LTM4604A

PRODUCTION

Low Voltage, 4A DC/DC μModule (Power Module) Regulator with Tracking

Data Sheet (Rev. D) Product Selection Table
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Overview

  • Complete Standalone Power Supply
  • ±1.75% Max Total DC Output Error (–40°C to 125°C)
  • Wide Input Voltage Range: 2.375V to 5.5V
  • 4A DC, 5A Peak Output Current
  • 0.8V to 5V Output
  • Output Voltage Tracking
  • UltraFastTM Transient Response
  • Power Good Indicator
  • Current Mode Control
  • Current Foldback Protection, Parallel/Current Sharing
  • Up to 95% Efficiency
  • Programmable Soft-Start
  • Micropower Shutdown: IQ ≤ 7μA
  • Overtemperature Protection
  • 9mm × 15mm × 2.32mm LGA and
    9mm × 15mm × 3.42mm BGA Packages

The LTM4604A is a complete 4A switch mode step-down μModule® (power module) regulator with ±1.75% maximum total output voltage error. Included in the package are the switching controller, power FETs, inductor and all support components. Operating over an input voltage range of 2.375V to 5.5V, the LTM4604A supports an output voltage range of 0.8V to 5V, set by a single resistor. This high efficiency design delivers up to 4A continuous current (5A peak). Only input and output capacitors are needed to complete the design.

The 0.630mm LGA pads with 1.27mm pitch simplify PCB layout by providing standard trace routing and via placement. (The LTM4604A has smaller pads than the LTM4604). The low profile package enables utilization of unused space on the bottom of PC boards for high density point of load regulation. 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 foldback current protection, thermal shutdown and a programmable soft-start function. The LTM4604A is offered with SnPb (BGA) or RoHS-compliant terminal finish.

  Notes
LTM4604 -
LTM4604A Smaller pad sizes provide more distance between adjacent pads therefore there is less chance of solder paste or solder spreading outside the pad area

Applications

  • Telecom and Networking Equipment
  • Servers
  • Storage Cards
  • ATCA Cards
  • Industrial Equipment
LTM4604A
Low Voltage, 4A DC/DC μModule (Power Module) Regulator with Tracking
LTM4604A Application Circuit LTM4604A Pin Configuration
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Documentation

Data Sheet 1

User Guide 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Power System Management (PSM) & Sequencers 1
LTC2974
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Protection Switches & Controllers 1
LTC4370
RECOMMENDED FOR NEW DESIGNS Two-Supply Diode-OR Current Balancing Controller
Switching Regulators & Controllers 2
LTC3880
RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
LTM4624
RECOMMENDED FOR NEW DESIGNS 14VIN, 4A Step-Down DC/DC μModule (Power Module) Regulator
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTM4604
  • LTM4604A
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
DC1392A

LTM4604AEV Demo Board | 2.375 ≤ VIN ≤ 5.5V, VOUT = 1.2V/1.5V/1.8V/2.5V/3.3V @ 4A

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Product Details

Demonstration circuit 1392A features the LTM4604AEV, the high efficiency, high density switch mode step-down μModule® regulator. The input voltage range is from 2.375V to 5.5V with a jumper selectable output voltage from 0.8V to 3.3V. The rated load current is 4A, while derating is necessary for certain VIN, VOUT and thermal conditions. By using the TRACK pin, the output can be set to coincidentally or ratiometrically track to another voltage rail.
DC1392A
LTM4604AEV Demo Board | 2.375 ≤ VIN ≤ 5.5V, VOUT = 1.2V/1.5V/1.8V/2.5V/3.3V @ 4A
DC1392A - Schematic

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