LTM4650-1

Dual 25A or Single 50A µModule Regulator with 0.8% DC and 3% Transient Accuracy

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LTM4650

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

Overview

Features and Benefits
Product Details

Features and Benefits

±0.8% Maximum Total DC Output Error Over Line and Load (LTM4650-1A)
±3% Transient Output Error with Minimum Output Capacitance
Dual 25A or Single 50A Output
4.5V to 15V Input, 0.6V to 1.8V Output Voltage Range
Differential Remote Sense Amplifier
Current Mode Control/Fast Transient Response
Current Sharing Up to 300A
16mm × 16mm × 5.01mm BGA Package

Product Details

The LTM4650-1A/LTM4650-1B is dual 25A or single 50A output step-down µModule^® (power module) regulator with ±0.8% (LTM4650-1A) and ±1.5% (LTM4650-1B) total DC output error with ±3% transient output error. Included in the package are the switching controller, power FETs, inductors, and all supporting components. External compensation allows for fast transient response to minimize output capacitance when powering FPGAs, ASICs, and processors. With synchronized multiphase parallel current sharing, six LTM4650-1 devices can deliver up to 300A. The LTM4650-1 is offered in a 16mm × 16mm × 5.01 BGA package, with SnPb (BGA) or RoHS compliant terminal finish.


	V_IN Range	V_OUT Range	Comp	DC V_OUT 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%

Applications

FPGA, ASIC, μProcessor Core Voltage Regulation
Information, Communication Systems

Product Categories

Power Management
- µModule Buck Regulators
- Multiple Output Buck Regulators

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Product Lifecycle Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (6)

DC2479A-B

LTM4650EY-1 Demo Board | Dual Phase Buck μModule Regulator, 4.5V ≤ V_IN ≤ 15V, V_OUT = 0.6V to 1.8V @ 50A

DC2268A-H

LTM4650-1 Dual 25A or Single 50A µModule Regulator

DC2378A-B

LTM4650-1 Demo Board | Single 50A/Dual 25A Buck µModule Regulator, 4.5V ≤ V_IN ≤ 15V, V_OUT1/V_OUT2 = 0.9V/1.0V/1.2V/1.5V/1.8V @ 25A

DC2455A-C

LTM4650-1 Demo Board | LTM4650-1 (x4) Buck µModule Regulator, 4.5V ≤ V_IN ≤ 15V, V_OUT = 0.9V to 1.8V @ 200A

DC2455A-A

LTM4650-1 Demo Board | LTM4650-1 (x2) Buck µModule Regulator, 4.5V ≤ V_IN ≤ 15V, V_OUT = 0.9V to 1.8V @ 100A

DC2455A-B

LTM4650-1 Demo Board | LTM4650-1 (x3) Buck µModule Regulator, 4.5V ≤ V_IN ≤ 15V, V_OUT= 0.9V to 1.8V @ 150A

DC2479A-B

View Detailed Evaluation Kit Information

Demonstration circuit 2479A-B features the LTM4650EY-1, the high efficiency, high density, dual 25A, single 50A switch mode step-down power module regulator with external compensation. The input voltage is from 4.5V to 15V. The output voltage is programmable from 0.6V to 1.8V. DC2479A-B is configured as dual-phase, single-output, which can deliver up to 50A maximum. The board designs with minimum components to demonstrate this high efficiency, high density μModule. As explained in the data sheet, output current de-rating is necessary for certain V_IN, V_OUT, and thermal conditions. These features and the availability of the LTM4650EY-1 in a compact 16mm × 16mm × 5.01mm BGA package make it ideal for use in many high-density point-of-load applications. The LTM4650-1 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2479A-B.

Resources

DC2268A-H

View Detailed Evaluation Kit Information

Demonstration circuit 2268A-H is a high efficiency, high density, dual 25A, switch mode step-down power supply on a compact 1.5-inch × 1.2-inch PCB. It features the LTM4650-1 µModule^® regulator. The input voltage is from 4.5V to 15V. The output voltage is programmable from 0.6V to 1.8V. DC2268A-H can deliver up to 25A maximum in each channel. 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 resistor jumper (R1/R2) 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. Remote output voltage sensing is available for improved output voltage regulation at the load point. An optional input inductor L1 reduces the EMI noise for noise sensitive applications. DC2268A can be easily inserted to an edge connector for testing and debugging. These features and the availability of the LTM4650-1 in a compact 16mm × 16mm × 5.01mm BGA package make it ideal for use in many high density point-of-load regulation applications. The LTM4650-1 data sheet must be read in conjunction with this demo manual for working on or modifying the DC2268A-H.

Resources

DC2378A-B

View Detailed Evaluation Kit Information

Demonstration circuit DC2378A-B features the LTM4650EY-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 15V. The output voltage is programmable from 0.6V to 1.8V. DC2378A-B can deliver 25A maximum current from each channel. 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 LTM4650EY-1 in a compact 15mm × 15mm × 5.01mm BGA package make it ideal for use in many high density point-of-load regulation applications. The LTM4650-1 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2378A-B.

Resources

DC2455A-C

View Detailed Evaluation Kit Information

Demonstration Circuit 2455A-C features PolyPhase^® design using four LTM4650EY-1 (B-grade) high efficiency, high density, dual 25A, switch mode step-down power module regulators. The input voltage is from 4.5V to 15V. The output voltage is jumper selectable from 0.9V to 1.8V. DC2455A-C can deliver nominal 200A output current. As explained in the data sheet, output current de-rating is necessary for certain V_IN, V_OUT, and thermal conditions.

DC2455A-C always operates in continuous conduction mode. The switching frequency can be programmed through a resistor or can be synchronized to an external clock signal. The board allows the user to program how its output voltage ramps up and down through the TRACK pin. The output voltage is tightly regulated between test points “V_O+ ” and “V_O– ” through remote output voltage sensing, which improves output voltage regulation at heavy loads. These features and the availability of the LTM4650EY-1 in a compact 16mm × 16mm × 5.01mm BGA package make it ideal for use in many high-density point-of-load regulation applications. The LTM4650-1 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2455A-C.

Resources

DC2455A-A

View Detailed Evaluation Kit Information

Demonstration Circuit 2455A-A features PolyPhase^®operation using two LTM4650EY-1 (B-grade), high efficiency, high density, dual 25A/single 50A, switchmode step-down µModule regulators in parallel. The DC2455 input voltage is from 4.5V to 15V, and the output voltage is jumper-selectable from 0.9V to 1.8V. The output voltage is tightly regulated between pins “Vo+” and “Vo–” using remote output voltage sensing, which improves output voltage regulation at heavy loads. DC2455A-A delivers a nominal 100A output current.

As explained in the data sheet, output current derating is necessary for certain VIN, VOUT and thermal conditions. DC2455A-A is configured for continuous conduction mode. The nominal 1MHz switching frequency can be programmed through a resistor or can be synchronized to an external clock signal. The board allows the user to program output voltage ramp up and ramp down via the TRACK pin. These features and the availability of the LTM4650EY-1 in a compact 16mm × 16mm × 5.01mm BGA package make the LTM4650-1 ideal for use in many high-density point-of-load regulation applications. The LTM4650-1 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2455A-A.

Resources

DC2455A-B

View Detailed Evaluation Kit Information

Demonstration Circuit 2455A-B features PolyPhase^® design using three LTM4650EY-1 (B-grade high efficiency, high density, dual 25A, switch mode step-down power module regulators. The input voltage is from 4.5V to 15V. The output voltage is jumper selectable from 0.9V to 1.8V. DC2455A-B can deliver nominal 150A output current. As explained in the data sheet, output current de-rating is necessary for certain V_IN , V_OUT , and thermal conditions. DC2455A-B always operates in continuous conduction mode.

The switching frequency can be programmed through a resistor or can be synchronized to an external clock signal. The board allows the user to program how its output voltage ramps up and down through the TRACK pin. The output voltage is tightly regulated between test points “V_O+ ” and “V_O– ” through remote output voltage sensing, which improves output voltage regulation at heavy loads. These features and the availability of the LTM4650EY-1 in a compact 16mm × 16mm × 5.01mm BGA package make it ideal for use in many high-density point-of-load regulation applications. The LTM4650-1 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2455A-B.

Resources

Documentation & Resources

Data Sheets

LTM4650-1: Dual 25A or Single 50A µModule Regulator with 0.8% DC and 3% Transient Accuracy Data Sheet
12/8/2016
PDF

User Guides

Product Selector Card

μModule Power Products Simplify Power
4/11/2018
PDF

Informational

μModule Design and Manufacturing Resources
1/30/2018

Tools & Simulations

LTspice

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

LTspice downloads and documentation

LTspice Simulations

LTM4650-1 Demo Circuit - High Efficiency Single 50A Step-Down Regulator (4.5-15V to 1V @ 50A)

LTM4650-1 Demo Circuit - High Efficiency 8-Phase 200A Step-Down Regulator (4.5-15V to 1V @ 200A)

LTM4650-1 Demo Circuit - High Efficiency 6-Phase 150A Step-Down Regulator (4.5-15V to 1V @ 150A)

LTM4650-1 Demo Circuit - High Efficiency 4-Phase 100A Step-Down Regulator (4.5-15V to 1V @ 100A)

Models for the following parts are available in LTspice:

LTM4650

LTM4650-1

LTM4650A

LTM4650A-1

LTpowerCAD

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.

To open the project file for this circuit:

Step 1: Download and install LTpowerCAD on your computer.

Step 2: Click on the link(s) in the section below to download part-specific project files.

Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.

LTpowerCAD download and documentation

LTpowerCAD Project Files

LTM4650-1 Project - High Efficiency Single 50A Step-Down Regulator (4.5-15V to 1V @ 50A)

LTM4650-1 Project - High Efficiency 8-Phase 200A Step-Down Regulator (4.6-13.2V to 1V @ 200A)

LTM4650-1 Project - High Efficiency 6-Phase 150A Step-Down Regulator (4.6-13.2V to 1V @ 150A)

LTM4650-1 Project - High Efficiency 4-Phase 100A Step-Down Regulator (4.6-13.2V to 1V @ 100A)

LTM4650-1 Project - Dual 25A Buck uModule Regulator (4.5-14V to 1.5V @ 25A & 1V @ 25A)

Design tools for the following parts are available in LTpowerCAD:

LTM4650

LTM4650-1

LTM4650A

LTM4650A-1

Product Recommendations

LTM4650-1 Companion Parts

Recommended Related Parts

LTC2975.

Design Resources

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 Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
LTM4650EY-1A#PBF	Material Declaration	Reliability Data	144-Lead BGA (16mm x 16mm x 5.01mm)	Ultra Librarian SamacSys
LTM4650EY-1B#PBF	Material Declaration	Reliability Data	144-Lead BGA (16mm x 16mm x 5.01mm)	Ultra Librarian SamacSys
LTM4650IY-1A	Material Declaration	Reliability Data	144-Lead BGA (16mm x 16mm x 5.01mm)	Ultra Librarian SamacSys
LTM4650IY-1A#PBF	Material Declaration	Reliability Data	144-Lead BGA (16mm x 16mm x 5.01mm)	Ultra Librarian SamacSys
LTM4650IY-1B	Material Declaration	Reliability Data	144-Lead BGA (16mm x 16mm x 5.01mm)	Ultra Librarian SamacSys
LTM4650IY-1B#PBF	Material Declaration	Reliability Data	144-Lead BGA (16mm x 16mm x 5.01mm)	Ultra Librarian SamacSys
Wafer Fabrication Data

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