CPU core power controller — what the specs mean for the BOM
The MAX1625ESE+T is a step-down (buck) switching controller designed to regulate a CPU core voltage from a 5 V supply rail. Synchronous rectification is built in, which improves efficiency at high output currents by replacing the freewheeling diode with a second MOSFET. The switching frequency is programmable from 100 kHz to 1 MHz — lower frequencies favour efficiency, higher frequencies shrink the inductor and output capacitor at the cost of switching losses. Control features include current limit, frequency control, reset, and soft start. The soft start prevents output voltage overshoot at power-up; the reset output can sequence a downstream load or flag the system controller when the output is in regulation.
Package, temperature grade, and compliance
ROHS3 compliant per — no restricted substances above the threshold limits.