40V Dual 1A Power Module w/Low Noise LDOs Split-Rail (±5V) Output Voltages Reference Design


Design files


The PMP8372 design is optimized for small size and uses the TPS84250 step-down power module on the top- side with the TPS84259 negative output power module on the bottom-side to implement both positive and negative output voltages from a 12V/24V source. The output voltages can be adjusted from +/-3V to +/-15V with resistor changes. The design is capable of 1-A outputs. The positive-input TPS7A4700 LDO and negative-input TPS7A3301 LDO are included for a low noise, high PSRR solution that is ideal for powering bipolar amplifiers, data converters, or other noise-sensitive analog circuitry.

  • Wide input Voltage range from 7V to 40V
  • Dual output voltages can be adjusted from +/-3V to +/-15V, which are capable of 1A outputs
  • High PSRR LDOs: Positive output 80dB PSRR @ 100Hz and Negative output 72dB PSRR @ 100KHz
  • Positive output noise: 7μVrms (10Hz, 100kHz), Negative output noise: 30μVrms (10Hz, 100kHz)
  • Ultra Low noise for powering bipolar amplifier, data converter, or other noise-sensitive analog circuitry

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.

SLVU784.PDF (1652 K)

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


Detailed schematic diagram for design layout and components

SLVRB00A.PDF (203 K)

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

SLVC451.ZIP (421 K)

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

SLVU785.PDF (25 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck modules (integrated inductor)

TPS842507V to 50V, 2.5A Step-Down Integrated Power Solution

Data sheet: PDF
Buck-boost & inverting modules (integrated inductor)

TPS842594.5V to 40V, 2A up to 15W Negative-Output Integrated Power Solution

Data sheet: PDF
Linear & low-dropout (LDO) regulators

TPS7A331-A, high-PSRR, negative, adjustable low-dropout voltage regulator with enable

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS7A471-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP8372 Test Results Sep. 21, 2012

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