3-V to 4.5-V Input, 400-mA, –12-V Inverting Buck-Boost Reference Design
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical documentation

Support & Training

Order Now

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Key Document


This small and simple inverting power reference design features a high accuracy step-down converter in an inverting buck-boost topology. It generates a -12-V output at 400 mA of current from a 3-V to 4.5-V input voltage, enabling to cleanly power negative voltage rails in space-constrained applications such as optical networking systems for telecom infrastructure, active and distributed antenna systems or remote radio unit for wireless infrastructure, as well as for test and measurement applications in industrial.

  • High Negative Output Voltage of –12 V
  • Total Solution Size Less Than 65mm2
  • High Output Current of 400mA
  • Low Output Voltage Ripple (<0.5 %)
  • Input Voltage Range of 3 V to 4.5 V
  • 125°C Rated Solution

See the Important Notice and Disclaimer covering reference designs and other TI resources.


Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Test Data

Get results faster with test and simulation data that's been verified.

Download Test Data

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files

(Output Voltage 1)
Vin (Min) (V)3
Vin (Max) (V)4.5
Vout (Nom) (V)-12
Iout (Max) (A).4
Output Power (W)4.8
Input TypeDC
TopologyBuck Boost- Inverting

TI Devices (1)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS62136  3-17V 4.0A Step-Down Converter with 1% accuracy and PFM/Forced-PWM in 2x3QFN  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS62136 Download Download

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Technical documentation

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guide (1)
Title Type Size (KB) Date
PDF 2425 18 Jun 2017
Design files (5)
Title Type Size (KB) Date
ZIP 307 18 Jul 2017
PDF 342 18 Jul 2017
PDF 71 18 Jul 2017
PDF 60 18 Jul 2017
PDF 115 18 Jul 2017

Support & training

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

If you have questions about quality, packaging, or ordering TI products visit our Support page.

Technical articles