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TIPA-050073

F29x power-supply design using the TPS653860-Q1 for safety-relevant applications

Design files

TIPA-050073

Design files

Overview

This power design can be used as a guide for integrating the TPS65386x-Q1 Power Management IC (PMIC) into safety-relevant automotive systems powering the functional safety (FuSa) F29x C2000™ microcontroller (MCU).

Features
  • Outlines the power tree design needed to support the F29x MCU
  • Provides integrated 3.3V and 5V linear regulators
  • Includes buck-boost preregulator stage for external buck converter to power VCORE
  • Provides support for controlling external peripherals through GPIO pins, such as the enable pin of the TPS62903-Q1 buck converter
  • Provides support for watchdog and error signal monitoring (ESM) to help achieve safety requirements
  • Optional integrated linear regulators for powering peripherals such as sensors and interfaces
  • Optional diagnostics pin for internal signal monitoring and redundancy
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

download Design guide — TIPA-050073
PDF | HTML
SLVAFX2.PDF (249 KB)

Reference design overview and verified performance test data

Products

Includes TI products in the design and potential alternatives.

DC/DC converters

TPS62903-Q1 — Automotive, 3-V to 18-V, 3-A low-IQ synchronous buck converter with 165°C junction temperature

Data sheet: PDF | HTML
Multi-channel ICs (PMICs)

TPS653860-Q1 — Automotive 2.3-V to 36-V, 2.8-A power management IC (PMIC) for safety-relevant applications

Data sheet: PDF | HTML
Real-time digital power MCUs

F29H850TU — C2000™ 64-bit MCU with C29x 200MHz tri-core, lockstep, functional safety compliance, 4MB

Data sheet: PDF | HTML

Technical documentation

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* Design guide F29x Power-Supply Design Using the TPS653860-Q1 for Safety-Relevant Applications PDF | HTML Dec 9, 2025

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