Inverting Buck-Boost Converter With Variable Output Voltage Reference Design
PMP15026
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Key Document

Description

This reference design uses the 60V, 3.5A LM76003 synchronous buck converter in an inverting buck-boost configuration to generate a variable negative output voltage. Dynamic variation of the output voltage allows use in applications requiring different output voltages without having to make component changes on the board.  The design features a large ground plane to dissipate heat and improve thermal performance, while tightly coupled capacitors keep critical signal loops tight.

Features
  • 6 V to 42 Vin, -5 V to -15 Vout  3.5A Iout
  • Peak efficiency 92%
  • Switching frequency 500 KHz
  • 4 Layer Board
  • Copper thickness: 2oz, 1oz, 1oz, 2oz

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Schematic/Block Diagram

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Design Files

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Parametrics
 PMP15026
(Output Voltage 1)
Vin (Min) (V)3.5
Vin (Max) (V)45
Vout (V)-15
Iout (Max) (A)1.5
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBuck Boost- Synchronous
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Part Number Status Vin  (Min)  (V)   Vin  (Max)  (V)   Vout  (V)   Iout  (Max)  (A)   Isolated/Non-Isolated   Input Type   Topology  

PMP15026:
Inverting Buck-Boost Converter With Variable Output Voltage Reference Design

ACTIVE 3.5   45   -15   1.5   Non-Isolated   DC   Buck Boost- Synchronous  

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM76003  3.5V to 60V, 3.5A 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)
LM76003 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 2410 28 Mar 2018
Design files (6)
Title Type Size (KB) Date
ZIP 538 28 Mar 2018
ZIP 807 28 Mar 2018
PDF 691 28 Mar 2018
ZIP 692 28 Mar 2018
PDF 26 28 Mar 2018
PDF 76 28 Mar 2018

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