LTM4661 - 15V, 4A Step-Up μModule Regulator


  • Complete Solution in <1cm2 (Single-Sided PCB) or 0.5cm2 (Dual-Sided PCB)
  • Input Voltage Range: 1.8V to 5.5V, Down to 0.7V After Start-Up
  • Output Voltage Range: 2.5V to 15V
  • 4A Switch Current
  • Dual Phase Operation
  • ±3% Maximum Total DC Output Voltage Regulation Over Load, Line and Temperature
  • Output Disconnect in Shut Down
  • Inrush Current Limit
  • External Frequency Synchronization
  • Selectable Burst Mode® Operation
  • Output Overvoltage and Overtemperature Protection
  • 6.25mm × 6.25mm × 2.42mm BGA package

Typical Application

LTM4661 Typical Application
LTM4661 Typical Application


The LTM®4661 is a synchronous step-up switching mode μModule® (power module) regulator in a 6.25mm × 6.25mm × 2.42mm BGA package. Included in the package are the switching controller, power FETs, inductor and all support components. Operating over an input voltage of 1.8V to 5.5V, down to 0.7V after start-up, the LTM4661 regulates an output voltage of 2.5V to 15V set by an external resistor. It provides up to 4A switch current. Only bulk input and output capacitors are needed.

The LTM4661 1MHz switching frequency and dual phase single output architecture enable fast transient response to line and load changes and a significant reduction of output ripple voltage. It supports frequency synchronization, PolyPhase® operation and selectable Burst Mode operation. The LTM4661 features a true output disconnect during shutdown and inrush current limit at start-up. It also has short-circuit, overvoltage and overtemperature protection.

The LTM4661 is Pb-free and RoHS compliant.



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

Part Number Package Code Temp Package
LTM4661EY#PBF 6.25mm x 6.25mm x 2.42mm BGA BGA E 05-08-1502 Yes
LTM4661IY 6.25mm x 6.25mm x 2.42mm BGA BGA I 05-08-1502 No
LTM4661IY#PBF 6.25mm x 6.25mm x 2.42mm BGA BGA I 05-08-1502 Yes

LTM4661 Package Drawing
LTM4661 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
LTM4661EY#PBF 6.25mm x 6.25mm x 2.42mm BGA E $9.97 $6.98 Yes
LTM4661IY 6.25mm x 6.25mm x 2.42mm BGA I $13.83 $9.68 No
LTM4661IY#PBF 6.25mm x 6.25mm x 2.42mm BGA I $10.97 $7.68 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
DC2569A LTM4661EY Demo Board | 1.8V-5.5V Input, Synchronous Step-Up μModule Regulator $65.00
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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
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