Overview

Features and Benefits

  • Quad Output Step-Down µModule Regulator with 1.2A per Output Channel
  • Wide Input Voltage Range: 2.7V to 17V
  • 0.6V to 5.5V Output Voltage
  • 1.2A DC, Parallelable, Output Current Each Channel
  • ±1.5% Total Output Voltage Regulation
  • 100% Duty Cycle Operation
  • Current Mode Control, Fast Transient Response
  • External Frequency Synchronization
  • Selectable Burst Mode® Operation
  • Power Good Indicator
  • Over Voltage, Current and Temperature Protection
  • 6.25mm x 6.25mm x 2.1mm BGA Package
  • Pin Compatible with LTM4668 (0.6V to 1.8V Output, 1MHz).

Product Details

The LTM4668A is a quad DC/DC step-down µModule (micromodule) regulator with 1.2A DC current per output. Outputs can be paralleled in an array for up to 4.8A capability. Included in the package are the switching controllers, power FETs, inductors and support components. Operating over an input voltage range of 2.7V to 17V, the LTM4668A supports an output voltage range of 0.6V to 5.5V. Only bulk input and output capacitors are needed. The device supports frequency synchronization, PolyPhase operation, selectable Burst Mode operation, 100% duty cycle and low IQ operation. Its high switching frequency and a current mode architecture enables a very fast transient response to line and load changes without sacrificing stability.

Fault protection features include overvoltage, overcurrent and overtemperature protection. The power module is offered in a space saving and thermally enhanced 6.25mm × 6.25mm × 2.1mm BGA package. The LTM4668A is available with SnPb (BGA) or RoHS compliant terminal finish.

Applications

  • Telecom, Networking and Industrial Equipment
  • Multi-Rail Point of Load Regulation
  • FPGAs, DSPs and ASICs Application

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.

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:

LTM4668

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:

LTM4668
LTM4668A
LTM4668APARALLEL
LTM4668PARALLEL

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

LTM4668A Discussions

RE: INTVcc voltage for LTM4668A
1 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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