The MC44603A is an enhanced high performance controller that is specifically designed for off−line and dc−to−dc converter applications. This device has the unique ability of automatically changing operating modes if the converter output is overloaded, unloaded, or shorted, offering the designer additional protection for increased system reliability.

Current or Voltage Mode Controller
•Operation up to 250 kHz Output Switching Frequency
•Inherent Feed Forward Compensation
•Latching PWM for Cycle−by−Cycle Current Limiting
•Oscillator with Precise Frequency Control