Low-Dropout (LDO), High-Current, and No-Bias Rail Reference Design for Industrial Applications
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Key Document


TI Design TIDA-01322 demonstrates a low-noise, low-dropout (LDO), high-current power stage with no voltage-bias-rail requirement utilizing the LP5922 LDO linear regulator. The power stage demonstrated is ideal for industrial applications. Within industrial applications, low-noise power is often achieved by introducing an LDO at the point-of-load to clean up voltage ripple from a previous switching regulator power stage. The LP5922 device makes this possible in an efficient manner by supporting very low dropout, which also eliminates any need for a voltage bias at its input.

  • Low dropout (LDO) allows up to 80% high system efficiency
  • Two high-current outputs
  • High 70-dB PSRR
  • Low-Noise (26-µVRMS) output for sensitive devices
  • Low quiescent current, 25 mA at no load

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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 (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM26420  Dual 2 A, high-efficiency synchronous DC/DC converter  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LP5922  2-A adjustable LDO  Power management  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM26420 Download Download
Download Download
LP5922 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1582 17 Jan 2017
Design files (6)
Title Type Size (KB) Date
ZIP 972 17 Mar 2017
ZIP 1194 17 Mar 2017
PDF 460 17 Mar 2017
PDF 97 17 Mar 2017
PDF 62 17 Mar 2017
PDF 172 17 Mar 2017

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