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


Design files


This reference design 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. 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.

  • 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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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.

TIDUCS8.PDF (1582 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement

TIDRQB8.ZIP (1194 K)

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


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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Linear & low-dropout (LDO) regulators

LP59222-A adjustable LDO

Data sheet: PDF | HTML
Buck converters (integrated switch)

LM26420Dual 2 A, high-efficiency synchronous DC/DC converter

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide LDO With Low Dropout, High Current and No Bias Rail Design Guide Jan. 17, 2017

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