LTM4633 - Triple 10A Step-Down DC/DC μModule Regulator


  • Three Independent 10A DC Output Current Regulator Channels
  • Input Voltage Range: 4.7V to 16V
  • 2.375V to 16V with External 5V Bias
  • VOUT1,2 Voltage Range: 0.8V to 1.8V
  • VOUT3 Voltage Range: 0.8V to 5.5V
  • ±1.5% Maximum Total DC Output Error
  • Current Mode Control/Fast Transient Response
  • Frequency Synchronization
  • Output Overvoltage and Overcurrent Protection
  • Multiphase Operation with Current Sharing on VOUT1 and VOUT2
  • General Purpose Temperature Monitors
  • Soft-Start/Voltage Tracking
  • Power Good Monitors
  • 15mm × 15mm × 5.01mm BGA Package

Typical Application

LTM4633 Typical Application
LTM4633 Typical Application


The LTM®4633 μModule® (micromodule) regulator combines three complete 10A switching mode DC/DC converters into one small package. Included in the package are the switching controllers, power FETs, inductors, and most support components. The LTM4633’s three regulators operate from 4.7V to 16V input rail(s) or 2.375V to 16V with an external 5V bias. The VOUT1 and VOUT2 output range is 0.8V to 1.8V, while the VOUT3 output range is 0.8V to 5.5V. Each output is set by one external resistor.

High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The device supports frequency synchronization, multiphase parallel operation of VOUT1 and VOUT2, soft-start and output voltage tracking for supply rail sequencing.

Fault protection features include overvoltage protection, overcurrent protection and temperature monitoring. The power module is offered in a space saving, thermally enhanced 15mm × 15mm × 5.01mm BGA package. The LTM4633 is RoHS compliant with Pb-free finish.


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 5.01mm BGA

LTM4633 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTM4633EY#PBF BGA 144 E $51.35 $35.95 View
LTM4633IY BGA 144 I $72.96 $51.07 View
LTM4633IY#PBF BGA 144 I $56.50 $39.55 View
LTM4633MPY BGA 144 MP $116.61 $81.62 View
LTM4633MPY#PBF BGA 144 MP $100.14 $70.10 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
DC1905A LTM4633 Demo Board | Triple Buck µModule Regulator, 4.7V ≤ VIN ≤ 16V, Vout1 & Vout2 = 0.8V to 1.8V @ 10A, Vout3 = 0.8V to 5.5V @ 10A $65.00
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  • Telecom, Networking and Industrial Equipment
  • High Density Point of Load Regulation

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