High-Current Low-Noise Parallel LDO Reference Design
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Key Document


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.

  • 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)

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS7A85  4-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS7A85 Download Download

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Technical Documents

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Datasheet (1)
Title Type Size (KB) Date
PDF 2674 05 Feb 2016
Application notes (1)
Title Type Size (KB) Date
PDF 48 28 Jul 2006
User guides (2)
Title Type Size (KB) Date
PDF 9051 01 Aug 2017
PDF 1875 25 Jun 2014
Design files (6)
Title Type Size (KB) Date
ZIP 790 30 Aug 2017
ZIP 658 30 Aug 2017
PDF 659 30 Aug 2017
PDF 160 30 Aug 2017
PDF 61 30 Aug 2017
PDF 182 30 Aug 2017
Related Tools & Software

Reference Designs  ( 1 )

Name Part Number Tool Type
Current-Sharing Dual LDOs  TIDA-00270  TI Designs

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