Four-output synchronous buck reference design for automotive telematics control units
PMP21939
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 uses an LM63635-Q1 synchronous buck converter to output either a 3.3-V or 5-V rail. The bus converter switches at 2.1 MHz, and the load converters (TPS62810-Q1) switch at 2.2 MHz. The system is designed for telematics control unit power. Easily configurable jumpers allow users to enable and disable the bus converter, load converters and load switches for up to 3-A maximum load at each output. 

Features
  • 12-V input, bus converter with selectable 3.3-V or 5-V outputs
  • Four selectable load switch outputs with 3-A maximum load
  • All switching converters operate above 2 MHz to avoid AM band
  • Very good output ripple with and without load (<1%)
  • Built for easy testability using configurable jumpers and test points

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
 PMP21939.1
(Output Voltage 1)
PMP21939.2
(Output Voltage 2)
PMP21939.3
(Output Voltage 3)
PMP21939.4
(Output Voltage 4)
PMP21939.5
(Output Voltage 5)
Vin (Min) (V)63.353.33.3
Vin (Max) (V)165555
Vout (Nom) (V)3.33.33.31.81.1
Iout (Max) (A)2.85.4.51.52.5
Output Power (W)9.4051.321.652.72.75
Isolated/Non-IsolatedNon-IsolatedNon-IsolatedNon-IsolatedNon-IsolatedNon-Isolated
Input TypeDCDCDCDCDC
TopologyBuck- SynchronousOtherBuck- SynchronousBuck- SynchronousBuck- Synchronous

TI Devices (4)

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
LM63635-Q1  3.5-V to 32-V, 3.25-A step-down voltage converter with spread spectrum  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
LSF0101  Single bi-directional multi-voltage level translator  Voltage level translators  Sample & Buy View Design Kits & Evaluation Modules
TPS22968-Q1  2-ch, 5.5-V, 4-A, 27-mΩ, automotive load switch with adj. rise time and output discharge  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS62810-Q1  Automotive 2.75-V to 6-V, 4-A step-down converter in a 2mm x 3mm wettable-flanks QFN package  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM63635-Q1 Download
Download
LSF0101 Download Download
Download -
TPS22968-Q1 Download
TPS62810-Q1 VQFN-HR (RWY)| 9 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 2784 11 Oct 2019
Design files (6)
Title Type Size (KB) Date
ZIP 2336 11 Oct 2019
ZIP 1104 11 Oct 2019
PDF 1227 11 Oct 2019
PDF 182 11 Oct 2019
PDF 201 11 Oct 2019
PDF 360 11 Oct 2019

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