SCT2A23A Datasheet | SCT

芯洲科技 Silicon Content Technology Rev.1.1 4.5V-100V Vin, 1.2A, Step-down DCDC Converter Features - Wide Input Range: 4.5V-100V - 1.2A Continuous Output Current - 2.75A peak current limit - Integrated 600mΩ High-Side and 300mΩ Low- Side Power MOSFETs - 15u A Quiescent Current with VCC diode 160u A Quiescent Current without VCC diode - Selectable PFM, USM and FPWM Operation Modes - 1.2V ±2% Feedback Reference Voltage - 4.3ms Internal Soft-start Time - Fixed Switching Frequency at 300KHz - COT Control Mode - FPWM mode support Iso-buck Topology - Precision Enable Threshold for Programmable Input Voltage Under-Voltage Lock Out Protection (UVLO) Threshold and Hysteresis - Cycle-by-Cycle Current Limit - Over-Voltage Protection - Over-Temperature Protection - Available in an ESOP-8 Package DESCRIPTION The SCT2A23A is 1.2A Step-down DCDC converter with wide input voltage, ranging from 4.5V to 100V, which integrates an 600mΩ high-side MOSFET and a 300mΩ low-side MOSFET. The SCT2A23A, adopting the constant-on time (COT) mode control, supports the PFM mode with typical 160u A low quiescent current which assists the converter on achieving high efficiency at light load or standby condition. The SCT2A23A Features selectable operation mode at light load, which provides the flexibility to select Pulse Frequency Modulation (PFM) to achieve high efficiency at the light-load, Ultrasonic Mode (USM) to keep the switching frequency above audible frequency areas during light-load conditions, and forced Pulse Width Modulation (FPWM) to achieve smaller output ripple and support isolation buck topology. The SCT2A23A offers cycle-by-cycle current limit protection, thermal shutdown protection, output overvoltage protection and over temperature protection. The device is available in an 8-pin thermally enhanced ESOP-8 package. APPLICATIONS...