TIDA-01423

3-V to 4.5-V Input, 400-mA, –12-V Inverting Buck-Boost Reference Design

TIDA-01423

Design files

Overview

This small and simple inverting power reference design features a high accuracy step-down converter in an inverting buck-boost topology. It generates a -12-V output at 400 mA of current from a 3-V to 4.5-V input voltage, enabling to cleanly power negative voltage rails in space-constrained applications such as optical networking systems for telecom infrastructure, active and distributed antenna systems or remote radio unit for wireless infrastructure, as well as for test and measurement applications in industrial.

Features
  • High Negative Output Voltage of –12 V
  • Total Solution Size Less Than 65mm2
  • High Output Current of 400mA
  • Low Output Voltage Ripple (<0.5 %)
  • Input Voltage Range of 3 V to 4.5 V
  • 125°C Rated Solution
Output voltage options TIDA-01423.1
Vin (Min) (V) 3
Vin (Max) (V) 4.5
Vout (Nom) (V) -12
Iout (Max) (A) .4
Output Power (W) 4.8
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck Boost- Inverting
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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.

TIDUCY3.PDF (2425 K)

Reference design overview and verified performance test data

TIDRRV9.PDF (115 K)

Detailed schematic diagram for design layout and components

TIDRRW0.PDF (60 K)

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

TIDRRW1.PDF (71 K)

Detailed overview of design layout for component placement

TIDCDN8.ZIP (307 K)

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

TIDRRW2.PDF (342 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS621363-17V 4.0A Step-Down Converter with 1% accuracy and PFM/Forced-PWM in 2x3QFN

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide 3.-0-V to 4.5-V Input, 400-mA, –12-V Inverting Buck-Boost Reference Design Jun. 18, 2017
Technical article How to modify a step-down converter to the inverting buck-boost topology PDF | HTML May 17, 2018

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