General DescriptionThe 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

Manufacturer	Maxim Integrated
Product Category	AC DC Converters, Offline Switchers
Series	MAX5052A
Packaging	Tube Alternate Packaging
Mounting-Style	SMD/SMT
Package-Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Operating-Temperature	-40°C ~ 150°C (TJ)
Mounting-Type	*
Supplier-Device-Package	8-uMAX
Watt	-
Number-of-Outputs	1 Output
Output-Isolation	Either
Internal-Switch-s	No
Voltage-Breakdown	-
Topology	Boost, Flyback, SEPIC
Voltage-Start-Up	22V
Voltage-Supply-Vcc-Vdd	10.8 V ~ 24 V
Duty-Cycle	50%
Frequency-Switching	262kHz
Fault-Protection	Current Limiting, Over Temperature
Control-Features	EN
Maximum Operating Temperature	+ 85 C
Operating temperature range	- 40 C
Output-Current	1000 mA
Switching-Frequency	262 kHz
Part-#-Aliases	MAX5052A
Package-Case	USOP-8
Duty-Cycle-Max	50 %