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LM2577  Product Folder

SIMPLE SWITCHER Step-Up Voltage Regulator
  

See Also:		   
LM2585 - HIGHER SWITCHING FREQUENCY (100kHz - 200kHz)
     LM2586 - ADDITIONAL FEATURES, HIGHER SWITCHING FREQUENCY (100kHz - 200kHz)
     LM5000 - HIGHER FREQUENCY (300KHZ TO 1.25MHZ), 2A 80V INTEGRATED SWITCH IN SMALLER PACKAGE
Generic P/N 2577
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing		 Reliability
Metrics		 Design
Tools		 Application
Notes

WEBENCH Live Simulation!
LM2577 Webench™ Custom
Design/Analyze/Build It
 
3.5 <=		 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) 3.50 
InputMax Voltage (Volt) 40 
Output Current (mA) 3000 
Output Voltage (Volt) 12, 15 
Adjustable Output No, Yes 
Output Range Undefined, 1.23V min. 
Switching Frequency (Hz) 52000 
Adj Switch Frequency No 
Sync Pin No 
Efficiency (%) 80 
Flyback Yes 
Inverting No 
Step-Up Yes 
Step-Down No 
RegType Switching Regulator 
-

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LM1577 LM2577 Series SIMPLE SWITCHER Step-Up Voltage Regulator 889 Kbytes 29-Jun-99 View Online Download Receive via Email
LM1577 LM2577 Series SIMPLE SWITCHER Step-Up Voltage Regulator (JAPANESE)
 1149 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
LM2577M-12SOIC WIDE24StatusFull productionN/AN/ASamples
Buy Now		1K+$3.12rail
of
30		NSUZXYTT
LM2577M
-12 P+
8-10 weeks20000
LM2577M-15SOIC WIDE24StatusFull productionN/AN/ASamples1K+$3.12rail
of
30		NSUZXYTT
LM2577M
-15 P+
8-10 weeks25000
LM2577M-ADJSOIC WIDE24StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.12rail
of
30		NSUZXYTT
LM2577M
-ADJ P+
8-10 weeks15000
LM2577MX-12SOIC WIDE24StatusFull productionN/AN/A 
Buy Now 		1K+$3.12reel
of
1000		NSUZXYTT
LM2577M
-12 P+
8-10 weeks20000
LM2577MX-15SOIC WIDE24StatusFull productionN/AN/A 1K+$3.12reel
of
1000		NSUZXYTT
LM2577M
-15 P+
8-10 weeks25000
LM2577MX-ADJSOIC WIDE24StatusFull productionN/AN/A 
Buy Now 		1K+$3.12reel
of
1000		NSUZXYTT
LM2577M
-ADJ P+
8-10 weeks15000
LM2577N-12MDIP16StatusFull productionN/AN/A24 Hour Samples
Buy Now		1K+$3.12rail
of
20		NSUZXYYTT
LM2577N-12
P+
8-10 weeks20000
LM2577N-15MDIP16StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.12rail
of
20		NSUZXYYTT
LM2577N-15
P+
8-10 weeks25000
LM2577N-ADJMDIP16StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.12rail
of
20		NSUZXYYTT
LM2577N-ADJ
P+
8-10 weeks25000
LM2577T-12TO 2205StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.12rail
of
45		NSUZXYTT
LM2577T-12
P+
8-10 weeks10000
LM2577T-15TO 2205StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.12rail
of
45		NSUZXYTT
LM2577T-15
P+
8-10 weeks25000
LM2577T-ADJTO 2205StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.12rail
of
45		NSUZXYTT
LM2577T
-ADJ
P+
9-11 weeks50000
LM2577S-12TO 2635StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.12rail
of
45		NSUZXYTT
LM2577S
-12 P+
13-15 weeks25000
LM2577S-15TO 2635StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.12rail
of
45		NSUZXYTT
LM2577S
-15 P+
13-15 weeks25000
LM2577S-ADJTO 2635StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$3.12rail
of
45		NSUZXYTT
LM2577S
-ADJ P+
13-15 weeks25000
LM2577SX-12TO 2635StatusFull productionN/AN/A 1K+$3.12reel
of
500		NSUZXYTT
LM2577S
-12 P+
13-15 weeks25000
LM2577SX-15TO 2635StatusFull productionN/AN/A 
Buy Now		1K+$3.12reel
of
500		NSUZXYTT
LM2577S
-15 P+
13-15 weeks25000
LM2577SX-ADJTO 2635StatusFull productionN/AN/A 
Buy Now 		1K+$3.12reel
of
500		NSUZXYTT
LM2577S
-ADJ P+
13-15 weeks25000
LM2577-ADJ MDCUnpackaged DieFull productionN/AN/A   tray
of
N/A		-
N/A0
LM2577-ADJ MWCWaferFull productionN/AN/A   wafer jar
of
N/A		-
N/A0

General Description

The LM1577/LM2577 are monolithic integrated circuits that provide all of the power and control functions for step-up (boost), flyback, and forward converter switching regulators. The device is available in three different output voltage versions: 12V, 15V, and adjustable.

Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Listed in this data sheet are a family of standard inductors and flyback transformers designed to work with these switching regulators.

Included on the chip is a 3.0A NPN switch and its associated protection circuitry, consisting of current and thermal limiting, and undervoltage lockout. Other features include a 52 kHz fixed-frequency oscillator that requires no external components, a soft start mode to reduce in-rush current during start-up, and current mode control for improved rejection of input voltage and output load transients.

Features

  • Requires few external components
  • NPN output switches 3.0A, can stand off 65V
  • Wide input voltage range: 3.5V to 40V
  • Current-mode operation for improved transient response, line regulation, and current limit
  • 52 kHz internal oscillator
  • Soft-start function reduces in-rush current during start-up
  • Output switch protected by current limit, under-voltage lockout, and thermal shutdown

Applications

  • Simple boost regulator
  • Flyback and forward regulators
  • Multiple-output regulator

Reliability Metrics

Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LM2577-ADJ MDCSLM0350000015000003424108012
LM2577-ADJ MWCSLM0350000015000003424108012
LM2577M-12SLM0350000015000003424108012
LM2577M-15SLM0350000015000003424108012
LM2577M-ADJSLM0350000015000003424108012
LM2577MX-12SLM0350000015000003424108012
LM2577MX-15SLM0350000015000003424108012
LM2577MX-ADJSLM0350000015000003424108012
LM2577N-12SLM0350000015000003424108012
LM2577N-15SLM0350000015000003424108012
LM2577N-ADJSLM0350000015000003424108012
LM2577S-12SLM0350000015000003424108012
LM2577S-15SLM0350000015000003424108012
LM2577S-ADJSLM0350000015000003424108012
LM2577SX-12SLM0350000015000003424108012
LM2577SX-15SLM0350000015000003424108012
LM2577SX-ADJSLM0350000015000003424108012
LM2577T-12SLM0350000015000003424108012
LM2577T-15SLM0350000015000003424108012
LM2577T-ADJSLM0350000015000003424108012

For more information on Reliablitity Metrics, please click here.


Design Tools

TitleSize in KbytesDate
View Online
Download
Receive via Email
SimpleSwitcher® DC-DC Converters Design Software 9 Kbytes 28-Jul-2003 View    

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Application Notes

TitleSize in KbytesDate
View Online
Download
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-1149: Application Note 1149 Layout Guidelines for Switching Power Supplies 113 Kbytes 26-Sep-02 View Online Download Receive via Email
AN-1229: Application Note 1229 SIMPLE SWITCHER PCB Layout Guidelines 229 Kbytes 1-Oct-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
AN-776: Application Note 776 20 Watt Simple Switcher Forward Converter 459 Kbytes 26-Sep-02 View Online Download Receive via Email
AN-777: Application Note 777 LM2577 Three Output, Isolated Flyback Regulator 112 Kbytes 26-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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