600 mA adjustable buck in a rework-friendly SOIC
The MAX887HESA+ is a 600 mA adjustable step-down (buck) switching regulator from Analog Devices, operating from a 3.5 V to 11 V input range and switching at 250 kHz to 350 kHz. Its output is adjustable from a 1.25 V minimum up to 10.5 V maximum, and it includes a synchronous rectifier, which improves efficiency by replacing the freewheeling diode with a low-Rds(on) FET.
What the switching frequency and output range mean for your rail
The 250 kHz to 350 kHz switching frequency sets the inductor and capacitor values: lower frequencies use larger magnetics but less switching loss; higher frequencies shrink the filter components but increase core and gate-drive losses. With an adjustable output from 1.25 V to 10.5 V, this single regulator can serve multiple rail voltages in a design — just change the feedback resistor divider — without a board spin.