SBVS121E August   2010  – May 2015 TPS7A49

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
    6. 6.6 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Internal Current Limit
      2. 8.3.2 Programmable Soft-Start
      3. 8.3.3 Enable Pin Operation
      4. 8.3.4 Thermal Protection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Normal Operation
      2. 8.4.2 Dropout Operation
      3. 8.4.3 Disabled
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1  Adjustable Operation
      2. 9.1.2  Capacitor Recommendations
      3. 9.1.3  Input and Output Capacitor Requirements
      4. 9.1.4  Noise-Reduction and Feed-Forward Capacitor Requirements
      5. 9.1.5  Maximum AC Performance
      6. 9.1.6  Output Noise
      7. 9.1.7  Post DC-DC Converter Filtering
      8. 9.1.8  Power-Supply Rejection
      9. 9.1.9  Transient Response
      10. 9.1.10 Audio Applications
      11. 9.1.11 Power for Precision Analog
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
    3. 9.3 Do's and Don’ts
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Board Layout Recommendations to Improve PSRR and Noise Performance
      2. 11.1.2 Power Dissipation
    2. 11.2 Layout Example
    3. 11.3 Package Mounting
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
        1. 12.1.1.1 Evaluation Modules
        2. 12.1.1.2 Spice Models
      2. 12.1.2 Device Nomenclature
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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10 Power Supply Recommendations

The input supply for the LDO must be within its recommended operating conditions (that is, between 3 V to 35 V). The input voltage must provide adequate headroom in order for the device to have a regulated output. If the input supply is noisy, additional input capacitors with low ESR can help improve the output noise performance.

The input and output supplies must also be bypassed with at least a 2.2-µF capacitor located near the input and output pins. No other components must be located between these capacitors and the pins.