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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