Wide Vin Low Noise Triple Output Step Down Converter Reference Design


Design files


The reference design PMP9462 is a single input step-down converter with three low-noise outputs. The module uses LM43603, a synchronous step-down DC-DC converter capable of driving up to 3A of load current from an input voltage ranging 7V to 36V. The 5V output from LM43603 enables the LM26420 which further steps down this voltage to produce 1.8V and 2.5V outputs, capable of driving 1A load current each. This power supply is suitable for applications that require multiple outputs from a single input DC voltage. It provides good regulation performance over an input voltage range of 7V to 36V.

  • 7V to 36V Vin, 5V Vout @2A, 1.8V@1.5A and 2.5V@1.5A
  • 15W Pout for factory automation needs
  • Switching frequency 500kHz
  • 4 layer board
  • Meets CISPR 22 class B conducted emisison
  • Solution size 1" x 2.5"
Output voltage options PMP9462.1
Vin (Min) (V) 3.5
Vin (Max) (V) 7
Vout (Nom) (V) 28
Iout (Max) (A) 3
Output Power (W) 84
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.

TIDU505.PDF (2804 K)

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

TIDRA69.PDF (99 K)

Detailed schematic diagram for design layout and components

TIDRA70.PDF (60 K)

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

TIDRA71.PDF (62 K)

Detailed overview of design layout for component placement

TIDRA72.ZIP (507 K)

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

TIDC576.ZIP (198 K)

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

TIDRA73.PDF (309 K)

PCB layer plot file used for generating PCB design layout

TIDRA75.PDF (326 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

LM26420Dual 2 A, high-efficiency synchronous DC/DC converter

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

LM436033.5V to 36V, 3A Synchronous Step-Down Voltage Converter

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
More literature SIMPLE SWITCHER Synchronous Regulator Series (Rev. B) Feb. 08, 2016
Test report PMP9462 Test Results Aug. 25, 2014

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