SNVS095F May   2004  – March 2015 LP2952-N , LP2953

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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: 3.3-V Versions
    6. 6.6 Electrical Characteristics: 5-V Versions
    7. 6.7 Electrical Characteristics: All Voltage Options
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Fixed Voltage Options and Programmable Voltage Version
      2. 7.3.2 High-Accuracy Output Voltage
      3. 7.3.3 Error Detection Comparator Output
      4. 7.3.4 Auxiliary Comparator
      5. 7.3.5 Short-Circuit Protection (Current Limit)
      6. 7.3.6 Thermal Protection
      7. 7.3.7 Automatic Output Discharge
    4. 7.4 Device Functional Mode
      1. 7.4.1 Shutdown Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 External Capacitors
      2. 8.1.2 Minimum Load
      3. 8.1.3 Programming the Output Voltage
      4. 8.1.4 Dropout Voltage
      5. 8.1.5 Dropout Detection Comparator
      6. 8.1.6 Output Isolation
      7. 8.1.7 Reducing Output Noise
      8. 8.1.8 Auxiliary Comparator (LP2953 Only)
      9. 8.1.9 SHUTDOWN Input
    2. 8.2 Typical Applications
      1. 8.2.1 Basic 5-V Regulator
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 5-V Current Limiter with Load Fault Indicator
      3. 8.2.3 Low Temperature Coefficient Current Sink
      4. 8.2.4 5-V Regulator With Error Flags for Low Battery and Out of Regulation
      5. 8.2.5 5-V Battery Powered Supply With Backup and Low Battery Flag
      6. 8.2.6 5-V Regulator With Timed Power-On Reset
      7. 8.2.7 5-V Regulator With Snap-ON and Snap-OFF Features and Hysteresis
      8. 8.2.8 5-V Regulator With Error Flags for Low Battery and Out of Regulation With Snap-ON or Snap-OFF Output
      9. 8.2.9 5-V Regulator With Timed Power-On Reset, Snap-ON and Snap-OFF Features, and Hysteresis
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Power Dissipation: Heatsink Requirements (Industrial Temperature Range Devices)
  11. 11Device and Documentation Support
    1. 11.1 Related Links
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

4 Revision History

Changes from E Revision (December 2014) to F Revision

  • Deleted "Assured" Go
  • Changed "Output Pulldown Crowbar" to "Automatic Output Discharge" Go
  • Changed "internal crowbar" to "automatic output discharge"Go
  • Added word "input" after "battery" in Features and DescriptionGo
  • Changed pin names for IN and OUT to match TI nomenclature; fix typosGo
  • Changed max junc. temp from 125°C to 150°C Go
  • Changed wording of footnote 12 Go
  • Added second bullet for "LP2953 versions only" Go
  • Added Automatic Output Dischange subsection Go
  • Deleted sentence "To achieve the smallest form factor, the TO-92 package is selected."Go
  • Changed "With an efficiency of 83.3% and a 250-mA maximum load, the internal power dissipation is 250 mW, which corresponds to a 19.2°C junction temperature rise for the SOIC package." to "With a VIN – VOUT differential of 1 V and a maximum load current of 250 mA the internal junction temperature (TJ) of the SOIC package will rise 19.2° above the ambient temperature."Go
  • Deleted "Thermal Resistance for Various Copper Heatsinking Patterns" tableGo

Changes from D Revision (September 2013) to E Revision

  • Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section; updated Thermal Information values; deleted obsolete LP2953AM references Go

Changes from C Revision (March 2005) to D Revision

  • Changed layout of National Data Sheet to TI formatGo