Overview
The LTM4681IY#PBF, produced by Analog Devices Inc., is a highly advanced quad 31.25A or single 125A step-down µModule (power module) DC/DC regulator. This device features remote configurability and telemetry-monitoring of power management parameters over PMBus. It integrates digitally programmable analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors, and supporting components. The LTM4681 is designed for high-performance power management in various applications, offering a robust and flexible solution for complex power systems.
Key Specifications
| Parameter | Specification |
|---|---|
| Input Voltage Range | 4.5V to 16V |
| Output Voltage Range | 0.5V to 3.3V |
| Maximum DC Output Error Over Temperature | ±0.5% |
| Current Readback Accuracy | ±4% (0°C to 125°C) |
| Switching Frequency | Up to 350kHz |
| PMBus-Compliant Interface | 400kHz I2C Serial Interface |
| Telemetry Polling Rates | Up to 125Hz |
| Package Dimensions | 15mm × 22mm × 8.17mm BGA |
| Operating Temperature Range | –40°C to 125°C |
| Device Finish | SnPb (63/37) or RoHS compliant (SAC305) |
Key Features
- Digital power system management with PMBus interface
- Remote configurability and telemetry-monitoring of power management parameters
- Integrated input current sense amplifier and 16-bit ∆Σ ADC
- Support for parallel and current share multiple modules
- Configurable output array: quad 31.25A or single 125A
- Digital soft-start/stop ramp and programmable analog loop
- Overvoltage, undervoltage, overtemperature protection and UVLO
- Onboard EEPROM for fault log record and configurable parameters
- Cable drop compensation and current limit switches
Applications
- Multi-rail processor power and configurable core power
- High-performance computing and data center equipment
- Telecommunications and networking equipment
- Industrial control systems and automation
- Medical devices and healthcare equipment
Q & A
- What is the input voltage range of the LTM4681IY#PBF?
The input voltage range is from 4.5V to 16V.
- What are the output voltage and current capabilities of the LTM4681IY#PBF?
The output voltage range is from 0.5V to 3.3V, and it can deliver up to 125A in a single configuration or 31.25A in a quad configuration.
- Does the LTM4681IY#PBF support remote configuration and monitoring?
Yes, it supports remote configurability and telemetry-monitoring over PMBus.
- What is the switching frequency of the LTM4681IY#PBF?
The switching frequency can be up to 350kHz.
- What type of interface does the LTM4681IY#PBF use for communication?
It uses a 400kHz PMBus-compliant I2C serial interface.
- What are the dimensions of the LTM4681IY#PBF package?
The package dimensions are 15mm × 22mm × 8.17mm BGA.
- What is the operating temperature range of the LTM4681IY#PBF?
The operating temperature range is from –40°C to 125°C.
- Does the LTM4681IY#PBF have built-in protection features?
Yes, it includes overvoltage, undervoltage, overtemperature protection, and UVLO.
- Can the LTM4681IY#PBF be used in parallel or current share configurations?
Yes, it supports parallel and current share multiple modules.
- What tools are available for configuring and monitoring the LTM4681IY#PBF?
The LTpowerPlay GUI and DC1613 USB-to-PMBus converter are available for configuration and monitoring.
