STMicroelectronics, Inc. Dc/dc Conv, Sync Buck, 500Khz, 150Deg C; Topology Stmicroelectronics ST1S50PUR

The ST1S50 is a synchronous step-down DC/DC converter designed for high efficiency, particularly at light loads. It supports an input voltage range of 4.0 V to 18 V and can deliver an output current of up to 4 A. The output voltage is adjustable from 0.8 V to 0.88 times the input voltage, making it suitable for various applications including point-of-load supplies for set-top boxes, TVs, and solid-state drives. This device operates at a fixed switching frequency of 500 kHz and integrates power MOSFETs with low on-resistances of 95 mOc for the high-side switch and 69 mOc for the synchronous rectifier, contributing to its high efficiency. Additional features include programmable soft-start, enable functionality, cycle-by-cycle current limiting, and short-circuit protection. The ST1S50 is packaged in a compact VFDFPN10 (3 x 3 x 1 mm) form factor, making it suitable for space-constrained designs.