TIDA-01553

Automotive Off-battery VCM Supporting 2.5-V Cold Crank Profile Reference Design

TIDA-01553

Design files

Overview

This reference design is a high-current, wide input voltage range circuit that can handle engine cold crank profile down to 2.5V. The dual-output voltages are 5V and 3.3V that support up to 10A for each output. The design is suitable for an automotive off-battery infotainment application that needs to support a very stringent starting profile down to 2.5V.

Features

Wide input voltage range of 2.5V to 40V
Dual high-current synchronous outputs: 5V, up to 10A; 3.3V, up to 10A
Continuous operation during engine crank transient down to 2.5V
Reverse battery protection with zero IQ smart diode controller
Minimized AM radio band interference

Automotive

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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

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Design guide — TIDA-01553

TIDUDR1.PDF (949 K)

Reference design overview and verified performance test data

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Schematic — TIDA-01553

TIDRVJ2.PDF (323 K)

Detailed schematic diagram for design layout and components

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Bill of materials (BOM) — TIDA-01553

TIDRVJ3.PDF (62 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

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Assembly drawing — TIDA-01553

TIDRVJ4.PDF (257 K)

Detailed overview of design layout for component placement

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CAD/CAE symbol — TIDA-01553

TIDRVJ6.ZIP (1354 K)

Files used for 3D models or 2D drawings of IC components

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Gerber file — TIDA-01553

TIDCEH4.ZIP (1631 K)

Design file that contains information on physical board layer of design PCB

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PCB layout — TIDA-01553

TIDRVJ5.PDF (1402 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

LM25122-Q1 — 3-42-V wide VIN, synchronous boost controller with multiphase capability, AEC-Q100 qualified

Data sheet: PDF | HTML

AC/DC & DC/DC controllers (external FET)

LM5140-Q1 — Wide Vin Dual 2.2MHz low Iq Synchronous Buck Controller

Data sheet: PDF | HTML

Ideal diode/ORing controllers

LM74700-Q1 — 3.2-V to 65-V, 80-uA IQ automotive ideal diode controller

Data sheet: PDF | HTML

Start development

Software

Calculation tool

LM5140ADESIGN-CALC — LM5140 Dual Synchronous Buck Controller Design Tool - Quick Start Calculator

Welcome to the LM5140-1 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC synchronous buck converter based on the LM5140-Q1 current-mode controller. As such, the user can expeditiously arrive at an optimized design to meet (...)

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Supported products & hardware

Products

AC/DC & DC/DC controllers (external FET)

LM5140-Q1 — Wide Vin Dual 2.2MHz low Iq Synchronous Buck Controller

Hardware development

Evaluation board

LM5140RWGEVM — LM5140RWGEVM Dual Synchronous Buck Converter EVM

LM5140RWGEVMHD — LM5140QRWGRQ1 Dual Synchronous Buck Converter High Density Evaluation Module (EVM)

Software

Calculation tool

LM5140ADESIGN-CALC — Quick Start Calculator for the LM5140-Q1

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LM5140ADESIGN-CALC — LM5140 Dual Synchronous Buck Controller Design Tool - Quick Start Calculator

Latest version

Version: 01.00.00.0D

Release date: 31 Oct 2019

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LM5140 Dual Synchronous Buck Controller Design Tool - Quick Start Calculator (zip) — 2018 K

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Products

AC/DC & DC/DC controllers (external FET)

LM5140-Q1 — Wide Vin Dual 2.2MHz low Iq Synchronous Buck Controller

Hardware development

Evaluation board

LM5140RWGEVM — LM5140RWGEVM Dual Synchronous Buck Converter EVM

LM5140RWGEVMHD — LM5140QRWGRQ1 Dual Synchronous Buck Converter High Density Evaluation Module (EVM)

Software

Calculation tool

LM5140ADESIGN-CALC — Quick Start Calculator for the LM5140-Q1

Technical documentation

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	Type	Title		Date
*	Design guide	Automotive Off-Battery VCM, Supporting 2.5-V Cold Crank Profile Reference Design		Jan. 30, 2018

Related design resources

Hardware development

EVALUATION BOARD

AUTOCRANKSIM-EVM — Simulator for automotive cranking pulses evaluation module

Reference designs

REFERENCE DESIGN

PMP7233 — Cranking Simulator Reference Design for Automotive Applications

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