Overview

Features and Benefits

  • Dual 10A or Single 20A Output
  • Wide Input Voltage Range: 4.5V to 20V
    • 2.375VMIN with CPWR Bias
  • Output Voltage Range: 0.6V to 5.5V
  • ±1.5% Maximum Total DC Output Error
  • Multiphase Current Sharing
  • Differential Remote Sense Amplifier, Each Channel
  • Current Mode Control/Fast Transient Response
  • Up to 96% Efficiency
  • Adjustable Switching Frequency (250kHz to 1.3MHz)
  • Frequency Synchronization
  • Overcurrent Foldback Protection
  • Output Overvoltage Protection
  • Internal or External Compensation
  • Built-In Temperature Monitoring Diode
  • SnPb or RoHS Compliant Finish
  • 11.25mm × 15mm × 5.01mm BGA Package

Product Details

The LTM4646 is a complete dual 10A output switching mode DC/DC power supply. Included in the package are the switching controller, power FETs, inductors, and all supporting components. Operating from an input voltage range of 4.5V to 20V, the LTM4646 supports two outputs each with an output voltage range of 0.6V to 5.5V, set by external resistors. Its high efficiency design delivers up to 10A continuous current for each output. Only a few input and output capacitors are needed.

The device supports frequency synchronization, multiphase operation, high efficiency light load operation and output voltage tracking for supply rail sequencing and has an on-board temperature diode per channel for device temperature monitoring. High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability.

Fault protection features include overvoltage and overcurrent protection. The power module is offered in a small footprint 11.25mm × 15mm × 5.01mm BGA package. The LTM4646 is available with SnPb or RoHS compliant terminal finish.

Applications

  • Point-of-Load Power Supplies
  • Telecom and Networking Equipment
  • Industrial Equipment
  • Medical Equipment

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Tools & Simulations

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.

LTspice

Models for the following parts are available in LTspice:

LTM4646

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

LTPowerCAD

Design tools for the following parts are available in LTpowerCAD:

LTM4646

Product Recommendations

LTM4646 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

Discussions

LTM4646 Discussions

RE: LTM4646 Multiphase Operation
10 week(s) ago in Power By Linear
LTM4646 Multiphase Operation
10 week(s) ago in Power By Linear
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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