DocumentationDatasheet
Application 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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LTpowerCAD
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. | ||||
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-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 |
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 |