MAX5070, MAX5071

High-Performance, Single-Ended, Current-Mode PWM Controllers

1MHz, Single-Ended, Current-Mode PWM Controllers Pin Compatible with UC2842/UC2844 Series
 Overview   Technical Documents   Ordering Info   Related Products   User Comments (0)   All   


Status Explanations for product status codes

Active: In Production.

Description

The MAX5070/MAX5071 BiCMOS, high-performance, current-mode PWM controllers have all the features required for wide input voltage range isolated/nonisolated power supplies. These controllers are used for low- and high-power universal input voltage and telecom power supplies.

The MAX5070/MAX5071 contain a fast comparator with only 60ns typical delay from current sense to the output for overcurrent protection. The MAX5070A/MAX5070B have an integrated error amplifier with the output at COMP. Soft-start is achieved by controlling the COMP voltage rise using external components.

The frequency is adjustable from 20kHz to 1MHz with an external resistor and capacitor. The timing capacitor discharge current is trimmed allowing for programmable dead time and maximum duty cycle for a given frequency. The available saw-toothed waveform at RTCT can be used for slope compensation when needed.

The MAX5071A/MAX5071B include a bidirectional synchronization circuit allowing for multiple controllers to run at the same frequency to avoid beat frequencies. Synchronization is accomplished by simply connecting the SYNC pins of all devices together. When synchronizing with other devices, the MAX5071A/MAX5071B with the highest frequency synchronizes the other devices. Alternatively, the MAX5071A/MAX5071B can be synchronized to an external clock with an opendrain output stage running at a higher frequency.

The MAX5071C provides a clock output pulse (ADV_CLK) that leads the driver output (OUT) by 110ns. The advanced clock signal is used to drive the secondary-side synchronous rectifiers.

The MAX5070/MAX5071 are available in 8-pin µMAX® and SO packages and operate over the automotive temperature range of -40°C to +125°C.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 3 (PDF, 376kB)
Send this datasheet to any email addressE-Mail

Key Features

  • Pin-for-Pin Replacement for UC2842 (MAX5070A) and UC2844 (MAX5070B)
  • 2A Drive Source and 1A Sink Capability
  • Up to 1MHz Switching Frequency Operation
  • Bidirectional Synchronization (MAX5071A/MAX5071B)
  • Advanced Output Drive for Secondary-Side Synchronous Rectification (MAX5071C)
  • Fast 60ns Cycle-by-Cycle Current Limit
  • Trimmed Oscillator Capacitor Discharge Current Sets Maximum Duty Cycle Accurately
  • Accurate 5% Start and Stop Voltage with 6V Hysteresis
  • Low 32µA Startup Current
  • 5V Regulator Output (VREF) with 20mA Capability
  • Overtemperature Shutdown
 

Applications/Uses

  • Computer Systems/Servers
  • Industrial Power Conversion
  • Isolated Keep-Alive Circuits
  • Isolated Power Supplies
  • Isolated Telecom Power Supplies
  • Networking Systems
  • Universal Input AC/DC Power Supplies
   

Key Specifications:

Isolated Power Supplies
Part Number VIN
(V)		 VIN
(V)		 Topology Cntrl. Loop Feedback Freq.
(kHz)		 Duty Cycle
(%)		 ISTARTUP
(mA)		 ICC
(mA)		 Gate Drive Current
(A)		 Oper. Temp.
(°C)		 Budgetary Price
min max min max max max max See Notes
MAX5070  11 26.5
Flyback
Single-Ended Forward
 Current Mode
Linear
Opto
 1000
50
100
 0.032 3 2 -40 to +125 $1.09 @1k
MAX5071  Single-Ended Forward $1.18 @1k
See All Isolated Power Supplies (20)
Pricing 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

MAX5070: Pin Configuration
Pin Configuration

MAX5071: Pin Configuration
Pin Configuration

Reliability Reports

Show FIT data for:
Request Reliability Report for:

Software/Models

none

Ordering Information

Filters: Part Number: Package: Temperature: Tape and Reel Sample
Part Number Free
Sample		 Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX5070AASA    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis
MAX5070AASA+  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5070AASA+T    
Active N.SO;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX5070AASA-T    
Active N.SO;8 pin

Land Pattern: Not Available

-40°C to +125°C See data sheet
MAX5070AAUA    
Active µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis
MAX5070AAUA+  
Active µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5070AAUA+T    
Active uMAX;8 pin

Land Pattern: Not Available

-40°C to +125°C See data sheet
MAX5070AAUA-T    
Active uMAX;8 pin

Land Pattern: Not Available

-40°C to +125°C See data sheet
MAX5070BASA    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis
MAX5070BASA+  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
Part Number Free
Sample		 Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX5070BASA+T    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5070BASA-T    
Active N.SO;8 pin

Land Pattern: Not Available

-40°C to +125°C See data sheet
MAX5070BAUA    
Active µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
-40°C to +125°C RoHS/Lead-Free: No
Materials Analysis
MAX5070BAUA+  
Active µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
-40°C to +125°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5070BAUA+T    
Active uMAX;8 pin

Land Pattern: Not Available

-40°C to +125°C See data sheet
MAX5070BAUA-T    
Active uMAX;8 pin

Land Pattern: Not Available

-40°C to +125°C See data sheet
MAX5071AASA    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5071AASA+  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5071AASA+T    
Active N.SO;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX5071AASA-T    
Active N.SO;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
Part Number Free
Sample		 Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX5071AAUA    
Active µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5071AAUA+  
Active µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5071AAUA+T    
Active µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5071AAUA-T    
Active uMAX;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX5071BASA    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5071BASA+  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5071BASA+T    
Active N.SO;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX5071BASA-T    
Active N.SO;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX5071BAUA    
Active µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5071BAUA+    
Active µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
Part Number Free
Sample		 Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX5071BAUA+T    
Active uMAX;

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX5071BAUA-T    
Active uMAX;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX5071CASA    
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5071CASA+  
Active SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5071CASA+T    
Active N.SO;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX5071CASA-T    
Active N.SO;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX5071CAUA    
Active µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5071CAUA+  
Active µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5071CAUA+T    
Active uMAX;

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX5071CAUA-T    
Active uMAX;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet

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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

Similar Products by Function

MAX5021, MAX5022 Current-Mode PWM Controllers for Isolated Power Supplies
MAX5052, MAX5052A, MAX5052B, ... Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies
MAX5068 High-Frequency, Current-Mode PWM Controller with Accurate Programmable Oscillator
MAX5069 High-Frequency, Current-Mode PWM Controller with Accurate Oscillator and Dual FET Drivers
See All Isolated Power Supplies (33 Products)

Similar Products by Application

Computers: Desktops and Workstations > Isolated High-Voltage Power Supplies
Infusion Pumps > Isolated Power Supply
IP Phones > Power Supply Products for PD
IP Phones > Power Supply Products for PSE
Power Solutions for Nonportable Applications > Isolated DC-DC Conversion
Power Solutions for Nonportable Applications > Isolated AC-DC Conversion
Programmable Logic Controllers (PLCs) > Isolated Interface Power
Telecom Switches (PBX and Central Office) > Isolated High-Voltage Power Supplies
Transport Nodes, Access Nodes, Add/Drop Multiplexers, and Digital Cross-Connects > Isolated High-Voltage Power Supplies

More Information

New Product Press Release [ 2004-05-03 ]


Didn't Find What You Need?

Next Day Product Selection Assistance from Applications Engineers
Parametric Search
Applications Help

Information Index

Overview

  

Technical Documents

  

Ordering Info

  

Related Products

  
Description
Key Features
Applications/Uses
Key Specifications
Diagram
Notes and Comments
  Data Sheet
Application Notes
Evaluation Kits
Product Guides
Reliability Reports
Software/Models
  Price and Availability
Samples
Buy Online
Package Information
Lead-Free Information
  Similar Products by Function
Similar Products by Application
Evaluation Kits
Products with Similar Part Numbers
Products Used With This
 
Document Ref.: 19-3283 Rev 3; 2006-10-23
This page last modified: 2009-10-12

 


Contact Us     |     Privacy Policy     |     Legal Notices
Copyright © 2012 by Maxim Integrated Products