SNVS104F June   1999  – May 2020 LM2574 , LM2574HV

PRODUCTION DATA.  

1. 1 Features
2. 2 Applications
3. 3 Description
   1.     Device Images
      1.      Typical Application (Fixed Output Voltage Versions)
4. 4 Revision History
5. 5 Pin Configuration and Functions
   1.     Pin Functions
6. 6 Specifications
   1. 6.1  Absolute Maximum Ratings
   2. 6.2  ESD Ratings
   3. 6.3  Recommended Operating Conditions
   4. 6.4  Thermal Information
   5. 6.5  Electrical Characteristics for All Output Voltage Versions
   6. 6.6  Electrical Characteristics – 3.3-V Version
   7. 6.7  Electrical Characteristics – 5-V Version
   8. 6.8  Electrical Characteristics – 12-V Version
   9. 6.9  Electrical Characteristics – 15-V Version
   10. 6.10 Electrical Characteristics – Adjustable Version
   11. 6.11 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 Current Limit
      2. 7.3.2 Undervoltage Lockout
      3. 7.3.3 Delayed Start-up
      4. 7.3.4 Adjustable Output, Low-Ripple Power Supply
   4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Active Mode
8. 8 Application and Implementation
   1. 8.1 Application Information
      1. 8.1.1 Input Capacitor (CIN)
      2. 8.1.2 Inductor Selection
      3. 8.1.3 Inductor Ripple Current
      4. 8.1.4 Output Capacitor
      5. 8.1.5 Catch Diode
      6. 8.1.6 Output Voltage Ripple and Transients
      7. 8.1.7 Feedback Connection
      8. 8.1.8 ON/OFF Input
      9. 8.1.9 Additional Applications
         1. 8.1.9.1 Inverting Regulator
         2. 8.1.9.2 Negative Boost Regulator
   2. 8.2 Typical Applications
      1. 8.2.1 Fixed Output Voltage Applications
         1. 8.2.1.1 Design Requirements
         2. 8.2.1.2 Detailed Design Procedure
            1. 8.2.1.2.1 Custom Design With WEBENCH® Tools
            2. 8.2.1.2.2 Inductor Selection (L1)
            3. 8.2.1.2.3 Output Capacitor Selection (COUT)
            4. 8.2.1.2.4 Catch Diode Selection (D1)
            5. 8.2.1.2.5 Input Capacitor (CIN)
      2. 8.2.2 Application Curves
      3. 8.2.3 Adjustable Output Voltage Applications
         1. 8.2.3.1 Design Requirements
         2. 8.2.3.2 Detailed Design Procedure
            1. 8.2.3.2.1 Programming Output Voltage
            2. 8.2.3.2.2 Inductor Selection (L1)
            3. 8.2.3.2.3 Output Capacitor Selection (COUT)
            4. 8.2.3.2.4 Catch Diode Selection (D1)
            5. 8.2.3.2.5 Input Capacitor (CIN)
         3. 8.2.3.3 Application Curves
9. 9 Power Supply Recommendations
10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Grounding
    4. 10.4 Thermal Considerations
11. 11Device and Documentation Support
    1. 11.1 Device Support
       1. 11.1.1 Third-Party Products Disclaimer
       2. 11.1.2 Custom Design With WEBENCH® Tools
       3. 11.1.3 Device Nomenclature
          1. 11.1.3.1  Buck Regulator
          2. 11.1.3.2  Buck-Boost Regulator
          3. 11.1.3.3  Duty Cycle (D)
          4. 11.1.3.4  Catch Diode or Current Steering Diode
          5. 11.1.3.5  Capacitor Equivalent Series Resistance (ESR)
          6. 11.1.3.6  Equivalent Series Inductance (ESL)
          7. 11.1.3.7  Output Ripple Voltage
          8. 11.1.3.8  Capacitor Ripple Current
          9. 11.1.3.9  Standby Quiescent Current (ISTBY)
          10. 11.1.3.10 Inductor Ripple Current (ΔiIND)
          11. 11.1.3.11 Continuous and Discontinuous Mode Operation
          12. 11.1.3.12 Inductor Saturation
          13. 11.1.3.13 Operating Volt Microsecond Constant (E × Top)
    2. 11.2 Documentation Support
       1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
12. 12Mechanical, Packaging, and Orderable Information