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PMP31291

27W inverting buck-boost reference design

PMP31291

Design files

Overview

This reference design is a flexible and compact power supply providing a negative output voltage rail. The design includes a LM70880-Q1 device (a 80V, 8A high efficiency buck converter). The output voltage value can be selected among three predefined settings: - 7 V / -10 V / -11 V.

Features
  • Negative output voltage
  • Selectable output voltage(-7 V to  -11 V)
  • High-efficiency conversion due to use of synchronous rectification
  • Level shifters for enable and power good signals
  • Design was built and tested 
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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
TIDT386.PDF (1104 K)

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

TIDMCV0.PDF (231 K)

Detailed schematic diagram for design layout and components

TIDMCV1.PDF (156 K)

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

TIDMCV2.PDF (200 K)

Detailed overview of design layout for component placement

TIDMCV4.ZIP (1134 K)

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

TIDCGO6.ZIP (498 K)

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

TIDMCV3.PDF (811 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)

LM70880-Q1Automotive, high-density, 4.5-V to 80-V input, 8-A low-EMI synchronous DC/DC step-down converter

Data sheet: PDF | HTML
MOSFETs

CSD87502Q230-V, N channel NexFET™ power MOSFET, dual SON 2 mm x 2, 42 mOhm, gate ESD protection

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report 27W Inverting Buck Boost Reference Design PDF | HTML Apr. 17, 2024

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