General Description
The MAX5003 high-voltage switching power-supply controller has all the features and building blocks needed for a cost-effective flyback and forward voltagemode control converter.

Features
♦ Wide Input Range: 11V to 110V
♦ Internal High-Voltage Startup Circuit
♦ Externally Adjustable Settings
   Output Switch Current Limit
   Oscillator Frequency
   Soft-Start
   Undervoltage Lockout
   Maximum Duty Cycle
♦ Low External Component Count
♦ External Frequency Synchronization
♦ Primary or Secondary Regulation
♦ Input Feed-Forward for Fast Line-Transient
   Response
♦ Precision ±2.5% Reference over Rated
   Temperature Range
♦ Thermal Shutdown

Applications
   Telecommunication Power Supplies
   ISDN Power Supplies
   +42V Automobile Systems
   High-Voltage Power-Supply Modules
   Industrial Power Supplies