LTM4619

RECOMMENDED FOR NEW DESIGNS

Dual, 26VIN, 4A DC/DC μModule (Power Module) Regulator

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Overview

  • Complete Standalone Power Supply
  • Wide Input Voltage Range: 4.5V to 26.5V (EXTVCC Available for VIN ≤ 5.5V)
  • Dual 180° Out-of-Phase Outputs with 4A DC Typical, 5A Peak Output Current for Each
  • Dual Outputs with 0.8V to 5V Range
  • Output Voltage Tracking
  • ±1.5% Maximum Total DC Output Error
  • Current Mode Control/Fast Transient Response
  • Power Good
  • Phase-Lockable Fixed Frequency 250kHz to 780kHz
  • On Board Frequency Synchronization
  • Parallel Current Sharing
  • Selectable Burst Mode® Operation
  • Output Overvoltage Protection
  • 15mm × 15mm × 2.82mm LGA Package

The LTM4619 is a complete dual 4A or single 8A stepdown DC/DC μModule® (power module) regulator. Included in the package are the switching controller, power FETs, inductor, and all support components. Operating over input voltage ranges of 4.5V to 26.5V, the LTM4619 supports two outputs with voltage ranges of 0.8V to 5V, each set by a single external resistor. Its high efficiency design delivers 4A continuous current (5A peak) for each output.

High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The two outputs are interleaved with 180° phase to minimize the ripple noise and reduce the I/O capacitors. The device supports frequency synchronization and output voltage tracking for supply rail sequencing. Burst Mode operation or pulseskipping mode can be selected for light load operations.

Fault protection features include overvoltage protection, overcurrent protection and foldback current limit for short-circuit protection.

The low profile package (2.82mm) enables utilization of unused space on the bottom of PC boards for high density point of load regulation. The power module is offered in a 15mm × 15mm × 2.82mm LGA package. The LTM4619 is RoHS compliant with Pb-free finish.

Applications

  • Telecom and Networking Equipment
  • Servers
  • Storage Cards
  • ATCA Cards
  • Industrial Equipment
  • Point of Load Regulation
LTM4619
Dual, 26VIN, 4A DC/DC μModule (Power Module) Regulator
Dual 4A 3.3V/2.5V DC/DC μModule Regulator Efficiency and Power Loss at 12V input Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 1

Data Sheet

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
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Oscillators 2
LTC6908
Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
LTC6902
PRODUCTION Multiphase Oscillator with Spread Spectrum Frequency Modulation
Power System Management (PSM) & Sequencers 1
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RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Protection Switches & Controllers 1
LTC4364
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTM4619
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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
schematic 4
schematic 5
DC1453A

LTM4619EV Demo Board | µModule Regulator with Tracking, 4.5V ≤ VIN ≤ 28V, VOUT1 = 3.3V @ 4A, VOUT2 = 1.8V @ 4A

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Product Details

Demonstration circuit 1453A features the LTM4619EV, a 4.5V to 28V input, high efficiency, high density, dual 4A step-down power module with 1.8V and 3.3V output voltages. Derating is necessary for certain VIN, VOUT, and thermal conditions. The two outputs are interleaved with 180° phase to minimize the input ripple and reduce the input capacitors. A minimum design only requires the bulk input and output capacitors and voltage setting resistors. The LTM4619EV features output voltage tracking, power good indicator, RUN pin control, clock synchronization and soft-start programming. Protection features include foldback current limiting and overvoltage protection. Burst Mode® operation or pulse skipping mode can be selected for better light load efficiency.
DC1453A
LTM4619EV Demo Board | µModule Regulator with Tracking, 4.5V ≤ VIN ≤ 28V, VOUT1 = 3.3V @ 4A, VOUT2 = 1.8V @ 4A
DC1453A Demo Board DC1453A Demo Board DC1453A Demo Board DC1453A Demo Board DC1453A - Schematic

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