Power Sequencing Reference Design Using Load Switches


Design files


The TIDA-01584 reference design demonstrates various power sequencing configurations using load switches. By using integrated load switches, the timing of each voltage rail can be adjusted independently. Each voltage rail can be controlled without extensive processor intervention or external digital components. This design is useful in applications such as multi-function printers (MFPs) and set-top box (STB), where specific timing sequences are required to turn on various subsystems and processor rails.

  • Three different Power Sequencing configurations: CT Configuration, QOD configuration, and independent GPIO configuration
  • Adjustible timing thresholds using CT and QOD pins
  • Pin-to-pin footprints allow for swapping between multiple load switches for different voltage, current, and Ron requirements
  • Load switches offer smaller solution size and lower component count when compared to Discrete MOSFET solutions
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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.

TIDUDM8.PDF (1740 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


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

TIDCE98.ZIP (489 K)

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.

Load switches

TPS2281018-V, 3-A, 79-mΩ load switch with adj. rise time and adj. output discharge

Data sheet: PDF | HTML
Load switches

TPS229175.5-V, 2-A, 80-mΩ , 10-nA leakage load switch adj. rise time and adj output discharge

Data sheet: PDF | HTML
Load switches

TPS229185.5-V, 2-A, 52-mΩ load switch with adj. rise time and adj. output discharge

Data sheet: PDF | HTML
Load switches

TPS229755.7-V, 6-A, 16-mΩ load switch with adj. rise time, optional output discharge, and thermal shutdown

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Power Sequencing Reference Design Using Load Switches Dec. 15, 2017
Technical article How and why you should use load switches for power sequencing PDF | HTML Feb. 06, 2018

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