TIDA-01232

High-Current Low-Noise Parallel LDO Reference Design

TIDA-01232

Design files

Overview

This parallel low-dropout (LDO) reference design showcases the TPS7A85 low-noise LDO linear regulator in a parallel configuration, which is capable of sourcing 3.5 A per LDO or 7 A per board. Additional design flexibility includes the ability to stack this design to meet the current requirements of an application.

Features
  • Output current: up to 7 A per board (two TPS7A85 LDOs per board)
  • Low-dropout (LDO) voltage: 200 mV (typ)
  • Low-noise output: 3.33 μVRMS (10 Hz to 100 kHz for one LDO) when paralleling eight LDOs
  • High output accuracy: 1% (over line, load, and temperature)
Communications equipment

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.

TIDUCS7.PDF (9051 K)

Reference design overview and verified performance test data

TIDU421.PDF (1875 K)

Reference design overview and verified performance test data

TIDRSI3.PDF (182 K)

Detailed schematic diagram for design layout and components

TIDRSI4.PDF (61 K)

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

TIDRSI5.PDF (160 K)

Detailed overview of design layout for component placement

TIDRSI7.ZIP (658 K)

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

TIDCDS8.ZIP (790 K)

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

TIDRSI6.PDF (659 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Linear & low-dropout (LDO) regulators

TPS7A83002-A, low-VIN, low-2-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good wi

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS7A83A2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS7A843-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS7A84A3-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS7A854-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS7A85A4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide High-Current, Low-Noise Parallel LDO Reference Design Aug. 01, 2017
Design guide 6A Current-Sharing Dual LDO (TIDA-00270 Verified Design) Jun. 25, 2014
Application note Ballast Resistors Allow Load Sharing Between Two Paralleled DC/DC Converters Jul. 28, 2006

Related design resources

Reference designs

REFERENCE DESIGN
TIDA-00270 Current-Sharing Dual LDOs

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