3- to 7-VIN, Space-grade point-of-load (POL) reference design with redundant eFuse inputs for OCP


Design files


Redundancy is often employed in spacecraft applications to enhance reliability, this reference design shows how redundancy can be implemented at the input of a Point-of-Load (POL) supply using two TPS7H2201-SP radiation hardened eFuse load switches. Using two load switches allows for a primary and redundant voltage to be supplied to the rad hardened POL step-down converter TPS50601A-SP, Applications the load switch provides an adjustable over-current protection (OCP) limit for protection along with a current sense ouput pin allows for monitoring and protection, the load switch also features adjustable over-voltage protection (OVP). The POL converter also has a current limit providing additional protection to shorts.

  • Adjustable over-current protection (OCP) limit
  • Adjustable over-voltage (OVP) limit
  • Redundant inputs
  • Configurable soft start
  • Enable/disable functionality
Output voltage options TIDA-070001.1
Vin (Min) (V) 3
Vin (Max) (V) 7
Vout (Nom) (V) 2.5
Iout (Max) (A) 6
Output Power (W) 15
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous
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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.


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

TIDRYC1.ZIP (1985 K)

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

TIDCF57.ZIP (1272 K)

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

TIDRYC0.ZIP (1714 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS50601A-SPRadiation-hardened QMLV, 3-V to 7-V input, 6-A synchronous step-down converter

Data sheet: PDF | HTML
eFuses & hot swap controllers

TPS7H2201-SPRadiation-hardened, QMLV and QMLP 1.5-V to 7-V input 6-A eFuse

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide 3- to 7-VIN, Space-Grade POL Reference Design with Redundant eFuse Inputs (Rev. A) Jul. 30, 2019

Related design resources

Hardware development

TPS50601ASPEVM-S TPS50601A-SP single-operation evaluation module TPS7H2201EVM-CVAL TPS7H2201-SP evaluation module for 1.5-V to 7-V input, 6-A load switch and eFuse

Reference designs

PMP8904 TPS50601SPEVM MINI POL Reference Design TIDA-070002 20- to 40-VIN, 50-W Space-grade isolated flyback DC/DC over-current protection reference design TIDA-070005 3- to 7-VIN, 24-A IOUT, 0.95-VOUT, Space-grade current sharing point-of-load (POL) reference design

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