LM2587   
SIMPLE SWITCHER® 5A Flyback Regulator 		Click link to Download

Features
•Requires few external components
•Family of standard inductors and transformers
•NPN output switches 5.0A, 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

Description

The LM2587 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 5.0A 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.

Applications
•Flyback regulator
•Multiple-output regulator
•Simple boost regulator
•Forward converter
WEBENCH Power Designer My Designs

LM2587
 
4.00 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 40.00
V out 1.23 <=  V <= 300.00
I out    A <= 5.00
Ambient Temperature  °C <= 100


What are WEBENCH® tools?

Also Recommended
LM2588▲LM2587 W/ Synchronizable Adjustable Frequency And Soft Start
LM3478▲Switching Controller For Higher Current Capability



MY BRIEFCASE                                     Remove all from My Briefcase 
Click any "Briefcase" icon to add an item

                                              LM2587
Drag-Select for Table Reset Graph
Also Recommended
LM2588▲LM2587 W/ Synchronizable Adjustable Frequency And Soft Start
LM3478▲Switching Controller For Higher Current Capability

Typical Application
click for larger image


Block Diagram
click for larger image



Typical Performance
*click for larger image


Paramaters / ValuesLM2587 LM2588 LM3478
Output Range1.23V min, 5V, 12V, 3.3V 1.23V min, 5V, 12V, 3.3V 1.26V min
Switch Current5 Amp 5 Amp
Input Min Voltage4 Volt 4 Volt 2.95 Volt
Input Max Voltage40 Volt 40 Volt 40 Volt
Feedback Voltage3.3, 1.23, 12, 5 Volt 3.3, 1.23, 12, 5 Volt 1.26 Volt
Frequency Max100 kHz 200 kHz 1000 kHz
Efficiency (peak)90, 75, 80 % 90, 75, 80 %
Sync PinNo Yes Yes
Adj Switch FrequencyNo Yes Yes
Frequency Min100 kHz 100 kHz 100 kHz
On/Off PinNo Yes Yes
Error FlagNo No No
SoftStartYes Yes Yes
Special FeaturesSIMPLE SWITCHER regulator SIMPLE SWITCHER regulator
TopologyBoost, Flyback Boost, Flyback Boost, Sepic, Flyback
Step-UpYes Yes Yes
InvertingNo No No
FlybackYes Yes Yes
RegTypeSwitching Regulator Switching Regulator Switching Controller
Adjustable OutputYes, No Yes, No Yes
Temperature Min-40 deg C -40 deg C -40 deg C
Temperature Max125 deg C 125 deg C 125 deg C
Regulator FamilySIMPLE SWITCHER SIMPLE SWITCHER

Datasheet
TitleSizeDateOther
Language
LM2587 SIMPLE SWITCHER® 5A Flyback Regulator819
Kbytes		6-Feb-04日本語


Featured Application Notes
TitleSizeDateOther
Language
AN-1082: Application Note 1082 Adjust or Synchronize LM2586/88 Switching Frequency50
Kbytes		4-Oct-04日本語
AN-1061: Application Note 1061 Power Conversion in Line-Powered Equipment162
Kbytes		1-Oct-02日本語


More Application Notes
TitleSizeDateOther
Language
AN-1095: Application Note 1095 Design of Isolated Converters Using Simple Switchers398
Kbytes		1-May-04日本語
中文
AN-116: Application Note 116 Use the LM158/LM258/LM358 Dual, Single Supply Op Amp101
Kbytes		1-Oct-02 

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2587T-12/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
AVNET-EMWorldwide155
DIGIKEYWorldwide110
NEWARKAmericas40
RS COMPONENTSWorldwide27
$4.17 each at 1K+ pcsrail
of
45
LM2587T-3.3/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide89
RS COMPONENTSWorldwide10
$4.17 each at 1K+ pcsrail
of
45
LM2587T-5.0/NOPB

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide51
FARNELLEurope and Asia88
FUTUREWorldwide66
RS COMPONENTSWorldwide5
$4.17 each at 1K+ pcsrail
of
45
LM2587T-ADJ/NOPB
LM2587T-ADJ

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide365
AVNET-EMWorldwide3
BRITESTONESouth Korea2
DIGIKEYWorldwide133
FARNELLEurope and Asia939
FUTUREWorldwide258
NEWARKAmericas93
RS COMPONENTSWorldwide23
$4.17 each at 1K+ pcsrail
of
45
LM2587S-12/NOPB

RoHS



TO-263		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
ARROWWorldwide95
DIGIKEYWorldwide31
$4.17 each at 1K+ pcsrail
of
45
LM2587S-3.3/NOPB

RoHS



TO-263		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide65
FUTUREWorldwide90
$4.17 each at 1K+ pcsrail
of
45
LM2587S-5.0/NOPB
LM2587S-5.0

RoHS



TO-263		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide36
AVNET-EMWorldwide60
DIGIKEYWorldwide64
FARNELLEurope and Asia138
$4.17 each at 1K+ pcsrail
of
45
LM2587S-ADJ/NOPB
LM2587S-ADJ

RoHS



TO-263		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide580
DIGIKEYWorldwide220
FARNELLEurope and Asia393
FUTUREWorldwide1100
NEWARKAmericas34
RS COMPONENTSWorldwide23
TAYLORAmericas89
$4.17 each at 1K+ pcsrail
of
45
LM2587SX-12/NOPB

RoHS



TO-263		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$4.17 each at 1K+ pcsreel
of
500
LM2587SX-3.3

RoHS



TO-263		Full production
Lead Time: 16 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$4.17 each at 1K+ pcsreel
of
500
LM2587SX-5.0/NOPB
LM2587SX-5.0

RoHS



TO-263		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
FUTUREWorldwide441
$4.17 each at 1K+ pcsreel
of
500
LM2587SX-ADJ/NOPB
LM2587SX-ADJ

RoHS



TO-263		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
ARROWWorldwide1000
DIGIKEYWorldwide0
NEWARKAmericas9
$4.17 each at 1K+ pcsreel
of
500

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2587EVAL
SIMPLE SWITCHER? 5A Flyback Regulator Eval BoardFull production


 
DistributorRegionQty
DIGIKEYWorldwide2
NATIONALWorldwide311
$34.40 each1

Features:

  • Requires few external components
  • Family of standard inductors and transformers
  • NPN output switches 5.0 A, can stand off 65 V
  • Wide input voltage range: 4 V to 40 V
  • Current-mode operation for imporved 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

Contents:

  • A fully assembled LM2587 Flyback evaluation board
    • LM2587S-12 fixed output regulator
    • VIN      8-16V
    • VOUT 12V
    • IOUT  1A
  • LM258x datasheets
  • Product information

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LM2587T-12/NOPB
TO-22051NARoHSDownloadN/A
NSUZXYTTE#
LM2587T
-12 P+
LM2587T-3.3/NOPB
TO-22051NARoHSDownloadN/A
NSUZXYTTE#
LM2587T
-3.3 P+
LM2587T-5.0/NOPB
TO-22051NARoHSDownloadN/A
NSUZXYTTE#
LM2587T
-5.0 P+
LM2587T-ADJ/NOPB
LM2587T-ADJ
TO-22051
1		NA
NA		RoHSDownloadN/A
NSUZXYTTE#
LM2587T
-ADJ P+
LM2587S-12/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LM2587S
-12 P+
LM2587S-3.3/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LM2587S
-3.3 P+
LM2587S-5.0/NOPB
LM2587S-5.0
TO-26353
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LM2587S
-5.0 P+
LM2587S-ADJ/NOPB
LM2587S-ADJ
TO-26353
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LM2587S
-ADJ P+
LM2587SX-12/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LM2587S
-12 P+
LM2587SX-3.3
TO-2635RoHSDownloadN/A
NSUZXYTTE#
LM2587S
-3.3 P+
LM2587SX-5.0/NOPB
LM2587SX-5.0
TO-26353
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LM2587S
-5.0 P+
LM2587SX-ADJ/NOPB
LM2587SX-ADJ
TO-26353
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LM2587S
-ADJ P+

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM2587S-12SLM04404600353250011002356520
LM2587S-3.3SLM04404600353250011002356520
LM2587S-5.0SLM04404600353250011002356520
LM2587S-ADJSLM04404600353250011002356520
LM2587SX-12SLM04404600353250011002356520
LM2587SX-3.3SLM04404600353250011002356520
LM2587SX-5.0SLM04404600353250011002356520
LM2587SX-ADJSLM04404600353250011002356520
LM2587T-12SLM04404600353250011002356520
LM2587T-3.3SLM04404600353250011002356520
LM2587T-5.0SLM04404600353250011002356520
LM2587T-ADJSLM04404600353250011002356520

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


[Information as of 22-Nov-2009]