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LM2585  Product Folder

SIMPLE SWITCHER 3-Amp Flyback Regulator
  

See Also:		   
LM2700 - HIGHER FREQUENCY (600KHZ, 1.25MHZ), SMALLER PACKAGE, 3.6A SWITCH
     LM2623 - MINIATURE 2.2A SWITCH (A GRADE), LOW COST VERSATILE CONVERTER
     LM2586 - LM2585 W/ SYNCHRONIZABLE, ADJUSTBALE FREQ. AND SOFT START
     LM2587 - 5A VERSION OF LM2585
     LM5000 - HIGHER FREQUENCY (300KHZ TO 1.25MHZ), 2A 80V INTEGRATED SWITCH IN SMALLER PACKAGE
Generic P/N 2585
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing		 Reliability
Metrics		 Design
Tools		 Application
Notes

WEBENCH Live Simulation!
LM2585 Webench™ Custom
Design/Analyze/Build It
 
4.0 <=		 V in Lower
V		  
<=		 V in Upper
V		  
<= 40.0
V out 1.2 <= V <= 300.0
I out   A <= 3.00
Ambient Temperature °C <= 100

What is Webench?
  
Parametric Table
Temperature Min (deg C) -40 
Temperature Max (deg C) 125 
Multiple Output Capability Yes 
On/Off Pin No 
Error Flag No 
InputMin Voltage (Volt) 4 
InputMax Voltage (Volt) 40 
Output Current (mA) 3000 
Output Voltage (Volt) 12, 3.30, 5 
Adjustable Output No, Yes 
Output Range Undefined, 1.23V min. 
Switching Frequency (Hz) 100000 
Adj Switch Frequency No 
Sync Pin No 
Efficiency (%) 93, 76, 80 
Flyback Yes 
Inverting No 
Step-Up Yes 
Step-Down No 
RegType Switching Regulator 
-

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LM2585 SIMPLE SWITCHER 3A Flyback Regulator 628 Kbytes 14-Dec-01 View Online Download Receive via Email
LM2585 SIMPLE SWITCHER 3A Flyback Regulator (JAPANESE)
 359 Kbytes   View Online Download Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.

Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LM2585T-12TO 2205StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.17rail
of
45		NSUZXYTT
LM2585T
-12 P+
8-10 weeks10000
LM2585T-3.3TO 2205StatusFull productionN/AN/A24 Hour Samples
Buy Now		1K+$3.17rail
of
45		NSUZXYTT
LM2585T
-3.3 P+
8-10 weeks25000
LM2585T-5.0TO 2205StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.17rail
of
45		NSUZXYTT
LM2585T
-5.0 P+
8-10 weeks25000
LM2585T-ADJTO 2205StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.17rail
of
45		NSUZXYTT
LM2585T
-ADJ P+
8-10 weeks25000
LM2585S-12TO 2635StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.17rail
of
45		NSUZXYTT
LM2585S
-12 P+
13-15 weeks25000
LM2585S-3.3TO 2635StatusFull productionN/AN/A 
Buy Now 		1K+$3.17rail
of
45		NSUZXYTT
LM2585S
-3.3 P+
13-15 weeks25000
LM2585S-5.0TO 2635StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.17rail
of
45		NSUZXYTT
LM2585S
-5.0 P+
13-15 weeks25000
LM2585S-ADJTO 2635StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.17rail
of
45		NSUZXYTT
LM2585S
-ADJ P+
13-15 weeks25000
LM2585SX-12TO 2635StatusFull productionN/AN/A 
Buy Now		1K+$3.17reel
of
500		NSUZXYTT
LM2585S
-12 P+
13-15 weeks50000
LM2585SX-3.3TO 2635StatusFull productionN/AN/A 1K+$3.17reel
of
500		NSUZXYTT
LM2585S
-3.3 P+
13-15 weeks25000
LM2585SX-5.0TO 2635StatusFull productionN/AN/A 1K+$3.17reel
of
500		NSUZXYTT
LM2585S
-5.0 P+
13-15 weeks25000
LM2585SX-ADJTO 2635StatusFull productionN/AN/A 
Buy Now		1K+$3.17reel
of
500		NSUZXYTT
LM2585S
-ADJ P+
14-16 weeks25000
LM2585-12 MDCUnpackaged DieFull productionN/AN/A   gel pak
of
N/A		-
N/A0
LM2585-5.0 MDCUnpackaged DieFull productionN/AN/ASamples  gel pak
of
N/A		-
N/A0
LM2585-ADJ MDCUnpackaged DieFull productionN/AN/ASamples  gel pak
of
N/A		-
N/A0
LM2585-12 MWCWaferFull productionN/AN/A   wafer jar
of
N/A		-
N/A0
LM2585-5.0 MWCWaferFull productionN/AN/A   wafer jar
of
N/A		-
N/A0
LM2585-ADJ MWCWaferFull productionN/AN/A   wafer jar
of
N/A		-
N/A0

General Description

The LM2585 series of regulators are monolithic integrated circuits specifically designed for flyback, step-up (boost), and forward converter applications. The device is available in 4 different output voltage versions: 3.3V, 5.0V, 12V, and adjustable.

Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Included in the datasheet are typical circuits of boost and flyback regulators. Also listed are selector guides for diodes and capacitors and a family of standard inductors and flyback transformers designed to work with these switching regulators.

The power switch is a 3.0A NPN device that can stand-off 65V. Protecting the power switch are current and thermal limiting circuits, and an undervoltage lockout circuit. This IC contains a 100 kHz fixed-frequency internal oscillator that permits the use of small magnetics. Other features include soft start mode to reduce in-rush current during start up, current mode control for improved rejection of input voltage and output load transients and cycle-by-cycle current limiting. An output voltage tolerance of ±4%, within specified input voltages and output load conditions, is guaranteed for the power supply system.

Features

  • Requires few external components
  • Family of standard inductors and transformers
  • NPN output switches 3.0A, can stand off 65V
  • Wide input voltage range: 4V to 40V
  • Current-mode operation for improved transient response, line regulation, and current limit
  • 100 kHz switching frequency
  • Internal soft-start function reduces in-rush current during start-up
  • Output transistor protected by current limit, under voltage lockout, and thermal shutdown
  • System Output Voltage Tolerance of ±4% max over line and load conditions

Applications

  • Flyback regulator
  • Multiple-output regulator
  • Simple boost regulator
  • Forward converter

Reliability Metrics

Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LM2585-12 MDCSLM0350000015000003424108012
LM2585-12 MWCSLM0350000015000003424108012
LM2585-5.0 MDCSLM0350000015000003424108012
LM2585-5.0 MWCSLM0350000015000003424108012
LM2585-ADJ MDCSLM0350000015000003424108012
LM2585-ADJ MWCSLM0350000015000003424108012
LM2585S-12SLM0350000015000003424108012
LM2585S-3.3SLM0350000015000003424108012
LM2585S-5.0SLM0350000015000003424108012
LM2585S-ADJSLM0350000015000003424108012
LM2585SX-12SLM0350000015000003424108012
LM2585SX-3.3SLM0350000015000003424108012
LM2585SX-5.0SLM0350000015000003424108012
LM2585SX-ADJSLM0350000015000003424108012
LM2585T-12SLM0350000015000003424108012
LM2585T-3.3SLM0350000015000003424108012
LM2585T-5.0SLM0350000015000003424108012
LM2585T-ADJSLM0350000015000003424108012

For more information on Reliablitity Metrics, please click here.


Design Tools

TitleSize in KbytesDate
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SimpleSwitcher® DC-DC Converters Design Software 9 Kbytes 28-Jul-2003 View    

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Application Notes

TitleSize in KbytesDate
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Receive via Email
AN-1061: Application Note 1061 Power Conversion in Line-Powered Equipment 188 Kbytes 1-Oct-02 View Online Download Receive via Email
AN-1082: Application Note 1082 Adjust or Synchronize LM2586/88 Switching Frequency 50 Kbytes 18-Sep-02 View Online Download Receive via Email
AN-1095: Application Note 1095 Design of Isolated Converters Using Simple Switchers 398 Kbytes 26-Sep-02 View Online Download Receive via Email
AN-1149: Application Note 1149 Layout Guidelines for Switching Power Supplies 113 Kbytes 26-Sep-02 View Online Download Receive via Email
AN-1246: Application Note 1246 Stresses in Wide Input DC-DC Converters 272 Kbytes 26-Sep-02 View Online Download Receive via Email
AN-556: Application Note 556 Introduction to Power Supplies 159 Kbytes 25-Sep-02 View Online Download Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 15-Jan-2004]

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