SNVS115E April   2000  – June 2019 LM2587

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Typical Applications
  3. 3 Description
    1.     Device Images
      1.      Flyback Regulator
  4. 4 Revision History
  5. 5 Pin Configurations
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESDRatings
    3. 6.3  Recommended Operating Ratings
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics: 3.3 V
    6. 6.6  Electrical Characteristics: 5 V
    7. 6.7  Electrical Characteristics: 12 V
    8. 6.8  Electrical Characteristics: Adjustable
    9. 6.9  Electrical Characteristics: All Output Voltage Versions
    10. 6.10 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Step-Up (Boost) Regulator Operation
  8. 8 Application And Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Typical Boost Regulator Applications
      2. 8.2.2 Typical Flyback Regulator Applications
        1. 8.2.2.1 Transformer Selection (T)
        2. 8.2.2.2 Transformer Footprints
          1. 8.2.2.2.0.1 T4
      3. 8.2.3 Design Requirements
      4. 8.2.4 Detailed Design Procedure
        1. 8.2.4.1 Custom Design With Webench® Tools
        2. 8.2.4.2 Programming Output Voltage (Selecting R1 And R2)
        3. 8.2.4.3 Short Circuit Condition
        4. 8.2.4.4 Flyback Regulator Input Capacitors
        5. 8.2.4.5 Switch Voltage Limits
        6. 8.2.4.6 Output Voltage Limitations
        7. 8.2.4.7 Noisy Input Line Condition)
        8. 8.2.4.8 Stability
    3. 8.3 Additional Application Examples
      1. 8.3.1 Test Circuits
  9. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
    3. 9.3 Heat Sink/Thermal Considerations
      1. 9.3.1 European Magnetic Vendor Contacts
      2. 9.3.2 Coilcraft
      3. 9.3.3 Pulse Engineering
  10. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
      2. 10.1.2 Development Support
        1. 10.1.2.1 Custom Design With Webench® Tools
    2. 10.2 Receiving Notification Of Documentation Updates
    3. 10.3 Community Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.8 Electrical Characteristics: Adjustable

Specifications with standard type face are for TJ = 25°C, and those in bold type face apply over full Operating Temperature Range. Unless otherwise specified, VIN = 5V.
PARAMETER TEST CONDITIONS TYP MIN MAX UNIT
SYSTEM PARAMETERS Test Circuit of Figure 62(3)
VOUT Output Voltage VIN = 4V to 10V
ILOAD = 300 mA to 1.2A		 12.0 11.52/11.40 12.48/12.60 V
ΔVOUT/
ΔVIN 		Line Regulation VIN = 4V to 10V
ILOAD = 300 mA		 20 100/200 mV
ΔVOUT/
ΔILOAD 		Load Regulation VIN = 10V
ILOAD = 300 mA to 1.2A		 20 100/200 mV
η Efficiency VIN = 10V, ILOAD = 1A 90 %
UNIQUE DEVICE PARAMETERS(4)
VREF Output Reference
Voltage		 Measured at Feedback Pin
VCOMP = 1.0V		 1.230 1.208/1.205 1.252/1.255 V
ΔVREF Reference Voltage
Line Regulation		 VIN = 4V to 40V 1.5 mV
GM Error Amp
Transconductance		 ICOMP = −30 μA to +30 μA
VCOMP = 1.0V		 3.200 1.800 6.000 mmho
AVOL Error Amp
Voltage Gain		 VCOMP = 0.5V to 1.6V
RCOMP = 1.0 MΩ(5) 		670 400/200 V/V
IB Error Amp
Input Bias Current		 VCOMP = 1.0V 125 425/600 nA