Switching regulator — 1.5 A switch, 500 kHz, buck or SEPIC
The LT1376CS8#PBF is a current-mode step-down switching regulator from Analog Devices, rated for a 1.5 A switch current and a 500 kHz switching frequency. It accepts an input range of 5 V to 25 V and delivers an adjustable output from 2.42 V up to 21.5 V. The part supports both buck and SEPIC topologies — buck for a straightforward step-down with a single inductor, SEPIC when the output needs to sit above, below, or equal to the input rail, using a coupled inductor. No synchronous rectifier is included, so the external diode carries the catch current.
Package, temperature grade, and compliance
Housed in an 8-lead SOIC package (0.154" body width, 3.90 mm), the LT1376CS8#PBF is supplied in tube format. The junction temperature range is 0°C to 125°C — suitable for commercial and most industrial environments, but not rated for automotive under-hood duty. The part is ROHS3 compliant (no lead, no restricted substances per EU directive 2015/863).