PMP22670

24-V to 36-V Input, 3.3-V output synchronous buck converter reference design

PMP22670

Design files

Overview

This reference design demonstrates a single-phase buck converter with integrated FETs and small size. The design accepts an input voltage from 24 Vin to 36 Vin and provides a regulated 3.3-V output up to 1-A continuous and 1.2-A peak. Two revisions of the board have been designed and manufactured in order to compare the EMI and thermal performance between the two PCB layouts. Both versions of the boards use the same circuitry.

Features
  • 2.1-MHz switching frequency avoids AM band
  • Regulator includes integrated FETs
  • Optimized for automotive applications
  • Regulator features spread-spectrum switching (dithering) for improved EMI performance
Output voltage options PMP22670.1
Vin (Min) (V) 24
Vin (Max) (V) 36
Vout (Nom) (V) 3.3
Iout (Max) (A) 1
Output Power (W) 3.3
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Integrated Switch
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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
TIDT234.PDF (1558 K)

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

TIDMB28.PDF (257 K)

Detailed schematic diagram for design layout and components

TIDMB29.PDF (297 K)

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

TIDMB30.ZIP (230 K)

Detailed overview of design layout for component placement

TIDMB32.ZIP (1329 K)

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

TIDCGB6.ZIP (980 K)

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

TIDMB31.ZIP (988 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

Technical documentation

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Type Title Date
Test report 24-V to 36-V Input, 3.3-V Output Synchronous Buck Converter Reference Design PDF | HTML Nov. 14, 2022

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