The SP633 is a synchronous step-down switching regulator controller optimized for high efficiency.Thepartisdesignedtobeespeciallyattractiveforsinglesupplystepdownconversion from 5V to 24V. The SP633 is designed to drive a pair of external NFETs using a fixed300kHzfrequency,PWMvoltagemodearchitecture.ProtectionfeaturesincludeUVLO, thermal shutdown, output short circuit protection, and overcurrent protection with auto restart. The device also features a PWRGD output and an enable input. The SP633 is available in a space saving 6-pin QFN and offers excellent thermal performance. TYPICAL APPLICATION CIRCUIT