Set Top Box Power Solution


Design files


This reference design is an example of power-trees inside a set-top-box. It performs DC-DC conversions, from 12V supply, for 1.0V/1.2V/1.8V/2.5V/3.3V/5V rails.

  • Provides 6 power rails: 1.0V/2.7A, 1.0V/0.6A, 1.2V/0.7A, 1.8V/0.4A, 2.5V/1.6A, 3.3V/4A, and 5V/0.5A
  • Best for a Set Top Box with 12V AC-adaptor
  • Demonstrates delay circuits to achieve power on timing/sequencing
  • Peak efficiency over 95%
  • Very compact PCB design
  • This design is tested and ready to be used in any Set Top Box design.


Output voltage options PMP6638.1
Vin (Min) (V) 10
Vin (Max) (V) 14
Vout (Nom) (V) 3.3
Iout (Max) (A) 3.4
Output Power (W) 11.22
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous

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.

SLVU518.PDF (3402 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more


Detailed schematic diagram for design layout and components


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

TIDC131.ZIP (350 K)

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


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS542274.5 V to 18 V input, 2 A synchronous step-down converter in HSOP and VSON package

Data sheet document-pdfAcrobat PDF open-in-new HTML
Buck converters (integrated switch)

TPS543274.5V to 18V Input, 3-A Synchronous Step-Down Converter

Data sheet document-pdfAcrobat PDF open-in-new HTML
Buck converters (integrated switch)

TPS544254.5V to 18V Input, 4A Synchronous Step-Down Converter

Data sheet document-pdfAcrobat PDF

Technical documentation

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Type Title Date
Test report PMP6638 Test Results Sep. 16, 2013

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