PMP8903 Reference Design

Texas Instruments

Automotive Range SEPIC Converter Delivers 4.5V@5.5A Reference Design


In today’s start-stop systems: it is common for battery voltages to dip well below the nominal 12V rating. PMP8903 represents a very common start-stop application where that battery voltage can drop as low as 5V: and a 5V output is still needed for CAN and also as an intermediate bus. This design also features two tiny synchronous low-voltage buck regulators generating 3.3V and 1.1V from the 5V intermediate rail: contributing to an overall solution size that is very compact for space-constrained automotive environments. For an additional output voltage version of the design: see PMP8903.2

  • 100% duty cycle capability5V to 42V Input5V output at 3.25A (LM3481 output)1.1V output at 2A (TLV62065)3.3V output at 1A (TLV62065)This example design is supported with design and test files
Product Categories
  • Power management


Part Number Name Companion Part
LM3481 LM3481 Buy Datasheet
TLV62065 TLV62065 Buy Datasheet

Bill Of Materials

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Download the schematic for PMP8903

Test Data

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Other Documents

Title Updated Type Size (KB)
PMP8903 Gerber 12 Jul 2013 ZIP 315
PMP8903 PCB 22 May 2013 PDF 316
PMP8903 BOM 22 May 2013 PDF 191
PMP8903 Schematic 22 May 2013 PDF 32