Small Negative Bias Supply for Low Noise Applications Reference Design
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Key Document


This circuit reference design is realized in Cuk Topology. The output voltage is -12V / -15V. The output current of 200mA is possible over an input voltage range of 10V to 60V  (even with a low input voltage of 6V 140mA output current is possible).  The perfect switching behavior of the circuit results in lowest radiated emissions.

  • Cost effective (LM5001, TLV271)
  • Suitable for audio
  • Despite Cuk topology, excellent dynamic behavior
  • Lowest ripple at input and output
  • Transient response on a 50% load step is only 1%
  • The circuit reference design is built and tested

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Schematic/Block Diagram

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Design Guide

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Design Files

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(Output Voltage 1)
Vin (Min) (V)10
Vin (Max) (V)60
Vout (Nom) (V)-12
Iout (Max) (A).2
Output Power (W)2.4
Input TypeDC

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5001  3.1-75V Wide Vin, 1A Current Mode Non-Synchronous Switch Mode Regulator  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
TLV271  Single 16V, 3MHz, 550-uA/ch, rail-to-rail output op amp  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5001 Download Download
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TLV271 Download Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1235 17 Nov 2017
Design files (6)
Title Type Size (KB) Date
ZIP 22 17 Nov 2017
ZIP 421 17 Nov 2017
PDF 316 17 Nov 2017
PDF 66 17 Nov 2017
PDF 79 17 Nov 2017
PDF 84 17 Nov 2017

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