Overview
The LTM4677EY#PBF, produced by Analog Devices Inc., is a dual 18A or single 36A step-down µModule (power module) DC/DC regulator. This device is designed for high-current applications and features remote configurability and telemetry-monitoring of power management parameters over PMBus, an open standard I2C-based digital interface protocol. The LTM4677 includes fast analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors, and supporting components. It offers a 40ms turn-on time and supports a wide input voltage range of 4.5V to 16V, with output voltages adjustable from 0.5V to 1.8V.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | 16 | V | |
| Output Voltage Range | 0.5 | 1.8 | V | |
| Output Current (Dual Channel) | 18 | A | ||
| Output Current (Single Channel) | 36 | A | ||
| DC Output Error Over Temperature | ±0.5% | % | ||
| Current Readback Accuracy | ±2.5% | % | ||
| Switching Frequency | 400kHz | kHz | ||
| Package Dimensions | 16mm × 16mm × 5.01mm | mm | ||
| Operating Temperature Range | -40 | 125 | °C |
Key Features
- Remote configurability and telemetry-monitoring over PMBus (I2C-based digital interface protocol)
- Fast analog control loops and precision mixed-signal circuitry
- Integrated EEPROM, power MOSFETs, inductors, and supporting components
- Programmable slew rates and sequencing delay times
- Readable input and output currents, voltages, output power, temperatures, uptime, and peak values
- Onboard EEPROM fault log record with ECC
- Supports parallel and current share multiple modules
- Constant frequency current mode control
- Digital soft-start/stop ramp and voltage margining
- Overvoltage, undervoltage, and overtemperature protection
Applications
- Telecom systems
- Datacom systems
- Storage systems
- High-current power supplies in various industrial and commercial applications
Q & A
- What is the input voltage range of the LTM4677EY#PBF?
The input voltage range is from 4.5V to 16V.
- What are the output voltage and current capabilities of the LTM4677EY#PBF?
The output voltage range is from 0.5V to 1.8V, and it can deliver up to 18A per channel or 36A in a single channel configuration.
- What is the switching frequency of the LTM4677EY#PBF?
The switching frequency is 400kHz.
- Does the LTM4677EY#PBF support remote configuration and monitoring?
- What is the package size of the LTM4677EY#PBF?
The package dimensions are 16mm × 16mm × 5.01mm.
- What are the operating temperature ranges for the LTM4677EY#PBF?
The operating temperature range is from -40°C to 125°C.
- Does the LTM4677EY#PBF have built-in protection features?
- Can multiple LTM4677EY#PBF modules be used in parallel?
- What tools are available for configuring and monitoring the LTM4677EY#PBF?
The LTpowerPlay GUI and DC1613 USB-to-PMBus converter and demo kits are available.
- Is the LTM4677EY#PBF pin compatible with other models?
