Overview
The LTM4678EY#PBF is a dual 25A or single 50A step-down µModule (power module) DC/DC regulator produced by Analog Devices Inc. This device features remote configurability and telemetry-monitoring of power management parameters over PMBus, an open standard I2C-based digital interface protocol. The LTM4678 integrates digitally programmable analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors, and supporting components. It is designed to provide high accuracy and flexibility in power management applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | 16 | V | |
| Output Voltage Range | 0.5 | 3.4 | V | |
| Output Current (Dual Channel) | 25 | A | ||
| Output Current (Single Channel) | 50 | A | ||
| DC Output Error Over Temperature | ±0.5% | |||
| Current Readback Accuracy | ±3.5% | |||
| Switching Frequency | 350 | 400 | kHz | |
| Operating Temperature Range | -40 | 125 | °C | |
| Package Type | CoP-BGA (16mm × 16mm × 5.86mm) |
Key Features
- Dual 25A or single 50A step-down µModule regulator with remote configurability and telemetry-monitoring over PMBus.
- Digitally programmable analog control loops and precision mixed-signal circuitry.
- Integrated input current sense amplifier and sub-milliohm DCR current sensing.
- 400kHz PMBus-compliant I2C serial interface with support for telemetry polling rates up to 125Hz.
- Integrated 16-bit ∆Σ ADC and constant frequency current mode control.
- Parallel and current share up to 250A.
- LTpowerPlay® GUI and DC1613 USB-to-PMBus converter and demo kits available.
Applications
- Dual digitally adjustable analog loops with digital interface for control and monitoring.
- High-power computing and data center applications.
- Telecommunications and networking equipment.
- Industrial control systems and automation.
- Medical devices requiring high accuracy power management.
Q & A
- What is the input voltage range of the LTM4678? The input voltage range is from 4.5V to 16V.
- What are the output voltage and current capabilities of the LTM4678? The LTM4678 can provide dual 25A or single 50A output, with an output voltage range of 0.5V to 3.4V.
- What is the accuracy of the DC output voltage over temperature? The DC output error over temperature is ±0.5%.
- How does the LTM4678 support telemetry and monitoring? The LTM4678 supports telemetry-monitoring of power management parameters over PMBus, an open standard I2C-based digital interface protocol.
- What is the switching frequency of the LTM4678? The switching frequency is up to 400kHz.
- What is the operating temperature range of the LTM4678? The operating temperature range is from -40°C to 125°C.
- What package type is the LTM4678 available in? The LTM4678 is available in a CoP-BGA package (16mm × 16mm × 5.86mm).
- Does the LTM4678 support parallel and current sharing? Yes, it supports parallel and current share up to 250A.
- Are there any specific tools or software available for configuring the LTM4678? Yes, the LTpowerPlay® GUI and DC1613 USB-to-PMBus converter and demo kits are available.
- What is the current readback accuracy of the LTM4678? The current readback accuracy is ±3.5% from -20°C to 125°C.
