LTM4601HV - 12A 28VIN DC/DC µModule (Power Module) Regulator with PLL, Output Tracking and Margining


  • Complete Switch Mode Power Supply
  • Wide Input Voltage Range: 4.5V to 28V
  • 12A DC Typical, 14A Peak Output Current
  • 0.6V to 5V Output Voltage
  • Output Voltage Tracking and Margining
  • Parallel Multiple µModule® Regulators for Current Sharing
  • Differential Remote Sensing for Precision Regulation
  • PLL Frequency Synchronization
  • ±1.5% Regulation
  • Current Foldback Protection (Disabled at Start-Up)
  • RoHS Compliant with Pb-Free Finish,
  • Gold Finish LGA (e4) or SAC 305 BGA (e1)
  • Ultrafast Transient Response
  • Current Mode Control
  • Up to 95% Efficiency at 5VIN, 3.3VOUT
  • Programmable Soft-Start
  • Output Overvoltage Protection
  • Small Footprint, Low Profile
    (15mm × 15mm × 2.82mm) Surface Mount LGA and
    (15mm × 15mm × 3.42mm) BGA Packages

Typical Application

LTM4601HV Typical Application
LTM4601HV Typical Application


The LTM4601HV 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 small surface mount 15mm × 15mm × 2.82mm LGA and 15mm × 15mm × 3.42mm BGA packages. Operating over an input voltage range of 4.5V to 28V, the LTM4601HV 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 in unused space on the back side of PC boards for high density point of load regulation. The µModule regulator can be synchronized with an external clock for reducing undesirable frequency harmonics and allows PolyPhase® operation for high load currents.

A high switching frequency and adaptive on-time current mode architecture deliver a very fast transient response to line and load changes without sacrificing stability. An onboard differential remote sense amplifier can be used to accurately regulate an output voltage independent of load current.

Vin Max 20V 20V 28V 28V
On Board Remote Sense

LTM4601 Yes

LTM4601-1 No

LTM4601A Yes

LTM4601A-1 No



Back Side Pads 118 135 (for stronger solder joint stability) 118 135 (for stronger solder joint stability)


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTM4601HVEV#PBF 15mm × 15mm x 2.82mm LGA LGA E 05-08-1801 Yes
LTM4601HVEY#PBF 15mm × 15mm × 3.42mm BGA BGA E 05-08-1903 Yes
LTM4601HVIV#PBF 15mm × 15mm x 2.82mm LGA LGA I 05-08-1801 Yes
LTM4601HVIY#PBF 15mm × 15mm × 3.42mm BGA BGA I 05-08-1903 Yes

LTM4601HV Package Drawing
LTM4601HV Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTM4601HVEV#PBF 15mm × 15mm x 2.82mm LGA E $30.56 $20.15 Yes
LTM4601HVEY#PBF 15mm × 15mm × 3.42mm BGA E $32.33 $21.32 Yes
LTM4601HVIV#PBF 15mm × 15mm x 2.82mm LGA I $33.65 $22.17 Yes
LTM4601HVIY#PBF 15mm × 15mm × 3.42mm BGA I $33.36 $23.36 Yes
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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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1041A-B LTM4601HV Demo Board | 28VIN, 12A Step-Down uModule Regulator $65.00
Buy Now
Click here to view our complete list of demo boards


  • Telecom and Networking Equipment
  • Servers
  • Industrial Equipment
  • Point of Load Regulation

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Design Tools


LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
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Models for the following parts are available in LTspice:


The LTpowerCAD design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:

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