Automotive EMI and thermally optimized synchronous buck converter reference design
PMP21795
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

Description

This reference design is an EMI and thermally optimized synchronous buck converter for automotive applications. The circuit is powered from the nominal 12-V battery to provide an output voltage of 3.3 V at 8 A. The design uses a synchronous buck controller operating at a switching frequency of 440 kHz. Forced pulse width modulation or diode emulation mode is jumper selectable. Frequency dithering is used to improve the EMI performance.

Features
  • EMI and thermally optimized for improved system performance
  • 440 kHz switching frequency, which is below the AM band
  • Jumper selectable diode emulation or forced PWM
  • Selectable frequency dithering improves EMI performance
  • Compact power stage and controller layout for small solution size

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


  



Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Design Guide

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

Download Design Guide

Design Files

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

Download Design Files


Parametrics
 PMP21795.1
(Output Voltage 1)
Vin (Min) (V)4.5
Vin (Max) (V)20
Vout (Nom) (V)3.3
Iout (Max) (A)8
Output Power (W)26.4
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBuck- Synchronous

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
LM5141-Q1  Wide-Input 2.2MHz Low-Iq Synchronous Buck Controller  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5141-Q1 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 guides (1)
Title Type Size (KB) Date
PDF 2001 21 Dec 2018
Design files (6)
Title Type Size (KB) Date
ZIP 525 21 Dec 2018
ZIP 1031 21 Dec 2018
PDF 1083 21 Dec 2018
PDF 134 21 Dec 2018
PDF 101 21 Dec 2018
PDF 199 21 Dec 2018

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