The LTM®4677 is a dual 18A or single 36A step-down
μModule® (power module) DC/DC regulator with 40ms
turn-on time. It features remote configurability and
telemetry-monitoring of power management parameters
over PMBus— an open standard I2C-based digital interface protocol. The LTM4677 is comprised of fast analog
control loops, precision mixed-signal circuitry, EEPROM,
power MOSFETs, inductors and supporting components.
The LTM4677’s 2-wire serial interface allows outputs to be
margined, tuned and ramped up and down at programmable
slew rates with sequencing delay times. Input and output
currents and voltages, output power, temperatures, uptime
and peak values are readable. Custom configuration of
the EEPROM contents is not required. At start-up, output
voltages, switching frequency, and channel phase angle
assignments can be set by pin-strapping resistors. The
LTpowerPlay™ GUI and DC1613 USB-to-PMBus converter
and demo kits are available.
The LTM4677 is pin compatible with the LTM4676A (dual
13A) and is offered in a 16mm×16mm×5.01mm BGA package available with SnPb or RoHS compliant terminal finish.
