Buck controller in a 28QSOP — what it is and where it fits
The MAX1845EEI+T from Analog Devices is a step-down (buck) switching regulator controller. It is designed to drive external MOSFETs for point-of-load regulation in systems where a single supply rail needs to be stepped down efficiently — think networking gear, base stations, or industrial power distribution boards that run a 12 V or 5 V bus and need a lower-voltage rail for logic or I/O.
Active lifecycle and packaging options
It ships ROHS3 compliant. Store the reels dry — MSL level is not stated in this listing, but a 28QSOP is typically MSL 3, so bake before reflow if the moisture-barrier bag has been open past the floor-life window.