Features and Benefits
- Three Independent High Efficiency Regulator Channels
- IOUT1,2 = 5A, IOUT3 = 4A
- Input Voltage Range: 4.75V to 28V
- Independent VIN for Each Channel
- VOUT1,2 Voltage Range: 0.8V to 5.5V
- VOUT3 Voltage Range: 0.8V to 13.5V
- ±1.5% Maximum Total DC Output Error
- Current Mode Control/Fast Transient Response
- Frequency Synchronization
- Output Overvoltage and Overcurrent Protection
- PolyPhase® Operation with Current Sharing
- General Purpose Temperature Monitors
- Soft-Start/Voltage Tracking
- Power Good Monitors
- SnPb or RoHS Compliant Finish
- 15mm × 15mm × 5.01mm BGA Package
The LTM4634 integrates three complete 5A/5A/4A high efficiency switching mode DC/DC converters into one small package. Switching controllers, power FETs, inductors, and most support components are included. Operating over an input voltage range of 4.75V to 28V, the LTM4634 provides three independent output voltages. VOUT1 and VOUT2 are adjustable from 0.8V to 5.5V, while VOUT3 is adjustable from 0.8V to 13.5V. Each output voltage is set by a single external resistor.
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 parallel operation, soft-start and output voltage tracking for supply rail sequencing.
Fault protection features include overvoltage protection, overcurrent protection and temperature monitoring. The power module is offered in a space saving, thermally enhanced 15mm × 15mm × 5.01mm BGA package. The LTM4634 is available with SnPb (BGA) or RoHS compliant terminal finish.
- Telecom, Networking and Industrial Equipment
- High Density Point of Load Voltage Regulation
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 2121A features the LTM4634, a high efficiency, triple 5A/5A/4A step-down power μModule regulator. The input voltage range is from 4.75V to 28V. The output voltage range is 0.8V to 5.5V for Channel 1 and Channel 2, 0.8V to 13.5V for Channel 3. Derating is necessary for certain VIN, VOUT, frequency and thermal conditions. The DC2121A offers access to the TK/SS pins allowing the user to program output tracking or soft-start period. The board operates in continuous conduction mode in heavy load conditions.
Documentation & Resources
R504 Reliability Data3/26/2018
DC2121A - Demo Manual10/20/2014
SnPb (Tin-Lead) BGA Packages μModule Power Products7/13/2017
μModule Power Products4/4/2017
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.
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.
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:
LTM4634 Companion Parts
Recommended Related Parts
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|
|LTM4634EY#PBF||Material Declaration||Reliability Data||144-Lead BGA (15mm x 15mm x 5.01mm)|
|LTM4634IY||Material Declaration||Reliability Data||144-Lead BGA (15mm x 15mm x 5.01mm)|
|LTM4634IY#PBF||Material Declaration||Reliability Data||144-Lead BGA (15mm x 15mm x 5.01mm)|
|Wafer Fabrication Data||R504 Reliability Data|
Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.
Sample & Buy
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Please see the latest communication from our CCO regarding lead times.
A Sample link will be shown above, next to the part, only for parts that are included in our sample program. Selecting the Sample button 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.