Features and Benefits
- Complete Boost Switch Mode Power Supply
- Wide Input Voltage Range: 4.5V to 28V
- Output Voltage Range: 6V to 36V
- 4A Continuous Output Current (12VIN, 24VOUT)
- ±2% Maximum Total Output Voltage Regulation Over Load, Line and Temperature
- Input Disconnect in Shutdown
- Inrush Current Limit
- External Frequency Synchronization
- Programmable Frequency (350kHz to 780kHz)
- Parallel Current Sharing
- Up to 98% Efficiency
- Selectable Burst Mode® Operation
- In-Line Overcurrent Protection
- Overtemperature Protection
- LTM4656-1 Adjustable Compensation Version
- 16mm × 16mm × 7.07mm BGA Package
The LTM4656 is a complete high efficiency boost μModule® (power module) regulator with the switching controller, power FETs, inductor, and all supporting components. Only a few input and output capacitors are needed. Operating over an input voltage range of 4.5V to 28V, the LTM4656 supports an output voltage range of 6V to 36V, set by a single external resistor. Its high efficiency design delivers up to 5A continuous output current. An in-line protection circuit sets the maximum input current, and will trip off the input power if exceeded and retry (see Typical Applications section on data sheet).
The high density boost design can convert up to 180W of output power.
Fault protection features include overtemperature protection, and overcurrent protection input referred with auto-retry. The μmodule is offered in a space saving and thermally enhanced 16mm × 16mm × 7.07mm BGA package. The LTM4656 is Pb-free and RoHS compliant.
- Telecom and Networking Equipment
- Electronic Test Equipment
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 (1)
Demonstration circuit 2634A is a boost µModule regulator featuring the LTM4656. The DC2634A operates from 6V to 36V input and generates 24V, 4A output from 12V input. When VIN ≥24V, VOUT follows VIN. Also, the LTM4656 has precision voltage reference, which can generate out-put voltage with 2% tolerance over the full operating conditions. The 400kHz switching frequency operation results in small and efficient circuit. The converter achieves over 95% efficiency with 4A load. The LTM4656 protects the load with the integrated soft-start and output short-circuit protection functions. The demonstration circuit can be easily modified to regulate different output voltages.
The DC2634A has small circuit footprint. It is a high performance and cost-effective solution for generating out-put voltages up to 36V from inputs as low as 5V.
Tools & Simulations
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® 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 Project Files
Design tools for the following parts are available in LTpowerCAD:
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.
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.
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.