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Application Note
Design Note
Reliability Data
Product Selector Card
- Digital Power System Management
- SnPb (Tin-Lead) BGA Packages μModule Power Products
- μModule Power Products Catalog
LT Journal
Press Release
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ltspice
- LTM4676 Demo Circuit - Dual 13A µModule Buck Regulator with Digital Interface for Control & Monitoring (4.5-26.5V to 1V @ 13A & 1.8V @ 13A)
- LTM4676 Demo Circuit - High Efficiency, Poly-Phase µModule Step-Down Regulator with Power System Management (5.75-16V to 1V @ 100A)
- LTM4676 Demo Circuit - High Efficiency, Poly-Phase µModule Step-Down Regulator with Power System Management (5.75-16V to 1V @ 50A)
- LTM4676 Demo Circuit - Poly-Phase µModule Step-Down Regulator with Power System Management (5.75-16V to 1V @ 75A)
- LTM4676 Demo Circuit - Single 26A µModule Buck Regulator with Digital Interface for Control & Monitoring (4.5-16V to 1V @ 26A)
- LTM4676/LTM4620A Demo Circuit - High Current, Parallel µModule Buck Regulators with Power System Management (4.5-16V to 1V @100A)
- LTM4676/LTM4630 Demo Circuit - High Current, Parallel µModule Buck Regulators with Power System Management (4.5-16V to 1V @130A)
LTpowerCAD
- LTM4676 Project - 100A PolyPhase Step-Down μModule Regulator (4.5-16V to 1V @ 100A)
- LTM4676 Project - 26A Step-Down μModule Regulator (4.5-16V to 1.2V @ 26A)
- LTM4676 Project - 50A PolyPhase Step-Down μModule Regulator (4.5-16V to 1V @ 50A)
- LTM4676 Project - 75A PolyPhase Step-Down μModule Regulator (4.5-16V to 1V @ 75A)
- LTM4676 Project - Dual Step-Down μModule Regulator (4.5-14V to 1V @ 13A & 1.8V @ 13A)
Linduino
Features
- Order Custom Programmed Parts
- Dual, Fast, Analog Loops with Digital Interface for Control and Monitoring
- Wide Input Voltage Range: 4.5V to 26.5V
- Output Voltage Range: 0.5V to 5.4V (4V on VOUT0)
- ±1% 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
- Constant Frequency Current Mode Control
- Parallel and Current Share Multiple Modules
- 16 Slave Addresses; Rail/Global Addressing
- 16mm × 16mm × 5.01mm BGA Package
- Download LTpowerPlay Software
Readable Data:
- Input and Output Voltages, Currents, and Temperatures
- Running Peak Values, Uptime, Faults and Warnings
- Onboard EEPROM Fault Log Record
Writable Data and Configurable Parameters:
- Output Voltage, Voltage Sequencing and Margining
- Digital Soft-Start/Stop Ramp
- OV/UV/OT, UVLO, Frequency and Phasing
Typical Application
Description
The LTM®4676 is a dual 13A or single 26A step-down uModule® (power module) DC/DC regulator featuring remote configurability and telemetry-monitoring of power management parameters over PMBus— an open standard I2C-based digital interface protocol . The LTM4676 is comprised of fast analog control loops, precision mixedsignal circuitry, EEPROM, power MOSFETs, inductors and supporting components.
The LTM4676’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. Custom configuration of the EEPROM contents is not required. 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.
The LTM4676 is offered in a 16mm × 16mm × 5.01mm BGA package available with SnPb or RoHS compliant terminal finish.
| 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. | ||||
16mm x 16mm x 5.01mm BGA
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTM4676EY#PBF | BGA | 144 | E | $47.93 | $33.55 |
| LTM4676IY#PBF | BGA | 144 | I | $52.73 | $36.91 |
| LTM4676AEY#PBF | BGA | 144 | E | $48.50 | $33.95 |
| LTM4676AIY#PBF | BGA | 144 | I | $53.34 | $37.34 |
| LTM4676IY | BGA | 144 | I | $69.18 | $48.43 |
| LTM4676AIY | BGA | 144 | I | $69.80 | $48.86 |
| LTM4676AEY#PBF-ES | BGA | 144 | E | $48.50 | $33.95 |
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-A | LTM4676 Demo Board | Dual Output, μModule Buck with PMBus, 4.5V ≤ VIN ≤ 26.5V, Vout0/Vout1 = 1V/1.8V @ 13A | $65.00 | |
| DC1811B-KIT | LTM4676 with DC1613A Demo Kit | LTM4676 (DC1811) with USB-to-PMBus Adapter (DC1613A) | $115.00 | |
| DC2087A | LTM4676 Demo Board | Buck µModule, 4.5V ≤ VIN ≤ 16V, Vout = 1V @ 26A | $65.00 | |
| DC2269A-A | LTM4676 Plug-In Demo Board | 1.5"x1.2" with Edge Connector, Dual 13A Buck μModule with PMBus, 4.5V ≤ VIN ≤ 26.5V, Vout0 = 1V @ 13A, Vout1 = 1.8V @ 13A | $65.00 |
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 |