LTM4650 - Dual 25A or Single 50A DC/DC μModule Regulator
Features
- Dual 25A or Single 50A Output
- Input Voltage Range: 4.5V to 15V
- Output Voltage Range: 0.6V to 1.8V
- ±1.5% Maximum Total DC Output Error Over Line, Load and Temperature
- Differential Remote Sense Amplifier
- Current Mode Control/Fast Transient Response
- Adjustable Switching Frequency
- Frequency Synchronization
- Overcurrent Foldback Protection
- Multiphase Parallel Current Sharing with Multiple LTM4650s Up to 300A
- Internal Temperature Monitor
- Pin Compatible with the LTM4620 (Dual 13A, Single 26A) and LTM4630 (Dual 18A, Single 36A)
- Selectable Burst Mode® Operation
- Soft-Start/Voltage Tracking
- Output Overvoltage Protection
- 16mm × 16mm × 5.01mm BGA Package
Typical Application
Description
The LTM®4650 is a dual 25A or single 50A output switching mode step-down DC/DC μModule® (power module) regulator. Included in the package are the switching controllers, power FETs, inductors, and all supporting components. Operating from an input voltage range of 4.5V to 15V, the LTM4650 supports two outputs each with an output voltage range of 0.6V to 1.8V, each set by a single external resistor. Its high efficiency design delivers up to 25A continuous current for each output. Only a few input and output capacitors are needed. The LTM4650 is pin compatible with the LTM4620 (dual 13A, single 26A) and the LTM4630 (dual 18A, single 36A).
The device supports frequency synchronization, multiphase operation, Burst Mode operation and output voltage tracking for supply rail sequencing and has an onboard temperature diode for device temperature monitoring. High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability.
Fault protection features include overvoltage and overcurrent protection. The LTM4650 is offered in a 16mm × 16mm × 5.01mm BGA package.
| FEATURES | |
| LTM4650 | - |
| LTM4650-1 | ±3% Transient Output Error with Minimum Output Capacitance |
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 |
|---|---|---|---|---|---|
| LTM4650EY#PBF | 16mm x 16mm x 5.01mm BGA | BGA | E | 05-08-1969 | Yes |
| LTM4650IY#PBF | 16mm x 16mm x 5.01mm BGA | BGA | I | 05-08-1969 | 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 | |
|---|---|---|---|---|---|---|
| LTM4650EY#PBF | 16mm x 16mm x 5.01mm BGA | E | $66.79 | $46.75 | Yes | |
| LTM4650IY#PBF | 16mm x 16mm x 5.01mm BGA | I | $73.46 | $51.42 | 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 |
|---|---|---|---|
| DC2378A-A | LTM4650 Demo Board | Dual Buck uModule Regulator, 4.5V ≤ VIN ≤ 15V, Vout1/Vout2 = 0.6V to 1.8V @ 25A | $65.00 | |
| DC2479A-A | LTM4650EY Demo Board | Dual Phase Buck μModule Regulator, 4.5V ≤ VIN ≤ 15V, Vout = 0.6V to 1.8V @ 50A | $65.00 | |
| DC2481A-A | LTM4677/LTM4650 Demo Board | Buck μModule Regulator with Digital PSM, LTM4677 + LTM4650, 4.5V ≤ VIN ≤ 16V, Vout = 0.5V to 1.8V @ 86A | $125.00 | |
| DC2481A-B | LTM4677/LTM4650 Demo Board | Buck μModule Regulator with Digital PSM, LTM4677 + LTM4650(x3), 4.5V ≤ VIN ≤ 16V, Vout = 0.5V to 1.8V @ 186A | $125.00 | |
| Buy Now | |||
Applications
- Processor, ASIC and FPGA Core Power
- Telecom and Networking Equipment
- Storage and ATCA Cards
- Industrial Equipment
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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
- LTM4650 Demo Circuit - High Efficiency Dual 25A Step-Down Regulator with Output Tracking (4.5-15V to 1.5 V @ 25A & 1V @ 25A)
- LTM4650 Demo Circuit - High Efficiency Dual 25A Step-Down Regulator with Output Tracking (4.5-15V to 1.5 V @ 25A & 1V @ 25A)
- LTM4650 Demo Circuit - High Efficiency Single 50A Step-Down Regulator (4.5-15V to 1V @ 50A)
- LTM4677 & LTM4650 Demo Circuit - High Current, Parallel µModule Buck Regulators with Power System Management (4.5-16V to 1V @ 86A)
- LTM4677 & LTM4650 Demo Circuit - High Current, Parallel µModule Buck Regulators with Power System Management (4.5-16V to 1V @186A)
- 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:
LTM4650
LTM4650-1
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:
LTM4650
LTM4650 Parallel
LTM4650-1
LTM4650-1 Parallel
LTM4650A-1
LTM4650A-1 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.
