SNVS120G April   2000  – May 2019 LM2585

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      12-V Flyback Regulator Design Example
  4. 4 Revision History
  5. 5 Pin Configurations
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    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 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 T6
          2. 8.2.2.2.0.2 T6
      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
      5. 8.2.5 Application Curve
    3. 8.3 Additional Application Examples
      1. 8.3.1 Test Circuits
  9. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Heat Sink/Thermal Considerations
  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

PARAMETER TEST CONDITIONS TYP MIN MAX UNIT
SYSTEM PARAMETERS Test Circuit of Figure 48(1)
VOUT Output Voltage VIN = 4V to 10V 12.0 11.52/11.40 12.48/12.60 V
ILOAD = 0.2A to 0.8A
ΔVOUT/ Line Regulation VIN = 4V to 10V 20 100/200 mV
ΔVIN ILOAD = 0.2A
ΔVOUT/ Load Regulation VIN = 10V 20 100/200 mV
ΔILOAD ILOAD = 0.2A to 0.8A
η Efficiency VIN = 10V, ILOAD = 0.6A 93%
UNIQUE DEVICE PARAMETERS(2)
VREF Output Reference Measured at Feedback Pin 1.230 1.208/1.205 1.252/1.255 V
Voltage VCOMP = 1.0V
ΔVREF Reference Voltage VIN = 4V to 40V 1.5 mV
Line Regulation
GM Error Amp ICOMP = −30 μA to +30 μA 3.200 1.800 6.000 mmho
Transconductance VCOMP = 1.0V
AVOL Error Amp VCOMP = 0.5V to 1.6V 670 400/200 V/V
Voltage Gain RCOMP = 1.0 MΩ (3)
IB Error Amp VCOMP = 1.0V 125 425/600 nA
Input Bias Current