LTM4675IY

LTM4675IY is a dual 9A or single 18A step-down µModule® (micromodule) DC/DC regulator featuring a 40ms turn-on time. It offers remote configurability and telemetry monitoring of power management parameters over PMBus, an open standard I²C-based digital interface protocol. The LTM4675 comprises fast analogue control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors, and supporting components. Its 2-wire serial interface enables outputs to be margined, tuned, and ramped up and down at programmable slew rates with sequencing delay times. Readable parameters include input and output currents and voltages, output power, temperatures, uptime, and peak values. Custom configuration of the EEPROM contents is not required. During start-up, output voltages, switching frequency, and channel phase angle assignments can be set by pin-strapping resistors. Applications include system optimization in prototype and production.

• Dual, fast, analogue loops with digital interface for control and monitoring
• Wide input voltage range from 4.5V to 17V, output voltage range from 0.5V to 5.5V
• ±0.5% maximum DC output error over temperature, integrated 16bit ∆Σ ADC
• ±2.5% current readback accuracy at 9A load, 400KHz PMBus-compliant I²C serial interface
• Supports telemetry polling rates up to 125Hz, constant frequency current mode control
• Parallel and current share multiple modules
• Input and output voltages, currents, and temperatures
• Running peak values, uptime, faults and warnings
• Onboard EEPROM fault log record with ECC
• Internal operating temperature range from -40°C to 125°C, 108-lead BGA package

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