Features and Benefits
- Complete Solution in <1cm2 (Single-Sided PCB) or 0.5cm2 (Dual-Sided PCB)
- 6.25mm × 6.25mm × 3.87mm BGA Package
- Wide Input Voltage Range: 3.1V to 20V
- 0.5V to 5.5V Output Voltage
- 8A DC Output Current
- ±1.5% Maximum Total DC Output Voltage Error Over Line, Load and Temperature
- Differential Remote Sensing Amp
- Current Mode Control, Fast Transient Response
- External Frequency Synchronization
- Multiphase Parallel Current Sharing with Multiple LTM4657s
- Output Voltage Tracking
- Selectable Discontinuous Mode
- Power Good Indicator
- Overvoltage, Overcurrent and Overtemperature Protection
- Pin Compatible with LTM4626(12A) and LTM4638(15A)
The LTM4657 is a complete 8A step-down switching mode µModule (micromodule) regulator in a tiny 6.25mm × 6.25mm × 3.87mm BGA package. Included in the package are the switching controller, power FETs, inductor and support components. Operating over an input voltage range of 3.1V to 20V, the LTM4657 supports an output voltage range of 0.5V to 5.5V, set by a single external resistor. Its high efficiency design delivers up to 8A continuous output current. Only bulk input and output capacitors are needed.
The LTM4657 supports selectable discontinuous mode operation and output voltage tracking for supply rail sequencing. Its high switching frequency and current mode control enable a very fast transient response to line and load changes without sacrificing stability.
Fault protection features include overvoltage, overcurrent and overtemperature protection.
The LTM4657 is available with SnPb or RoHS compliant terminal finish.
- Telecom, Datacom, Networking and Industrial Equipment
- Medical Diagnostic Equipment
- Data Storage Rack Units and Cards
- Test and Debug Systems
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 (2)
This evaluation board is obsolete and no longer recommended. The replacement board is the DC2665B-C.
Demonstration circuit 2989A features the LTM4657 µModule® regulator, a high performance, high efficiency step-down regulator. The LTM4657 is a complete DC/DC point-of-load regulator in a thermally enhanced 6.25mm x 6.25mm x 3.87mm BGA package. The LTM4657 has an operating input voltage range of 3.1V to 20V and provides an output current up to 8A. The output voltage is programmable from 0.6V to 5.5V and can be remotely sensed. The stacked inductor design improves thermal dissipation and significantly reduces the package area.
Output voltage tracking is available through the TRACK/SS pin for supply rail sequencing. External clock synchronization is available through the SYNC/MODE pin. For high efficiency at low load currents, select DCM mode operation using the MODE jumper (JP7) in less noise sensitive applications. The LTM4657 data sheet must be read in conjunction with this demo manual for working on or modifying DC2989A.
Demonstration circuit 2665B-C features the LTM4657 μModule® regulator, a high performance, high efficiency step-down regulator. The LTM4657 is a complete DC/DC point-of-load regulator in a thermally enhanced 6.25mm × 6.25mm × 3.87mm BGA package. The LTM4657 has an operating input voltage range of 3.1V to 20V and provides an output current up to 8A. The output voltage is programmable from 0.5V to 5.5V and can be remotely sensed. The stacked inductor design improves thermal dissipation and significantly reduces the package area. Output voltage tracking is available through the TRACK/ SS pin for supply rail sequencing. External clock synchronization is available through the SYNC/MODE pin. For high efficiency at low load currents, select discontinuous current mode (DCM) operation using the MODE jumper (JP7) in less noise sensitive applications. Refer to the LTM4657 data sheet in conjunction with the demo manual for working on or modifying DC2665B-C.
Documentation & Resources
R583 Reliability Data3/26/2018
DC2665B-C - Demo Manual (Rev. 0)3/28/2023
Simplify Power with µModule Regulators4/14/2020
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:
Reference Designs (1)
ZCU104Zynq UltraScale+ MPSoC ZCU104 Paper Reference Design
ZCU104Zynq UltraScale+ MPSoC ZCU104 Paper Reference Design
Features & Benefits
- The ZCU104 Evaluation Kit enables designers to jumpstart designs for embedded vision applications such as surveillance, Advanced Driver Assisted Systems (ADAS), machine vision, Augmented Reality (AR), drones and medical imaging.
- The ADI Power delivery solutions support multiple reference designs using DC/DC module and monolithic solutions. ADI offers several options for powering the Zu7 FPGA.
- Our module-based solutions combine a small footprint, while maximizing efficiency and tight regulation. Our monolithic based solutions support a lower cost optimized power delivery solution for mass production.
- ADI provides supporting documentation to enable you to validate the power solution for your application seamlessly.
- For a complete list power designs and use cases, please contact your local FAE.
- Please refer to the circuit descriptions below that best support your design.
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|
|LTM4657EY#PBF||Material Declaration||Reliability Data||49-Lead BGA (6.25mm × 6.25mm × 3.87mm)|
|LTM4657IY||Material Declaration||Reliability Data||49-Lead BGA (6.25mm × 6.25mm × 3.87mm)|
|LTM4657IY#PBF||Material Declaration||Reliability Data||49-Lead BGA (6.25mm × 6.25mm × 3.87mm)|
|Wafer Fabrication Data||R583 Reliability Data|
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