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

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9 Power Supply Recommendations

The LP2952 and LP2953 is designed to operate from an input voltage supply range between 2.3 V and 30 V. The input voltage range provides adequate headroom in order for the device to have a regulated output, normally VIN should be 1 V higher than output voltage to provide a sufficient headroom. This input supply must be well regulated. If the input supply is noisy, additional input capacitors with low ESR can help improve the output noise performance.

Maximum VIN should never be higher than 30 V. Input voltage beyond 30 V may trigger EOS and cause permanent damage to the device.