The MC33363B is a monolithic high voltage switching regulator that is specifically designed to operate from a rectified 240 Vac line source. This integrated circuit features an on--chip 700 V/1.0 A SENSEFET power switch, 500 V active off--line startup FET, duty cycle controlled oscillator, current limiting comparator with a programmable threshold and leading edge blanking, latching pulse width modulator for double pulse suppression, high gain error amplifier, and a trimmed internal bandgap reference. Protective features include cycle--by--cycle current limiting, input undervoltage lockout with hysteresis, overvoltage protection, and thermal shutdown. This device is available in a 16--lead dual--in--line and wide body surface mount packages.

FEATUREs
• On--Chip 700 V, 1.0 A SENSEFET Power Switch
• Rectified 240 Vac Line Source Operation
• On--Chip 500 V Active Off--Line Startup FET
• Latching PWM for Double Pulse Suppression
• Cycle--By--Cycle Current Limiting
• Input Undervoltage Lockout with Hysteresis
• Over--Voltage Protection
• Trimmed Internal Bandgap Reference
• Internal Thermal Shutdown
• These are Pb--Free Devices*