The MC33362 is a monolithic high voltage switching regulator that is specifically designed to operate from a rectified 120 VAC line source. This integrated circuit features an on−chip 500 V/2.0 A SENSEFET power switch, 250 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, output overvoltage protection, and thermal shutdown. This device is available in a 16−lead dual−in−line and wide body surface mount packages.

• On−Chip 500 V, 2.0 A SENSEFET Power Switch
• Rectified 120 VAC Line Source Operation
• On−Chip 250 V Active Off−Line Startup FET
• Latching PWM for Double Pulse Suppression
• Cycle−By−Cycle Current Limiting
• Input Undervoltage Lockout with Hysteresis
• Output Overvoltage Protection Comparator
• Trimmed Internal Bandgap Reference
• Internal Thermal Shutdown
• Pb−Free Packages are Available