2015
ZIP 324 13 Apr 2015
PDF 71 13 Apr 2015
PDF 105 13 Apr 2015
PDF 140 13 Apr 2015

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