Current-Sharing Dual LDOs

(ACTIVE) TIDA-00270

Description & Features

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Description

This power supply topology is capable of sourcing 6A via two LDOs operating in parallel. The solution sources current evenly between the two TPS74401’s, each capable of supplying 3A. This design allows for higher currents to be supplied than is typically possible with a single LDO. It also allows for additional heat syncing not available with an individual LDO.

Features
  • Sources up to 6A
  • High PSRR to filter ripple
  • Low Noise output to provide a clean rail
  • Low dropout regulation
  • High Accuracy (1% over temperature)
  • Soft-start allows for monotonic startup

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  



Schematic/Block Diagram

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Test Data

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Design Files

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Bill of Materials (BOM)

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
OPA333  1.8V, 17µA, microPower, Precision, Zero-Drift CMOS Op Amp   Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TPS74401  Single-Output LDO, 3A, Adj (0.8V to 3.3V), Fast Transient Response, Programmable Soft Start  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
OPA333 Download Download
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TPS74401 Download -
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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 1875 25 Jun 2014 7
Selection guides (1)
Title Abstract Type Size (KB) Date Views
PDF 9699 22 Mar 2017 155
Design files (3)
Title Abstract Type Size (KB) Date Views
ZIP 2109 27 Aug 2014 4
PDF 196 27 Aug 2014 0
PDF 113 27 Aug 2014 6

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