LTM4650 - Dual 25A or Single 50A DC/DC μModule Regulator

Features

  • Dual 25A or Single 50A Output
  • Input Voltage Range: 4.5V to 15V
  • Output Voltage Range: 0.6V to 1.8V
  • ±1.5% Maximum Total DC Output Error Over Line, Load and Temperature
  • Differential Remote Sense Amplifier
  • Current Mode Control/Fast Transient Response
  • Adjustable Switching Frequency
  • Frequency Synchronization
  • Overcurrent Foldback Protection
  • Multiphase Parallel Current Sharing with Multiple LTM4650s Up to 300A
  • Internal Temperature Monitor
  • Pin Compatible with the LTM4620 (Dual 13A, Single 26A) and LTM4630 (Dual 18A, Single 36A)
  • Selectable Burst Mode® Operation
  • Soft-Start/Voltage Tracking
  • Output Overvoltage Protection
  • 16mm × 16mm × 5.01mm BGA Package

Typical Application

LTM4650 Typical Application
LTM4650 Typical Application

Description

The LTM®4650 is a dual 25A or single 50A output switching mode step-down DC/DC μModule® (power module) regulator. Included in the package are the switching controllers, power FETs, inductors, and all supporting components. Operating from an input voltage range of 4.5V to 15V, the LTM4650 supports two outputs each with an output voltage range of 0.6V to 1.8V, each set by a single external resistor. Its high efficiency design delivers up to 25A continuous current for each output. Only a few input and output capacitors are needed. The LTM4650 is pin compatible with the LTM4620 (dual 13A, single 26A) and the LTM4630 (dual 18A, single 36A).

The device supports frequency synchronization, multiphase operation, Burst Mode operation and output voltage tracking for supply rail sequencing and has an onboard temperature diode 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 LTM4650 is offered in a 16mm × 16mm × 5.01mm BGA package.

  FEATURES
LTM4650 -
LTM4650-1 ±3% Transient Output Error with Minimum
Output Capacitance

Packaging

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

Part Number Package Code Temp Package
Drawing
RoHS
LTM4650EY#PBF 16mm x 16mm x 5.01mm BGA BGA E 05-08-1969 Yes
LTM4650IY#PBF 16mm x 16mm x 5.01mm BGA BGA I 05-08-1969 Yes


LTM4650 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
(1-99)
Price
(1k)*
RoHS
LTM4650EY#PBF 16mm x 16mm x 5.01mm BGA E $66.79 $46.75 Yes
LTM4650IY#PBF 16mm x 16mm x 5.01mm BGA I $73.46 $51.42 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
DC2378A-A LTM4650 Demo Board | Buck uModule Regulator, 4.5V ≤ VIN ≤ 15V, Vout = 0.6V to 1.8V @ 50A or Dual 25A $65.00
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Click here to view our complete list of demo boards

Applications

  • Processor, ASIC and FPGA Core Power
  • Telecom and Networking Equipment
  • Storage and ATCA Cards
  • Industrial Equipment

Product Notifications

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Design Tools

LTpowerCAD

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:
LTM4650
LTM4650 Parallel
LTM4650-1
LTM4650-1 Parallel

LTspiceIV

LTspice® IV 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 IV

Models for the following parts are available in LTspice IV:
LTM4650
LTM4650-1

Technical Support