SNOSCY7 June   2014 LP2996A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1. 5.1 Pin Descriptions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Performance Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
  8. 8 Applications and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Input Capacitor
      2. 8.1.2 Output Capacitor
      3. 8.1.3 Thermal Dissipation
    2. 8.2 Typical Application
      1. 8.2.1 Typical Application Circuit
      2. 8.2.2 DDR-III Applications
      3. 8.2.3 DDR-II Applications
      4. 8.2.4 SSTL-2 Applications
      5. 8.2.5 Level Shifting
        1. 8.2.5.1 Output Capacitor Selection
      6. 8.2.6 HSTL Applications
      7. 8.2.7 QDR Applications
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
  11. 11Device and Documentation Support
    1. 11.1 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 Glossary
    4. 10.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
  13. 11Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

9 Power Supply Recommendations

There are several recommendations for the LP2996A input power supply. An input capacitor is not required but is recommended for improved performance during large load transients to prevent the input rail from dropping. The input capacitor should be located as close as possible to the PVIN pin. Several recommendations exist dependent on the application required. A typical value recommended for AL electrolytic capacitors is 50 µF. Ceramic capacitors can also be used, a value in the range of 10 µF with X5R or better would be an ideal choice. The input capacitance can be reduced if the LP2996A is placed close to the bulk capacitance from the output of the 2.5 V DC-DC converter. If the two supply rails (AVIN and PVIN) are separated then the 47 uF capacitor should be placed as close to possible to the PVIN rail. An additional 0.1 uF ceramic capacitor can be placed on the AVIN rail to prevent excessive noise from coupling into the device.