SNVS056J May   2000  – June 2015 LP3961 , LP3964

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configurations 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
    6. 6.6 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 Short-Circuit Protection
      2. 7.3.2 ERROR Flag Operation
      3. 7.3.3 SENSE Pin
      4. 7.3.4 Dropout Voltage
      5. 7.3.5 Reverse Current Path
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation With VOUT(TARGET) + 0.35 V ≤ VIN ≤ 7 V
      2. 7.4.2 Operation With Shutdown (SD) Pin Control
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 External Capacitors
          1. 8.2.2.1.1 Input Capacitor
          2. 8.2.2.1.2 Output Capacitor
        2. 8.2.2.2 Selecting a Capacitor
        3. 8.2.2.3 Capacitor Characteristics
          1. 8.2.2.3.1 Ceramic
          2. 8.2.2.3.2 Tantalum
          3. 8.2.2.3.3 Aluminum
        4. 8.2.2.4 RFI and EMI Susceptibility
        5. 8.2.2.5 Output Adjustment
        6. 8.2.2.6 Turnon Characteristics for Output Voltages Programmed to 2.0 V or Below
        7. 8.2.2.7 Output Noise
        8. 8.2.2.8 Shutdown Operation
        9. 8.2.2.9 Maximum Output Current Capability
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Heatsinking TO-220 Packages
  11. 11Device and Documentation Support
    1. 11.1 Related Links
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

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9 Power Supply Recommendations

The LP396x devices are designed to operate from an input voltage supply range between 2.5 V and 7 V. The input voltage range provides adequate headroom in order for the device to have a regulated output. This input supply must be well regulated. An input capacitor of at least 68 μF is required.