General Description
The MAX5019/MAX5020 integrate all the building blocks necessary for implementing DC-DC fixed-frequency power supplies. Either primary- or secondary side regulation may be used to implement isolated or nonisolated power supplies. These devices are current mode controllers with an integrated high-voltage startup circuit suitable for telecom/industrial voltage range power supplies. Current-mode control with leading edge blanking simplifies control-loop design and internal ramp compensation circuitry stabilizes the current loop when operating at duty cycles above 50% (MAX5019).

Features
♦ Wide Input Range: (18V to 110V) or (13V to 36V)
♦ Isolated (without optocoupler) or Nonisolated Power Supply
♦ Current-Mode Control
♦ Leading-Edge Blanking
♦ Internally Trimmed 275kHz ±10% Oscillator
♦ Low External Component Count
♦ Soft-Start
♦ High-Voltage Startup Circuit
♦ Pulse-by-Pulse Current Limiting
♦ Thermal Shutdown
♦ SO-8 Package

Applications
   Telecom Power Supplies
   Industrial Power Supplies
   Networking Power Supplies
   Isolated Power Supplies