SLVS749C November   2008  – January 2015 TPS22921 , TPS22922

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Typical Application
  5. 5 Revision History
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1  Absolute Maximum Ratings
    2. 8.2  ESD Ratings
    3. 8.3  Recommended Operating Conditions
    4. 8.4  Thermal Information
    5. 8.5  Electrical Characteristics
    6. 8.6  Switching Characteristics: VIN = 0.9 V
    7. 8.7  Switching Characteristics: VIN = 1 V
    8. 8.8  Switching Characteristics: VIN = 1.1 V
    9. 8.9  Switching Characteristics: VIN = 1.2 V
    10. 8.10 Switching Characteristics: VIN = 1.8 V
    11. 8.11 Switching Characteristics: VIN = 2.5 V
    12. 8.12 Switching Characteristics: VIN = 3 V
    13. 8.13 Switching Characteristics: VIN = 3.6 V
    14. 8.14 Typical Characteristics
      1. 8.14.1 Typical DC Characteristics
      2. 8.14.2 Typical AC Characteristics (TPS22921)
      3. 8.14.3 Typical AC Characteristics (TPS22922)
      4. 8.14.4 Typical AC Characteristics (TPS22922B)
      5. 8.14.5 Typical AC Characteristics (TPS22921 and TPS22922)
      6. 8.14.6 Typical AC Characteristics (TPS22921)
      7. 8.14.7 Typical AC Characteristics (TPS22922)
      8. 8.14.8 Typical AC Characteristics (TPS22922B)
  9. 9 Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 ON/OFF Control
      2. 10.3.2 Quick Output Discharge
    4. 10.4 Device Functional Modes
  11. 11Application and Implementation
    1. 11.1 Application Information
      1. 11.1.1 Input Capacitor (Optional)
      2. 11.1.2 Output Capacitor (Optional)
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
        1. 11.2.2.1 Managing Inrush Current
        2. 11.2.2.2 VIN to VOUT Voltage Drop
      3. 11.2.3 Application Curve
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  14. 14Device and Documentation Support
    1. 14.1 Related Links
    2. 14.2 Trademarks
    3. 14.3 Electrostatic Discharge Caution
    4. 14.4 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

6 Device Comparison Table

RON AT 1.8 V
(TYP)		 RISE TIME
(TYP at 1.8 V)		 QUICK OUTPUT
DISCHARGE(1)		 MAX OUTPUT
CURRENT		 ENABLE
TPS22921 33 mΩ 30 μs No 2 A Active high
TPS22922 33 mΩ 30 μs Yes 2 A Active high
TPS22922B 33 mΩ 200 μs Yes 2 A Active high
(1) This feature discharges the output of the switch to ground through a 120-Ω resistor, preventing the output from floating.
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