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- Application Notes
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- Purchase Demo Board
LTM4675 - Dual 9A or Single 18A μModule (Power Module) Regulator with Digital Power System Management
LTM4676 - Dual 13A or Single 26A μModule (Power Module) Regulator with Digital Power System Management
LTM4677 - Dual 18A or Single 36A μModule (Power Module) Regulator with Digital Power System Management
LTM4676A - Dual 13A or Single 26A μModule (Power Module) Regulator with Digital Power System Management
Features
- Order Custom Programmed Parts
- Dual, Fast, Analog Loops with Digital Interface for Control and Monitoring
- Wide Input Voltage Range: 4.5V to 17V
- Output Voltage Range: 0.5V to 5.5V
- ±0.5% Maximum DC Output Error Over Temperature
- ±2.5% Current Readback Accuracy at 10A Load
- 400kHz PMBus-Compliant I2C Serial Interface
- Integrated 16-Bit ΔΣ ADC
- Supports Telemetry Polling Rates Up to 125Hz
- Constant Frequency Current Mode Control
- Parallel and Current Share Multiple Modules
- All 7-Bit Slave Addresses Supported
- Rail and Global Addressing Supported
- 16mm × 16mm × 5.01mm BGA Package
- Download LTpowerPlay Software
Typical Application
Description
The LTM®4676A is a dual 13A or single 26A step-down μModule® (power module) DC/DC regulator with 70ms turn-on time. It features remote configurability and telemetry-monitoring of power management parameters over PMBus— an open standard I2C-based digital interface protocol . The LTM4676A is comprised of fast analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors and supporting components.
The LTM4676A’s 2-wire serial interface allows outputs to be margined, tuned and ramped up and down at programmable slew rates with sequencing delay times. Input and output currents and voltages, output power, temperatures, uptime and peak values are readable. At start-up, output voltages, switching frequency, and channel phase angle assignments can be set by pin-strapping resistors. The LTpowerPlay™ GUI and DC1613 USB-to-PMBus converter and demo kits are available.
| PART NUMBER |
TURN-ON START-UP TIME (MAX) (ms) |
VIN RANGE (V) |
VOUT RANGE (V) | PIN-COMPATIBLE |
| LTM4676 | 170 | 4.5 to 26.5 | 0.5V to 4 (CH0) 0.5 to 5.5 (Both CH) |
Yes |
| LTM4676A | 70 | 4.5 to 17 | 0.5 to 5.5 (Both CH) | |
| See Table 1 and page 22 for more on LTM4676A’s enhancements over LTM4676's feature set. | ||||
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 |
|---|---|---|---|---|---|
| LTM4676AEY#PBF | 16mm x 16mm x 5.01mm BGA | BGA | E | 05-08-1920 | Yes |
| LTM4676AEY#PBF-ES | 16mm x 16mm x 5.01mm BGA | BGA | E | 05-08-1920 | Yes |
| LTM4676AIY#PBF | 16mm x 16mm x 5.01mm BGA | BGA | I | 05-08-1920 | 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 | |
|---|---|---|---|---|---|---|
| LTM4676AEY#PBF | 16mm x 16mm x 5.01mm BGA | E | $48.50 | $33.95 | Yes | |
| LTM4676AEY#PBF-ES | 16mm x 16mm x 5.01mm BGA | E | $48.50 | $33.95 | Yes | |
| LTM4676AIY#PBF | 16mm x 16mm x 5.01mm BGA | I | $53.34 | $37.34 | 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 |
|---|---|---|---|
| DC1811B-B | LTM4676A Demo Board | Step-Down μModule Regulator with PMBus, 4.5V ≤ VIN ≤ 17V, Vout0 = 1V @ 13A, Vout1 = 1.8V @ 13A | $65.00 | |
| DC1989B-A | LTM4676A Demo Board | LTM4676A(x2) Current Shared, PMBus Buck uModule, 4.5V ≤ VIN ≤ 17V, Vout = 0.5V to 4V @ 50A | $105.00 | |
| DC1989B-B | LTM4676A Demo Board | LTM4676A(x3) Current Shared, PMBus Buck uModule, 4.5V ≤ VIN ≤ 17V, Vout = 0.5V to 4V @ 75A | $135.00 | |
| DC1989B-C | LTM4676A Demo Board | LTM4676A(x4) Current Shared, PMBus Buck uModule, 4.5V ≤ VIN ≤ 17V, Vout = 0.5V to 4V @ 100A | $165.00 | |
| DC2106B-B | LTM4676AEY/LTM4630EV Demo Board | PMBus Buck µModule (LTM4676A) + LTM4630 (x3), 4.5V ≤ VIN ≤ 16V, Vout = 0.5V to 1.8V @ 130A | $125.00 | |
| DC2204A | LTM4675 + LTM4676A + LTM4677 + LTM4620A Demo Board | PSM μModule Power Stick | $125.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1613A | USB-to-PMBus Controller for Use with LTpowerPlay | $50.00 | |
| DC2086A | Powered Programming Adapter for Digital Power System Management Products | $199.00 | |
| Buy Now | |||
Applications
- System Optimization, Characterization and Data Mining in Prototype, Production and Field Environments
People Who Viewed This Product Also Viewed
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Product Notifications
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Need help? Email mylinear@linear.com with questions and comments.
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
Models for the following parts are available in LTspice:
LTM4676
LTM4676A
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:
LTM4676
LTM4676 Parallel
LTM4676A
LTM4676A 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.
