LTM4634 - Triple Output 5A/5A/4A Step-Down DC/DC μModule (Power Module) Regulator
Features
- 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
Typical Application
Description
The LTM®4634 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.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTM4634EY#PBF | 15mm x 15mm x 5.01mm BGA | BGA | E | 05-08-1908 | Yes |
| LTM4634IY#PBF | 15mm x 15mm x 5.01mm BGA | BGA | I | 05-08-1908 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTM4634EY#PBF | 15mm x 15mm x 5.01mm BGA | E | $51.35 | $35.95 | Yes | |
| LTM4634IY#PBF | 15mm x 15mm x 5.01mm BGA | I | $56.50 | $39.55 | Yes | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC2121A | LTM4634 Demo Board | Triple, 4.75V ≤ VIN ≤ 28V, Vout1/Vout2 = 0.8V to 5.5V @ 5A, Vout3 = Up to 13.5V @ 4A | $65.00 | |
| Buy Now | |||
Applications
- Telecom, Networking and Industrial Equipment
- High Density Point of Load Voltage Regulation
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Product Notifications
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
To launch a ready to run LTspice demonstration circuit for this part:
- Step 1: If you have not installed LTspice on this computer, download and install LTspice
- Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
- Step 3: If LTspice does not automatically open after clicking the link above, 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
To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.
Models for the following parts are available in LTspice:
LTM4634
LTpowerCAD
The LTpowerCAD design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD
To open the project file for this circuit:
- Step 1: If you have not installed LTpowerCAD on this computer, download and install LTpowerCAD
- Step 2: Once LTpowerCAD is installed, click on the link(s) below to open the project file
- Step 3: If LTpowerCAD does not automatically open after clicking the link above, you can open the project file by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTpowerCAD and open the project file by selecting 'Open Project' from the 'File' menu
Design tools for the following parts are available in LTpowerCAD:
LTM4634
LTM4634 Parallel
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
