LTM4601/LTM4601-1 - 12A µModule Regulator with PLL, Output Tracking and Margining


  • 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
  • Parallel Multiple μModule Regulators for Current Sharing
  • Differential Remote Sensing for Precision Regulation (LTM4601 Only)
  • PLL Frequency Synchronization
  • ±1.5% Regulation
  • 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
  • Small Footprint, Low Profile
    (15mm × 15mm × 2.82mm) Surface Mount LGA and
    (15mm × 15mm × 3.42mm) BGA Packages

Typical Application

LTM4601 Typical Application
LTM4601 Typical Application


The LTM®4601 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 20V, the LTM4601 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. The onboard remote sense amplifier is not available in the LTM4601-1.

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 footprint compatible with Mentor Graphics PADS® v9.5 or later, and Cadence ORCAD® v16.5 or later.

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

15mm x 15mm x 2.8mm LGA, 15mm x 15mm x 3.42mm BGA

LTM4601 Package Drawing
LTM4601 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTM4601AEV#PBF LGA 133 E $24.07 $16.85 View
LTM4601AEV-1#PBF LGA 133 E $23.43 $16.40 View
LTM4601AEY#PBF BGA 133 E $25.73 $18.01 View
LTM4601AHVEV#PBF LGA 133 E $29.14 $20.40 View
LTM4601AHVEY#PBF BGA 133 E $30.80 $21.56 View
LTM4601AHVIV#PBF LGA 133 I $32.06 $22.44 View
LTM4601AHVIY BGA 133 I $49.06 $34.35 View
LTM4601AHVIY#PBF BGA 133 I $33.87 $23.71 View
LTM4601AHVMPV#PBF LGA 133 MP $57.50 $40.25 View
LTM4601AHVMPY BGA 133 MP $74.34 $52.05 View
LTM4601AHVMPY#PBF BGA 133 MP $59.16 $41.41 View
LTM4601AIV#PBF LGA 133 I $26.49 $18.54 View
LTM4601AIV-1#PBF LGA 133 I $25.77 $18.04 View
LTM4601AIY BGA 133 I $43.50 $30.45 View
LTM4601AIY#PBF BGA 133 I $28.30 $19.81 View
LTM4601AIY-1#PBF BGA 133 I $27.43 $19.20 View
LTM4601EV#PBF LGA 118 E $25.05 $16.50 View
LTM4601EV-1#PBF LGA 118 E $24.21 $15.95 View
LTM4601EY#PBF BGA 118 E $26.87 $17.70 View
LTM4601EY-1#PBF BGA 118 E $24.45 $17.11 View
LTM4601HVEV#PBF LGA 118 E $30.56 $20.15 View
LTM4601HVIV#PBF LGA 118 I $33.65 $22.17 View
LTM4601HVIY#PBF BGA 118 I $33.36 $23.36 View
LTM4601IV#PBF LGA 118 I $27.55 $18.15 View
LTM4601IV-1#PBF LGA 118 I $26.64 $17.55 View
LTM4601IY BGA 118 I $41.03 $28.73 View
LTM4601IY#PBF BGA 118 I $29.28 $19.29 View
LTM4601IY-1#PBF BGA 118 I $26.74 $18.71 View
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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-A LTM4601 Demo Board | 4.5V ≤ VIN ≤ 20V, Vout = 0.6V to 5V @ 12A $65.00
DC1043A-A LTM4601 Demo Board | LTM4601(x2), 5V ≤ VIN ≤ 20V, Vout = 0.6V to 3.3V @ 20A $75.00
DC1043A-B LTM4601 Demo Board | LTM4601(x3), 5V ≤ VIN ≤ 20V, Vout = 0.6V to 3.3V @ 30A $85.00
DC1043A-C LTM4601 Demo Board | LTM4601(x4), 5V ≤ VIN ≤ 20V, Vout = 0.6V to 3.3V @ 40A $95.00
DC1118A-A LTM4601EV Demo Board | LTM4601(x2), 5V ≤ VIN ≤ 20V, Vout1 = 3.3V @ 10A, Vout2 = 2.5V @ 12A $75.00
DC1118A-B LTM4601EV Demo Board | LTM4601(x3), 5V ≤ VIN ≤ 20V, Vout1 = 3.3V @ 10A, Vout2 = 2.5V @ 12A, Vout3 = 1.8V @ 12A $85.00
DC1118A-C LTM4601EV Demo Board | LTM4601(x4), 5V ≤ VIN ≤ 20V, Vout1 = 3.3V @ 10A, Vout2 = 2.5V @ 12A, Vout3 = 1.8V @ 12A, Vout4 = 1.5V @ 12A $95.00
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  • Telecom and Networking Equipment
  • Servers
  • Industrial Equipment
  • Point of Load Regulation

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