LTM4601A
LTM4601A-1

PRODUCTION

12A μModule (Power Module) Regulators with PLL, Output Tracking and Margining

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Overview

  • Complete Switch Mode Power Supply
  • Wide Input Voltage Range: 4.5V to 20V
  • 12A DC Typical, 14A Peak Output Current
  • 0.6V to 5V Output Voltage
  • Output Voltage Tracking and Margining
  • Redundant Mounting Pads for Enhanced Solder-Joint Strength
  • Parallel Multiple μModules for Current Sharing
  • Differential Remote Sensing for Precision Regulation (LTM4601A Only)
  • PLL Frequency Synchronization
  • ±1.5% Total DC Error
  • Current Foldback Protection (Disabled at Start-Up)
  • SnPb or RoHS Compliant Finish
  • UltraFast™ Transient Response
  • Current Mode Control
  • Up to 95% Efficiency at 5VIN, 3.3VOUT
  • Programmable Soft-Start
  • Output Overvoltage Protection
  • Enhanced (15mm × 15mm × 2.82mm) Surface Mount LGA and (15mm × 15mm × 3.42mm) BGA Packages

The LTM4601A is a complete 12A step-down switch mode DC/DC power supply with onboard switching controller, MOSFETs, inductor and all support components. The μModule® regulator is housed in a small surface mount 15mm × 15mm × 2.82mm LGA or 15mm × 15mm × 3.42mm BGA package. The LTM4601A LGA and BGA packages are designed with redundant mounting pads to enhance solder-joint strength for extended temperature cycling endurance. Operating over an input voltage range of 4.5V to 20V, the LTM4601A supports an output voltage range of 0.6V to 5V as well as output voltage tracking and margining. The high efficiency design delivers 12A continuous current (14A peak). Only bulk input and output capacitors are needed to complete the design.

The low profile and light weight package easily mounts on the back side of PC boards. The μModule regulator can be synchronized with an external clock for reducing undesirable frequency harmonics and allows PolyPhase® operation for high load currents.

An onboard differential remote sense amplifier can be used to accurately regulate an output voltage independent of load current. The onboard remote sense amplifier is not available in the LTM4601A-1.

  LTM4601 LTM4601A LTM4601HV LTM4601AHV
Vin Max 20V 20V 28V 28V
On Board Remote Sense LTM4601 Yes LTM4601A Yes Yes Yes
On Board Remote Sense LTM4601-1 No LTM4601A-1 No Yes Yes
Back Side Pads 118 135 (for stronger solder joint stability) 118 135 (for stronger solder joint stability)

Applications

  • Telecom and Networking Equipment
  • Servers
LTM4601A
LTM4601A-1
12A μModule (Power Module) Regulators with PLL, Output Tracking and Margining
1.5V/12A Power Supply with 4.5V to 20V Input Efficiency and Power Loss vs Load Current Product Package 1 Product Package 2
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Documentation

Data Sheet 1

User Guide 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Circuit Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Oscillators 1
LTC6908
Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
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
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
Switching Regulators & Controllers 1
LTM4620A
PRODUCTION Dual 13A or Single 26A DC/DC μModule (Power Module) Regulator
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTM4601
  • LTM4601-1
  • LTM4601A
  • LTM4601A-1
  • LTM4601AHV
  • LTM4601HV
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
DC1414B-A

LTM4601A Demo Board | 5VIN to 28VIN, 12A Step-Down µModule Regulator

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Product Details

Demonstration circuit 1414B-A features the LTM4601A, the high efficiency, high density switch mode step-down power module. The input voltage range is 5V to 20V with a jumper selectable output voltage from 0.6V to 5V. The rated load current is 12A, although derating is necessary for certain VIN, VOUT and thermal conditions. The PLLIN pin supports synchronizing the µModule® regulator to an external clock. The TRACK/SS pin allows the user to program output ramp-up and ramp-down rates which may coincidentally or ratiometrically track with another voltage rail. Output voltage margining of ±5% from the nominal value is available via the margin control pins MARG0 and MARG1. The LTM4601A data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC1414B-A.

eval board
schematic 2
DC1414A

LTM4601AEV Demo Board | µModule Regulator, 5V ≤ VIN ≤ 20V, VOUT = 0.6V to 5V @ up to 20A

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Product Details

Demonstration circuit 1414 features the LTM4601AEV, a high efficiency, high density switch mode step-down power module. The DC1414A accepts an input voltage from 5V to 20V to deliver a jumper selectable output voltage from 0.6V to 5V at up to 12A. Derating is necessary for certain VIN, VOUT, and thermal conditions.


The LTM4601A allows the user to program output ramp-up and ramp-down through the TRACK/SS pin. The output can be set to coincidentally or ratiometrically track with another voltage rail. This board also supports demonstration of the output voltage margining function.
DC1414B-A
LTM4601A Demo Board | 5VIN to 28VIN, 12A Step-Down µModule Regulator
DC1414B-A Evaluation Board
DC1414A
LTM4601AEV Demo Board | µModule Regulator, 5V ≤ VIN ≤ 20V, VOUT = 0.6V to 5V @ up to 20A
DC1414A - Schematic

Latest Discussions

2 Years Ago
How to connect LTM4601A-1 NC pins
3 Years Ago
What is the difference between LTM4601A and LTM4601?
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