General Description
The MAX5052/MAX5053 current-mode PWM controllers contain all the control circuitry required for the design of wide-input-voltage isolated and nonisolated power supplies. The MAX5052 is well suited for universal input (rectified 85VAC to 265VAC) or telecom (-36VDC to -72VDC) power supplies. The MAX5053 is well suited for low-input-voltage (10.8VDC to 24VDC) power supplies.

Features
♦ Available in a Tiny 8-Pin µMAX Package
♦ Current-Mode Control
♦ 50W Output Power
♦ Universal Offline Input Voltage Range
   Rectified 85VAC to 265VAC (MAX5052)
♦ VIN Directly Driven from 10.8V to 24V Input
   (MAX5053)
♦ Digital Soft-Start
♦ Programmable Input Startup Voltage
♦ Internal Bootstrap UVLO with Large Hysteresis
   (MAX5052)
♦ Internal Error Amplifier with 1% Accurate
   Reference
♦ Thermal Shutdown
♦ 45µA (typ) Startup Supply Current
♦ 1.4mA (typ) Operating Supply Current
♦ Fixed Switching Frequency of 262kHz ±12%
♦ 50% Maximum Duty-Cycle Limit
   (MAX5052A/MAX5053A)
♦ 75% Maximum Duty-Cycle Limit
   (MAX5052B/MAX5053B)
♦ 60ns Cycle-by-Cycle Current-Limit Response Time

Applications
   Universal Input AC Power Supplies
   Isolated Telecom Power Supplies
   Networking Systems
   Computer Systems/Servers
   Industrial Power Conversion
   Isolated Keep-Alive Circuits
   12V Boost Regulators
   12V SEPIC Regulators