LTM4637: 20A DC/DC μModule (Power Module) Step-Down Regulator Data Sheet2/26/2014609K
Features and Benefits
- Complete 20A Switch Mode Power Supply
- 4.5V to 20V Input Voltage Range
- 0.6V to 5.5V Output Voltage Range
- ±1.5% Total DC Output Voltage Error (–40°C to 125°C)
- Differential Remote Sense Amplifier for Precision Regulation for (VOUT ≤ 3.3V)
- Current Mode Control/Fast Transient Response
- Parallel Current Sharing (Up to 80A)
- Frequency Synchronization
- Selectable Pulse-Skipping or Burst Mode® Operation
- Soft-Start/Voltage Tracking
- Up to 88% Efficiency (12VIN, 1.8VOUT)
- Overcurrent Foldback Protection
- Output Overvoltage Protection
- Internal Temperature Monitor
- Overtemperature Protection
- 15mm × 15mm × 4.32mm LGA and 15mm × 15mm × 4.92mm BGA Packages
- SnPb (BGA) or RoHS Compliant (LGA and BGA) Finish
The LTM4637 is a complete 20A output high efficiency switch mode step-down DC/DC μModule (power module) regulator. Included in the package are the switching controller, power FETs, inductor and compensation components. Operating over an input voltage range from 4.5V to 20V, the LTM4637 supports an output voltage range of 0.6V to 5.5V, set by a single external resistor. Only a few input and output capacitors are needed.
Current mode operation allows precision current sharing of up to four LTM4637 regulators to obtain up to 80A output. High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The device supports frequency synchronization, multiphase/current sharing, Burst Mode operation and output voltage tracking for supply rail sequencing. A diode-connected PNP transistor is available for use as an internal temperature monitor.
The LTM4637 is offered in 15mm × 15mm × 4.32mm LGA and 15mm × 15mm × 4.92mm packages. The LTM4637 is available with SnPb (BGA) or RoHS compliant terminal finish. The LTM4637 is pin compatible with the LTM4627, a 15A DC/DC μModule regulator.
- Telecom Servers and Networking Equipment
- Industrial Equipment
- Medical Systems
- High Ambient Temperature 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 (1)
Demonstration circuit DC1872A features the LTM4637EV, a high efficiency, high density switch mode step-down power μModule® regulator. The input voltage range is from 4.5V to 20V. The output voltage is jumper programmable from 1.0V to 1.8V with a rated load current of 20A. Derating is necessary for certain VIN, VOUT, frequency and thermal conditions.
Documentation & Resources
R504 Reliability Data3/26/2018347 K
DC1872A - Demo Manual3/13/20132M
μModule Power Products Simplify Power4/11/20189 M
SnPb (Tin-Lead) BGA Packages μModule Power Products7/13/20171M
μModule Power Products4/4/201710M
Avoid Debugging Cycles in Power Management for FPGA, GPU and ASIC Systems8/1/2016 LT Journal
Complete 20V, 20A High Performance µModule DC/DC Regulator in 15mm × 15mm × 4.32mm Package1/1/2014 LT Journal
Tools & Simulations
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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:
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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)
Altera Arria 10 FPGA Development Kit
Altera Arria 10 FPGA Development Kit
Features & Benefits
- Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
- Our reference designs are supported by an intuitive design tool set and IP
- Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
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|
|LTM4637EV#PBF||Material Declaration||Reliability Data||133-Lead LGA (15mm x 15mm x 4.32mm)|
|LTM4637EY#PBF||Material Declaration||Reliability Data||133-Lead BGA (15mm x 15mm x 4.92mm)|
|LTM4637IV#PBF||Material Declaration||Reliability Data||133-Lead LGA (15mm x 15mm x 4.32mm)|
|LTM4637IY||Material Declaration||Reliability Data||133-Lead BGA (15mm x 15mm x 4.92mm)|
|LTM4637IY#PBF||Material Declaration||Reliability Data||133-Lead BGA (15mm x 15mm x 4.92mm)|
|Wafer Fabrication Data||R504 Reliability Data|
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