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Overview
Features and Benefits
- 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 x 16mm x 4.41mm LGA and16mm × 16mm × 5.01mm BGA Package
Product Details
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.
| VIN Range | VOUT Range | Compensation | DC VOUT Accuracy | |
| 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
- Telecom and Networking Equipment
- Storage and ATCA Cards
- Industrial Equipment
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation
Evaluation Kit Manuals (1)
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.
Models for the following parts are available in LTspice:
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.
Design tools for the following parts are available in LTpowerCAD:
Reference Materials
Informational (1)
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.
PCN-PDN Information
Sample & Buy
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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
