Three Different Buck Converter Circuits to Convert 12V to 1.2V at >6A Load Current Reference Design


Design files


PMP11438 is a vehicle used to compare three different power solutions for converting a 12V bus to 1.2V at 6-10A. The 1.2V output voltage is applicable to DDR4 memory applications. Each solution offers an advantage in either full load efficiency, light load efficiency, density, height, transient response, or some combination of these.

  • Two 1.2V/10A power converters and one 1.2V/6A converter
  • Switched-capacitor buck converter, multi-phase buck converter, and single POL buck converter
  • Light-Load efficiency available in all solutions
  • Solutions with sub 2mm height
  • On-board transient testers for controlled, high slew rate transient loads
Output voltage options PMP11438.1 PMP11438.2 PMP11438.3
Vin (Min) (V) 10.8 10.8 10.8
Vin (Max) (V) 13.2 13.2 13.2
Vout (Nom) (V) 1.2 1.2 1.2
Iout (Max) (A) 10 6 10
Output Power (W) 12 7.2 12
Isolated/Non-Isolated Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC DC
Topology Buck- Multiphase^Buck- Synchronous Buck- Multiphase^Buck- Synchronous 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

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TIDUBQ9.PDF (2582 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


Detailed overview of design layout for component placement

TIDCC39.ZIP (413 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)

TPS535151.5-V to 18-V, 12-A synchronous SWIFT™ buck converter

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

TPS54A20Small, 10-MHz, 8-V to 14-V, 10-A synchronous SWIFT™ series capacitor buck converter

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

TPS621844-V to 17-V, 6-A synchronous buck converter with power good, 1% accuracy, and adjustable soft start

Data sheet: PDF | HTML
N-channel MOSFETs

CSD16410Q5A25-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 12 mOhm

Data sheet: PDF

Technical documentation

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Type Title Date
* Test report PMP11438 Test Results Apr. 21, 2016
White paper Breakthrough power delivery for space-constrained applications May 13, 2016

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