onsemi Switching Regulator, Surface Mount, 3.85 → 4.1V dc Output Voltage, 9.5 → 28V dc Input Voltage, 1

High Voltage Start-Up Circuit
Critical conduction mode with current controlled frequency foldback
Integrated Input Filter Capacitor (X2) Discharge Circuitry
Dynamic Response Enhancer
Soft Overvoltage Protection
-500 mA/+800 mA Drive Capability
AC Line Brownout Detection
Improved efficiency at light load and fast startup time
Optimizes conversion efficiency across load range
Improved light load efficiency and elimination of external resistors
Improved transient response for line and load steps
Reduces acoustic noise and stress in the event of an overvoltage fault
Supports wide range of MOSFETs and power levels
Protects boost stage power components during line fault conditions
Applications
Off-line power supplies
Lighting Ballast
LED Lighting Drivers and Power Supplies
End Products
All-In-One Computers
High Powered Adapters
Flat TV / LED-TV / LCD-TV / Plasma