Datasheet Summary
FR9889 23V, 3A, 340KHz Synchronous Step-Down DC/DC Converter
Features
High Efficiency up to 95% Low Rds(on) Integrated Power MOSFET Internal pensation Function Internal Power Good Function Wide Input Voltage Range: 4.5V to 23V Adjustable Output Voltage Down to 0.925V 3A Output Current Fixed 340KHz Switching Frequency External Programmable Soft-Start or Internal 600µs Soft-Start PSM (High Efficiency at Light Load) Hiccup Short Circuit Protect
TYPICAL APPLICATION CIRCUIT
NAME
BST VIN LX GND FB PG SHDN SS
PIN DESCRIPTION
SOP8
DESCRIPTION
1 High Side Gate Drive Boost
2 Power Supply Input Pin 3 Power Switching Output
4,9 Ground
5 Voltage Feedback Input
6 Power Good Output
7 Enable...