Typical Application Circuit for LTM4677EY 36A, 1.2V Output DC/DC Module Regulator with I2C/SMBus/PMBus Serial Interface. The LTM4677 is a dual 18A or single 36A step-down Module DC/DC regulator featuring remote configurability and telemetry-monitoring of power management parameters over PMBUs - an open standard I2C-based digital interface protocol