LTM4644/LTM4644-1 - Quad DC/DC μModule (Power Module) Regulator with Configurable 4A Output Array
Features
- Quad Output Step-Down μModule® Regulator with 4A per Output
- Wide Input Voltage Range: 4V to 14V
- 2.375V to 14V with External Bias
- 0.6V to 5.5V Output Voltage
- 4A DC, 5A Peak Output Current Each Channel
- Up to 5.5W Power Dissipation (TA = 60°C, 200 LFM, No Heat Sink)
- ±1.5% Total Output Voltage Regulation
- Current Mode Control, Fast Transient Response
- Parallelable for Higher Output Current
- Output Voltage Tracking
- Internal Temperature Sensing Diode Output
- External Frequency Synchronization
- Overvoltage, Current and Temperature Protection
- 9mm × 15mm × 5.01mm BGA Package
Typical Application
Description
The LTM®4644/LTM4644-1 is a quad DC/DC step-down μModule (micromodule) regulator with 4A per output. Outputs can be paralleled in an array for up to 16A capability. Included in the package are the switching controllers, power FETs, inductors and support components. Operating over an input voltage range of 4V to 14V or 2.375V to 14V with an external bias supply, the LTM4644/LTM4644-1 supports an output voltage range of 0.6V to 5.5V. Its high efficiency design delivers 4A continuous (5A peak) output current per channel. Only bulk input and output capacitors are needed.
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 |
|---|---|---|---|---|---|
| LTM4644EY-1#PBF | 15mm × 9mm × 5.01mm BGA | BGA | E | 05-08-1900 | Yes |
| LTM4644EY#PBF | 15mm × 9mm × 5.01mm BGA | BGA | E | 05-08-1900 | Yes |
| LTM4644IY-1#PBF | 15mm × 9mm × 5.01mm BGA | BGA | I | 05-08-1900 | Yes |
| LTM4644IY#PBF | 15mm × 9mm × 5.01mm BGA | BGA | I | 05-08-1900 | Yes |
| LTM4644MPY | 15mm × 9mm × 5.01mm BGA | BGA | MP | 05-08-1900 | No |
| LTM4644MPY#PBF | 15mm × 9mm × 5.01mm BGA | BGA | MP | 05-08-1900 | 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 | |
|---|---|---|---|---|---|---|
| LTM4644EY-1#PBF | 15mm × 9mm × 5.01mm BGA | E | $32.64 | $22.85 | Yes | |
| LTM4644EY#PBF | 15mm × 9mm × 5.01mm BGA | E | $32.64 | $22.85 | Yes | |
| LTM4644IY-1#PBF | 15mm × 9mm × 5.01mm BGA | I | $35.91 | $25.14 | Yes | |
| LTM4644IY#PBF | 15mm × 9mm × 5.01mm BGA | I | $35.91 | $25.14 | Yes | |
| LTM4644MPY | 15mm × 9mm × 5.01mm BGA | MP | $73.44 | $51.41 | No | |
| LTM4644MPY#PBF | 15mm × 9mm × 5.01mm BGA | MP | $64.64 | $45.25 | 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 |
|---|---|---|---|
| DC1900A | LTM4644 Demo Board | Quad Buck µModule Regulator, 4V ≤ VIN ≤ 14V, Vout1 - Vout4 = 3.3V/2.5V/1.5V/1.2V @ 4A Each | $65.00 | |
| DC2428A | LTC2975 Demo Board Set | LTM4644 Quad 4A Power Supply Management (includes DC2382A + DC2363A) [requires DC1613] | $200.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1613A | USB-to-PMBus Controller for Use with LTpowerPlay | $50.00 | |
| DC2026C | Linduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform | $75.00 | |
| Buy Now | |||
Applications
- Multirail Point of Load Regulation
- FPGAs, DSPs and ASICs Applications
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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:
LTM4644
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:
LTM4644
LTM4644 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.
