LTM4646 - Dual 10A or Single 20A μModule Regulator


  • Dual 10A or Single 20A Output
  • Wide Input Voltage Range: 4.5V to 20V
    • 2.375VMIN with CPWR Bias
  • Output Voltage Range: 0.6V to 5.5V
  • ±1.5% Maximum Total DC Output Error
  • Multiphase Current Sharing
  • Differential Remote Sense Amplifier, Each Channel
  • Current Mode Control/Fast Transient Response
  • Up to 96% Efficiency
  • Adjustable Switching Frequency (250kHz to 1.3MHz)
  • Frequency Synchronization
  • Overcurrent Foldback Protection
  • Output Overvoltage Protection
  • Internal or External Compensation
  • Built-In Temperature Monitoring Diode
  • SnPb or RoHS Compliant Finish
  • 11.25mm × 15mm × 5.01mm BGA Package

Typical Application

LTM4646 Typical Application
LTM4646 Typical Application


The LTM®4646 is a complete dual 10A output switching mode DC/DC power supply. Included in the package are the switching controller, power FETs, inductors, and all supporting components. Operating from an input voltage range of 4.5V to 20V, the LTM4646 supports two outputs each with an output voltage range of 0.6V to 5.5V, set by external resistors. Its high efficiency design delivers up to 10A continuous current for each output. Only a few input and output capacitors are needed.

The device supports frequency synchronization, multiphase operation, high efficiency light load operation and output voltage tracking for supply rail sequencing and has an onboard temperature diode per channel for device temperature monitoring. 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 overvoltage and overcurrent protection. The power module is offered in a small footprint 11.25mm × 15mm × 5.01mm BGA package. The LTM4646 is available with SnPb or RoHS compliant terminal finish.


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
LTM4646EY#PBF 15mm × 11.25mm × 5.01mm BGA BGA E 05-08-1541 Yes
LTM4646IY 15mm × 11.25mm × 5.01mm BGA BGA I 05-08-1541 No
LTM4646IY#PBF 15mm × 11.25mm × 5.01mm BGA BGA I 05-08-1541 Yes

LTM4646 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
LTM4646EY#PBF 15mm × 11.25mm × 5.01mm BGA E $26.93 $18.85 Yes
LTM4646IY 15mm × 11.25mm × 5.01mm BGA I $39.69 $27.78 No
LTM4646IY#PBF 15mm × 11.25mm × 5.01mm BGA I $29.63 $20.74 Yes
Buy NowRequest Samples
* 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
DC2527A LTM4646 Demo Board | 4.5V ≤ Vin ≤ 20V, Vout1=1.2V@10A, Vout2=1.5V@10A Contact Factory
Buy Now
Click here to view our complete list of demo boards


  • Point-of-Load Power Supplies
  • Telecom and Networking Equipment
  • Industrial Equipment
  • Medical Equipment

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email with questions and comments.

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

Models for the following parts are available in LTspice:

Technical Support