PMP31245

Automotive microcontroller power reference design with pre-boost and 10.6-W output power

PMP31245

Design files

Overview

This reference design provides 5 V, 3.3 V and 1.0 V for powering an automotive microcontroller using three buck converters with a pre-boost converter. The pre-boost regulator can provide 1.25-A continuous output current at 8.5 V from a 3.2-V input voltage. The purpose of this design is to fit the buck solution within a small board area, using mainly single-sided component placement.

Features
  • Designed for small PCB area
  • Single side population possible
  • Design can be adapted for other voltage requirements
  • Discrete power tree allows better board space usage
Output voltage options PMP31245.1 PMP31245.2 PMP31245.3 PMP31245.4
Vin (Min) (V) 5 5 8.5 3.2
Vin (Max) (V) 5 5 36 36
Vout (Nom) (V) 1 3.3 5 8.5
Iout (Max) (A) 4 1 2 1.25
Output Power (W) 4 3.3 10 10.625
Isolated/Non-Isolated Non-Isolated Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC DC DC
Topology Buck- Synchronous Buck- Synchronous Buck- Synchronous Boost- Non Sync
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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.

PDF | HTML
TIDT335.PDF (551 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDMBM5.PDF (364 K)

Detailed schematic diagram for design layout and components

TIDMBM6.PDF (284 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDMBM7.PDF (293 K)

Detailed overview of design layout for component placement

TIDMBM9.ZIP (1641 K)

Files used for 3D models or 2D drawings of IC components

TIDCGF4.ZIP (175 K)

Design file that contains information on physical board layer of design PCB

TIDMBM8.PDF (1183 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

LMR43620-Q1Automotive, 3-V to 36-V, 2-A low-EMI synchronous buck regulator with low IQ

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

TPS62810-Q1Automotive 2.75-V to 6-V, 4-A step-down converter in a 2mm x 3mm wettable-flanks QFN package

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

TPS628501-Q1Automotive 2.7V-to-6V 1A step-down converter in SOT-583 package

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report Discrete Power Tree Reference Design forAutomotive MCU PDF | HTML Jul. 17, 2023

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