LTM4604A - Low Voltage, 4A DC/DC μModule (Power Module) Regulator with Tracking


  • Complete Standalone Power Supply
  • ±1.75% Max Total DC Output Error (–40°C to 125°C)
  • Wide Input Voltage Range: 2.375V to 5.5V
  • 4A DC, 5A Peak Output Current
  • 0.8V to 5V Output
  • Output Voltage Tracking
  • UltraFastTM Transient Response
  • Power Good Indicator
  • Current Mode Control
  • Current Foldback Protection, Parallel/Current Sharing
  • Up to 95% Efficiency
  • Programmable Soft-Start
  • Micropower Shutdown: IQ ≤ 7μA
  • Overtemperature Protection
  • 9mm × 15mm × 2.32mm LGA and 9mm × 15mm × 3.42mm BGA Packages

Typical Application

LTM4604A Typical Application
LTM4604A Typical Application


The LTM®4604A is a complete 4A switch mode step-down μModule® (power module) regulator with ±1.75% maximum total output voltage error. Included in the package are the switching controller, power FETs, inductor and all support components. Operating over an input voltage range of 2.375V to 5.5V, the LTM4604A supports an output voltage range of 0.8V to 5V, set by a single resistor. This high efficiency design delivers up to 4A continuous current (5A peak). Only input and output capacitors are needed to complete the design.

The 0.630mm LGA pads with 1.27mm pitch simplify PCB layout by providing standard trace routing and via placement. (The LTM4604A has smaller pads than the LTM4604). The low profile package enables utilization of unused space on the bottom of PC boards for high density point of load regulation. High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability.

Fault protection features include foldback current protection, thermal shutdown and a programmable soft-start function. The LTM4604A is offered with SnPb (BGA) or RoHS-compliant terminal finish.

LTM4604 -
LTM4604A Smaller pad sizes provide more distance between adjacent pads therefore there is less chance of solder paste or solder spreading outside the pad area


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
LTM4604AEV#PBF 15mm × 9mm × 2.32mm LGA LGA E 05-08-1820 Yes
LTM4604AEY#PBF 15mm x 9mm x 3.42mm BGA BGA E 05-08-1954 Yes
LTM4604AIV#PBF 15mm × 9mm × 2.32mm LGA LGA I 05-08-1820 Yes
LTM4604AIY 15mm x 9mm x 3.42mm BGA BGA I 05-08-1954 No
LTM4604AIY#PBF 15mm x 9mm x 3.42mm BGA BGA I 05-08-1954 Yes

LTM4604A Package Drawing
LTM4604A 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
LTM4604AEV#PBF 15mm × 9mm × 2.32mm LGA E $12.14 $8.50 Yes
LTM4604AEY#PBF 15mm x 9mm x 3.42mm BGA E $12.99 $9.10 Yes
LTM4604AIV#PBF 15mm × 9mm × 2.32mm LGA I $13.36 $9.35 Yes
LTM4604AIY 15mm x 9mm x 3.42mm BGA I $21.77 $15.23 No
LTM4604AIY#PBF 15mm x 9mm x 3.42mm BGA I $14.21 $9.95 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
DC1392A LTM4604AEV Demo Board | 2.375 ≤ VIN ≤ 5.5V, Vout = 1.2V/1.5V/1.8V/2.5V/3.3V @ 4A $65.00
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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:

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

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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