USB Car Charger with 2MHz Buck Converter, Cable Compensation and Battery Protection Reference Design
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Key Document


The PMP40040 reference design is a single channel USB charger for automotive applications. It includes a high switching frequency buck converter which can minimize the size of power components and reduce the system's cost. It includes built-in short-to-battery protection, IEC ESD protection features enhance the system's reliability significantly in automotive application. This design can also handle a 2.1A load current. Its output port supports the USB BC1.2 CDP charging protocol.

  • Linear VBUS droop compensation
  • Short-to-battery protection on protected VBUS, DP_IN and DM_IN pins
  • IEC ESD protection on DP_IN/DM_IN
  • USB BC1.2 CDP charging protocol supported
  • High switching frequency up to 2.1MHz

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(Output Voltage 1)
Vin (Min) (V)6.5
Vin (Max) (V)36
Vout (Nom) (V)5
Iout (Max) (A)2.1
Output Power (W)10.5
Input TypeDC
TopologyBuck- Synchronous

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LMR23625  SIMPLE SWITCHER®, 36V 2.5A Synchronous Step-Down Converter  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS254900-Q1  Automotive USB Charge port controller with short to BATT protection and droop compensation  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LMR23625 Download Download
Download Download
TPS254900-Q1 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 488 03 Nov 2016
Design files (6)
Title Type Size (KB) Date
ZIP 382 03 Nov 2016
ZIP 28 03 Nov 2016
PDF 701 03 Nov 2016
PDF 89 03 Nov 2016
PDF 80 03 Nov 2016
PDF 61 03 Nov 2016
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
USB Type-C™ DFP 5V3A Charger Reference Design  PMP11594  Reference design 

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