南芯产品规格书SC8723.pdf

SC8723 PRELIMINARY SPEC SOUTHCHIP SEMICONDUCTOR SOUTHCHIP CONFIDENTIAL, SUBJECT TO CHANGE SC8723 High Efficiency, Synchronous, 3.5A Buck-Boost Converter with Four Integrated MOSFETs 1 Descriptions 2 Features SC8723 is a synchronous 4-switch buck-boost converter • High Efficiency Buck-Boost Conversion with four integrated switches. It provides excellent power • Few External Components efficiency and voltage regulation no matter the output • Integrated Low RDS(ON) Switches voltage is higher, lower or equal to the input voltage. • Wide VIN Range: 2.7 V to 24 V SC8723 supports very wide input and output voltage range. • Wide VOUT Range:3V to 22V It can support applications from 2.7V to 24V input range and • Fixed 5.1V VOUT with FB tied to GND 3V to 22V output range and provides up to 3.5A output • Up to 3.5A Output Current current. • 250K/500K/750K/1MHz Adjustable Switching Frequency SC8723 employs average current-mode control. The output • Adjustable Output Current Limit voltage is adjusted by FB pin with resistors. The switching • Forced PWM Mode/ PSM Mode Selectable mode (PSM /FPWM) and the switching frequency can be • EN control and Programmable UVLO adjusted by external setting. The device also provides • Internal Soft Start programmable output current limit which supports flexible • Absolute Input and Output Over Voltage Protection design for different