Jian Li, Yingyi Yan and Marvin Macairan have published a Design Note based on LTM4675 dual DC/DC regulator.
The LTM4675 is a dual 9A or single 18A step-down μModule (micromodule) DC/DC regulator featuring remote configurability and telemetry monitoring of power system management (PSM) parameters over PMBus—an open standard I2C-based digital interface protocol. Its 16mm × 11.9mm × 3.51mm BGA package includes analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors, and supporting components. It features a wide 4.5V to 17V input voltage range, and a 0.5V to 5.5V output voltage range with ±0.5% DC accuracy over temperature. LTM4675’s power outputs can be digitally adjusted, margined, and powered up/down at programmable slew rates and sequencing delay times. Maximum turn-on time is 70ms. Telemetry read back parameters include VIN, IIN, VOUT, IOUT, temperature, running peak values, uptime, faults, and warnings. Current read back accuracy is ±2.5% at 9A load over temperature.
LTC Design Note: Dual 9A, step-down μModule regulator with digital power system management – [Link]