LTM4650A

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. D) Product Selection Table

Part Models: 5
1ku List Price: Starting From $55.32

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Part Details

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 V_OUT 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 x 16mm x 4.41mm LGA and16mm × 16mm × 5.01mm BGA Package

The LTM4650A 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
	V_IN Range	V_OUT Range	I_OUT	Compensation	DC V_OUT Accuracy
LTM4650	4.5V to 15V	0.6V to 1.8V	25A × 2	Internal	1.5%
LTM4650-1B	4.5V to 15V	0.6V to 1.8V	25A × 2	External	1.5%
LTM4650-1A	4.5V to 15V	0.6V to 1.8V	25A × 2	External	0.8%
LTM4650A	4.5V to 16V	0.6V to 5.5V	25A × 2	Internal	1%
LTM4650A-1	4.5V to 16V	0.6V to 5.5V	25A × 2	External	1%

Applications

Telecom and Networking Equipment
Storage and ATCA Cards
Industrial Equipment

Part Models: 5
1ku List Price: Starting From $55.32

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTM4650AEV#PBF	144-Lead LGA (16mm x 16mm x 4.41mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTM4650AEY#PBF	144-Lead BGA (16mm x 16mm x 5.01mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTM4650AIV#PBF	144-Lead LGA (16mm x 16mm x 4.41mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTM4650AIY	144-Lead BGA (16mm x 16mm x 5.01mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTM4650AIY#PBF	144-Lead BGA (16mm x 16mm x 5.01mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 22, 2022 - 22_0169 Notification of additional Assembly Location, ASE Korea for LTM4650 and LTM4650A
		PCN22_0169_Form Material_Report Qualification Results Summary
LTM4650AEV#PBF	PRODUCTION
LTM4650AEY#PBF	PRODUCTION
LTM4650AIV#PBF	PRODUCTION
LTM4650AIY	PRODUCTION
LTM4650AIY#PBF	PRODUCTION
Nov 8, 2021 - 20_0245 Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)
		PCN20_0245_Form Material_Report Delta Qualification Matrix Other Qualification Results Summary
LTM4650AEV#PBF	PRODUCTION
LTM4650AEY#PBF	PRODUCTION
LTM4650AIV#PBF	PRODUCTION
LTM4650AIY	PRODUCTION
LTM4650AIY#PBF	PRODUCTION
Jul 21, 2021 - 21_0159 Ink Mark to Laser Mark Conversion for µModule
		PCN21_0159_Form Material_Report Delta Qualification Matrix
LTM4650AEV#PBF	PRODUCTION
LTM4650AEY#PBF	PRODUCTION
LTM4650AIV#PBF	PRODUCTION
LTM4650AIY	PRODUCTION
LTM4650AIY#PBF	PRODUCTION
Feb 28, 2020 - 20_0123 Micro-Module, Test Site Transfer from Analog Devices Singapore to Analog Devices Penang, Malaysia
		PCN20_0123_Form Material_Report Test Correlation Report Other Qualification Results Summary
LTM4650AEV#PBF	PRODUCTION
LTM4650AEY#PBF	PRODUCTION
LTM4650AIV#PBF	PRODUCTION
LTM4650AIY	PRODUCTION
LTM4650AIY#PBF	PRODUCTION
Feb 5, 2020 - 20_0127 Supplier Material Change for µModule
		PCN20_0127_Form Material_Report Qualification Results Summary
LTM4650AEV#PBF	PRODUCTION
LTM4650AEY#PBF	PRODUCTION
LTM4650AIV#PBF	PRODUCTION
LTM4650AIY	PRODUCTION
LTM4650AIY#PBF	PRODUCTION
Jul 25, 2019 - 19_0168 Notification of qualification of a new mold compound for the LTM4650, LTM4650A, LTM4650A-1 µModule Regulator
		PCN19_0168_Form Material_Report Qualification Results Summary
LTM4650AEV#PBF	PRODUCTION
LTM4650AEY#PBF	PRODUCTION
LTM4650AIV#PBF	PRODUCTION
LTM4650AIY	PRODUCTION
LTM4650AIY#PBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Digital Power System Managers 1
LTC2975	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement
Low Voltage Hot Swap Controllers 1
LTC4219	RECOMMENDED FOR NEW DESIGNS	5A Integrated Hot Swap Controller

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTM4650
LTM4650-1
LTM4650-2
LTM4650A
LTM4650A-1

LTpowerCAD 2

Design tools for the following parts are available in LTpowerCAD:

LTM4650
LTM4650-1
LTM4650-2
LTM4650A
LTM4650A-1
LTM4650A-1(INVERTING)

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

LTM4650AEY Demo Board | Dual 25A or Single 50A DC/DC μModule Regulator

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Product Details

Demonstration circuit 2603A-A features the LTM4650AEY-1, the high efficiency, high density, dual 25A, single 50A switch mode step-down power module regulator. The input voltage is from 4.5V to 16V. The output voltage is programmable from 0.6V to 5.5V. DC2603A-A can deliver 25A maximum current from each channel. The board designs with minimum components to demonstrate this high efficiency, high density μModule^®. As explained in the data sheet, output current derating is necessary for certain V_IN, V_OUT, and thermal conditions. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE jumper (JP1) selects pulse-skipping mode for noise sensitive applications or Burst Mode^® operation in less noise sensitive applications. Two outputs can be connected in parallel for a single 50A output solution with optional jumper resistors. The board allows the user to program how its output ramps up and down through the TRACK/SS pin. The output can be set up to either coincidentally or ratiometrically track with another supply’s output. Remote output voltage sensing is available for improved output voltage regulation at the load point. These features and the availability of the LTM4650AEY in a compact 16mm × 16mm × 5.01mm BGA package make it ideal for use in many high-density point-of-load applications. The LTM4650A data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2603A-A.