LTM4650A - Dual 25A or Single 50A DC/DC μModule Regulator with 1% DC Accuracy

Features

  • Dual 25A or Single 50A Output
  • Input Voltage Range: 4.5V to 16V
  • Output Voltage Range: 0.6V to 5.5V
  • ±1% Maximum Total DC Output Error Over Line, Load and Temperature
  • Higher Light Load Efficiency and Wider VOUT Range Than LTM4650-1
  • Differential Remote Sense Amplifier
  • Current Mode Control/Fast Transient Response
  • Multiphase Parallel Current Sharing Up to 300A
  • Internal Temperature Monitor
  • Pin Compatible with the LTM4620A (Dual 13A, Single 26A) and LTM4630A (Dual 18A, Single 36A)
  • Adjustable Switching Frequency or Synchronization
  • Overcurrent Foldback Protection
  • Selectable Burst Mode® Operation, Pulse-Skipping Mode Operation
  • Soft-Start/Voltage Tracking
  • Output Overvoltage Protection
  • 16mm × 16mm × 5.01mm BGA Package

Typical Application

LTM4650A Typical Application
LTM4650A Typical Application

Description

The LTM®4650A is a dual 25A or single 50A output switching mode step-down DC/DC μModule® (micromodule) regulator with ±1% total DC output error. 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 16V, the LTM4650A supports two outputs with an output voltage range of 0.6V to 5.5V, 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. Fast internal control loop compensation allows for fast transient response to minimize output capacitance when powering FPGAs, ASICs, and processors.

Fault protection features include overvoltage and overcurrent protection. The LTM4650A is offered in 16mm × 16mm × 5.01mm BGA package.

LTM4650 Product Family Selection Table

  Vin Range Vout Range Comp DC Vout Accy
LTM4650 4.5V to 15V 0.6V to 1.8V Internal 1.5%
LTM4650-1B 4.5V to 15V 0.6V to 1.8V External 1.5%
LTM4650-1A 4.5V to 15V 0.6V to 1.8V External 0.8%
LTM4650A 4.5V to 16V 0.6V to 5.5V Internal 1%
LTM4650A-1 4.5V to 16V 0.6V to 5.5V External 1%

Packaging

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

Part Number Package Code Temp Package
Drawing
RoHS
LTM4650AEY#PBF 16mm × 16mm × 5.01mm BGA BGA E 05-08-1523 Yes
LTM4650AIY#PBF 16mm × 16mm × 5.01mm BGA BGA I 05-08-1523 Yes


LTM4650A 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
LTM4650AEY#PBF 16mm × 16mm × 5.01mm BGA E $68.57 $48.00 Yes
LTM4650AIY#PBF 16mm × 16mm × 5.01mm BGA I $75.43 $52.80 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
DC2603A-A LTM4650AEY Demo Board | Dual 25A or Single 50A DC/DC μModule Regulator $65.00
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Click here to view our complete list of demo boards

Applications

  • Telecom and Networking Equipment
  • Storage and ATCA Cards
  • Industrial Equipment

Product Notifications

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Design Tools

LTspice

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:
LTM4650
LTM4650-1
LTM4650A

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
LTM4650A-1
LTM4650A-1 Parallel

Technical Support