LTM4646

RECOMMENDED FOR NEW DESIGNS

Dual 10A or Single 20A μModule Regulator

Data Sheet (Rev. A) Product Selection Table
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Overview

  • 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
LTM4646
Dual 10A or Single 20A μModule Regulator
Efficiency, 12V to 0.9V, 1.2V at 10A Each LTM4646 Package Image 1
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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
Hot Swap Controllers 1
LTC4234
RECOMMENDED FOR NEW DESIGNS 20A Guaranteed SOA Hot Swap Controller
Power System Management (PSM) & Sequencers 1
LTC2975
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTM4646

LTpowerCAD 1

Design tools for the following parts are available in LTpowerCAD:

  • LTM4646
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.

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.

Evaluation Kits

eval board
schematic 1
DC2527A-B

LTM4646 Demo Board | 4.5V ≤ VIN ≤ 20V, VOUT1 = 1.2V at 10A, VOUT2 = 1.5V at 10A

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Product Details

Demonstration circuit 2527A-B features the LTM4646EY, a dual 10A or single 20A high efficiency, switch mode step-down power μModule regulator. The input voltage range is from 4.5V to 20V. With CPWR bias, input voltage can be as low as 2.375V. The output voltage range is 0.6V to 5.5V. De-rating is necessary for certain VIN, VOUT, frequency and thermal conditions. The DC2527A-B offers the TRACK/SS pin allowing the user to program output tracking or soft-start period. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE_PLLIN jumper can select discontinuous conduction mode. The MODE_PLLIN pin also allows the LTM4646 to synchronize to an external clock signal (between 300kHz and 1.3MHz). DC2527A-B has the option of choosing both internal and external compensation circuit for LTM4646. Tying the PHASMD pin to different pins generates certain phases of CLKOUT and Channel2. The LTM4646 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC2527A-B.
DC2527A-B
LTM4646 Demo Board | 4.5V ≤ VIN ≤ 20V, VOUT1 = 1.2V at 10A, VOUT2 = 1.5V at 10A
DC2527A-B

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