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Maxim > Products > Power and Battery Management 
MAX5052, MAX5052A, MAX5052B, MAX5053, MAX5053A, MAX5053B
Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies

Isolated/Nonisolated Current-Mode PWM Controllers Work with Universal Offline, Telecom, or 12V Input Voltage


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Data Sheet
FULL DATA SHEET (PDF, 356kB)
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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.

The MAX5052/MAX5053 contain an internal error amplifier that regulates the tertiary winding output voltage. This implements a primary-side regulated, isolated power supply, eliminating the need for an optocoupler. An input undervoltage lockout (UVLO) is provided for programming the input-supply start voltage and to ensure proper operation during brownout conditions. The input-supply start voltage is externally programmable with a voltage-divider. To shutdown the device, the UVLO pin is pulled low. Internal digital soft-start reduces output voltage overshoot. The internal thermal shutdown circuit protects the device in the event the junction temperature exceeds +130°C.

The MAX5052 has an internal bootstrap UVLO with large hysteresis that requires a minimum voltage of 23.6V for startup. The MAX5053 does not have the internal bootstrap UVLO and can be biased directly from a minimum voltage of 10.8V.

Key Features   Applications/Uses
  • 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

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

    Key Specifications:   Isolated Power Supplies
    Part Number VIN (min) (V) VIN (max) (V) Topology Features Control Loop Feedback Type Frequency (kHz) Max. Duty Cycle (%) Start-Up Current (max) (mA) Operating Current, ICC (max) (mA) Gate Drive Current (A) Operating Temp. Range (°C) Price**
    MAX5052  21.6 375 Flyback
    Single-Ended Forward
    •High Voltage Start-Up Circuit
    •Internal Error Amplifier
    •Thermal Shutdown
    •UVLO
    		 Current Mode Linear
    Opto     		262 50
    75     		0.045 1.4 1 -40 to +85 $0.66 @ 1k
    MAX5053  10.8 24 $0.66 @ 1k
    See All Isolated Power Supplies (29)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX5052, MAX5053: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  		• Application Note 2043: A Compact, Isolated Power Supply, 48V to 3.3V at 7A - MAX5052A
  		• Application Note 2400: A Compact 36-72V DC Input, 3.3V/10A Output Power Supply - MAX5052, MAX5052A
  		• Application Note 3363: New Ethernet Systems Distribute DC Power with Data - MAX5052, MAX5053

    Evaluation Kits
  		• MAX5052AEVKIT

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-18 of 18

    MAX5052A Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX5052AEUA-G05  



    		-40°C to +85°C See data sheet
    MAX5052AEUA-TG05  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5052AEUA+T  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5052AEUA-T  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5052AEUA  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5052AEUA+  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5052B Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX5052BEUA+  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5052BEUA  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5052BEUA-T  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5052BEUA+T  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5053A Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX5053AEUA+T  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5053AEUA+  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5053AEUA-T  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5053AEUA  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5053B Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX5053BEUA-T  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5053BEUA  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5053BEUA+  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5053BEUA+T  
    		uMAX;8 pin;
    Dwg: 21-0036 (PDF)
    Use pkgcode/variation: U8+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• New Product Press Release 2002-11-06 

    Related Products
    MAX5021, MAX5022 Current-Mode PWM Controllers for Isolated Power Supplies

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     Description 
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    Document Ref.: 19-2590; Rev 1; 2004-03-11
    This page last modified: 2007-08-01




             


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