12V Input 3W Dual 5V Output Buck Regulator Reference Design


Design files


This supply uses the TPS54160 buck regulator to generate a 5V/0.5A regulated output and an auxilliary 5V/0.2A unregulated output.  A two winding coupled inductor is used to generate the auxilliary output.   The auxilliary output is left floating, and could be used as a -5V output or as a second +5V output.  This simple design results in an efficient, yet low cost solution for a dual output system.  The peak efficiency is over 88%.

Output voltage options PMP9091.1 PMP9091.2
Vin (Min) (V) 10 10
Vin (Max) (V) 14 14
Vout (Nom) (V) 5 -5
Iout (Max) (A) .5 .2
Output Power (W) 2.5 1
Isolated/Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC
Topology Buck- Non Sync Buck- Non Sync
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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.

SLVU996.PDF (1560 K)

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

SLVRB87.PDF (104 K)

Detailed schematic diagram for design layout and components

SLVRB88.PDF (78 K)

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

SLVC542.ZIP (175 K)

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

SLVU997.PDF (156 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS541603.5V to 60V Input, 1.5A Step-Down Converter with Eco-Mode

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP9091 Test Results Oct. 22, 2013

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