SLVSBC6C March   2013  – December 2019 TPS84A20

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Application
  4. 4 Revision History
  5. 5 Ordering Information
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Recommended Operating Conditions
    3. 6.3 Package Specifications
    4. 6.4 Electrical Characteristics
    5. 6.5 Thermal Information
  7. 7 Device Information
    1. 7.1      Functional Block Diagram
    2. Table 1. Pin Descriptions
  8. 8 Typical Characteristics (PVIN = VIN = 12 V)
  9. 9 Typical Characteristics (PVIN = VIN = 5 V)
  10. 10Typical Characteristics (PVIN = 3.3 V, VIN = 5 V)
  11. 11Application Information
    1. 11.1  Adjusting the Output Voltage
    2. 11.2  Capacitor Recommendations for the TPS84A20 Power Supply
      1. 11.2.1 Capacitor Technologies
        1. 11.2.1.1 Electrolytic, Polymer-Electrolytic Capacitors
        2. 11.2.1.2 Ceramic Capacitors
        3. 11.2.1.3 Tantalum, Polymer-Tantalum Capacitors
      2. 11.2.2 Input Capacitor
      3. 11.2.3 Output Capacitor
    3. 11.3  Transient Response
    4. 11.4  Transient Waveforms
    5. 11.5  Application Schematics
    6. 11.6  VIN and PVIN Input Voltage
    7. 11.7  3.3 V PVIN Operation
    8. 11.8  Power Good (PWRGD)
    9. 11.9  Light Load Efficiency (LLE)
    10. 11.10 SYNC_OUT
    11. 11.11 Parallel Operation
    12. 11.12 Power-Up Characteristics
    13. 11.13 Pre-Biased Start-Up
    14. 11.14 Remote Sense
    15. 11.15 Thermal Shutdown
    16. 11.16 Output On/Off Inhibit (INH)
    17. 11.17 Slow Start (SS/TR)
    18. 11.18 Overcurrent Protection
    19. 11.19 Synchronization (CLK)
    20. 11.20 Sequencing (SS/TR)
    21. 11.21 Programmable Undervoltage Lockout (UVLO)
    22. 11.22 Layout Considerations
    23. 11.23 EMI
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
    1. 13.1 Tape and Reel Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RVQ|42
Thermal pad, mechanical data (Package|Pins)
Orderable Information

11.9 Light Load Efficiency (LLE)

The TPS84A20 operates in pulse skip mode at light load currents to improve efficiency and decrease power dissipation by reducing switching and gate drive losses.

These pulses can cause the output voltage to rise when there is no load to discharge the energy. For output voltages < 1.5 V, a minimum load is required. The amount of required load can be determined by Equation 2. In most cases, the minimum current drawn by the load circuit will be enough to satisfy this load. Applications requiring a load resistor to meet the minimum load, the added power dissipation will be ≤ 3.6 mW. A single 0402 size resistor across VOUT and PGND can be used.

Equation 2. TPS84A20 Min Load Equation plus.png

When VOUT = 0.6 V and RSET = OPEN, the minimum load current is 600 µA.