Wide Vin Low Noise Triple Output Step Down Converter Reference Design
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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"

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(Output Voltage 1)
Vin (Min) (V)3.5
Vin (Max) (V)7
Vout (Nom) (V)28
Iout (Max) (A)3
Output Power (W)84
Input TypeDC
TopologyBuck- Synchronous

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM26420  Dual 2 A, high-efficiency synchronous DC/DC converter  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LM43603  3.5V to 36V, 3A Synchronous Step-Down Voltage Converter  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM26420 Download Download
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LM43603 Download Download
Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 2745 25 Aug 2014
Design files (7)
Title Type Size (KB) Date
PDF 326 25 Aug 2014
PDF 309 25 Aug 2014
ZIP 198 25 Aug 2014
ZIP 507 25 Aug 2014
PDF 62 25 Aug 2014
PDF 60 25 Aug 2014
PDF 99 25 Aug 2014
More literature (1)
Title Type Size (KB) Date
PDF 1139 08 Feb 2016

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