LTM4740

RECOMMENDED FOR NEW DESIGNS

15VIN, Single 15A Step-Down μModule Regulator with PMBus

Data Sheet (Rev. 0) Product Selection Table
Viewing:

Overview

  • Complete Solution in <1cm2 (Single-Sided PCB) or 0.5cm2 (Dual-Sided PCB)
  • PMBus Telemetry of Output Current, Output Voltage, Input Voltage, and Junction Temperature
  • Pin-to-Pin Compatible with LTM4739
  • Input Voltage Range: 3V to 15V
  • Output Voltage Range: 0.4V to 5.5V
  • Adjustable Reference Voltage: 0.4V to 0.8V (Default 0.5V)
  • 90% Full-Load Efficiency from 12VIN to 1.5VOUT at 15A
  • ±1% Maximum DC Output Error Over Temperature
  • Wide Frequency Range: 500kHz to 2MHz
  • Internal Compensation
  • Power Good Indicator
  • Constant Frequency Peak Current Mode Control
  • Differential Remote Sense
  • Single-Phase Point-of-Load Operation
  • 49-Lead 6.25mm × 6.25mm × 5.07mm BGA Package
LTM4740
15VIN, Single 15A Step-Down μModule Regulator with PMBus
LTM4740 Typical Application LTM4740 Efficiency LTM4740 Pin Configuration LTM4740 Chip Illustration
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

User Guide 2

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTM4740
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
EVAL-LTM4740-AZ

LTM4740: 15VIN, Single 15A Step-Down μModule Regulator with PMBus

Buy Now View Details

Features and Benefits

  • Complete Single-Phase Point-of-Load (POL) Solution.
  • 87.8% Full-Load Efficiency from 12VIN to 1VOUT at 15A.
  • PMBus Telemetry of Output Current, Reference Voltage, Input Voltage, and Junction Temperature.

Product Details

The EVAL-LTM4740-AZ evaluation board features the LTM®4740: a complete, high-efficiency, high-power-density, single 15A DC-to-DC step-down power μModule® (micromodule) regulator with power management bus (PMBus) interface. The LTM4740 is available in a 49-lead 6.25mm × 6.25mm × 5.07mm ball grid array (BGA) package. Read the LTM4740 data sheet before using or making any hardware changes to the EVAL-LTM4740-AZ evaluation board.

The EVAL-LTM4740-AZ input voltage range is 3V to 15V, and the output voltage range is 0.4V to 5.5V. The maximum load current is 15A. The output voltage is adjusted through the feedback resistor divider or the PMBus VOUT_COMMAND (the factory default output voltage is 1V). The switching frequency range is 500kHz to 2MHz (factory default frequency is 500kHz), configured through the pin-strap resistor at the PGM1 or with PMBus commands. The resistor value at the PGM1 pin is also used to adjust the control loop compensation parameters. The resistor value at the PGM0 pin is used to configure the positive overcurrent (POC) protection triggering level and the factory-default PMBus address (0x39h). The factory default POC protection sets the peak inductor current limit to 20A. At a high ambient temperature, the current output may need to be derated (refer to the LTM4740 data sheet for more details).

The onboard 12-pin connector, the I2C/PMBus/System management bus (SMBus) DC1613A dongle controller, and the LTpowerPlay® development tool provide an easy way to communicate and program the EVAL-LTM4740-AZ evaluation board.
EVAL-LTM4740-AZ
LTM4740: 15VIN, Single 15A Step-Down μModule Regulator with PMBus
EVAL-LTM4740-AZ Evaluation Board Angel View EVAL-LTM4740-AZ Evaluation Board Top View EVAL-LTM4740-AZ Evaluation Board Bottom View

Latest Discussions

1 Weeks Ago
undefined
View related discussion on EngineerZone®

Recently Viewed