SLVSAG7F November   2011  – November 2021 TPS62130 , TPS62130A , TPS62131 , TPS62132 , TPS62133

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings (1)
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Enable / Shutdown (EN)
      2. 8.3.2 Soft Start / Tracking (SS/TR)
      3. 8.3.3 Power Good (PG)
      4. 8.3.4 Pin-Selectable Output Voltage (DEF)
      5. 8.3.5 Frequency Selection (FSW)
      6. 8.3.6 Undervoltage Lockout (UVLO)
      7. 8.3.7 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Pulse Width Modulation (PWM) Operation
      2. 8.4.2 Power Save Mode Operation
      3. 8.4.3 100% Duty-Cycle Operation
      4. 8.4.4 Current Limit And Short Circuit Protection
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Programming The Output Voltage
        2. 9.2.2.2 External Component Selection
          1. 9.2.2.2.1 Inductor Selection
          2. 9.2.2.2.2 Capacitor Selection
            1. 9.2.2.2.2.1 Output Capacitor
            2. 9.2.2.2.2.2 Input Capacitor
            3. 9.2.2.2.2.3 Soft-Start Capacitor
        3. 9.2.2.3 Tracking Function
        4. 9.2.2.4 Output Filter And Loop Stability
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1 LED Power Supply
      2. 9.3.2 Active Output Discharge
      3. 9.3.3 –3.3-V Inverting Power Supply
      4. 9.3.4 Various Output Voltages
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Information
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Support Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

8.3.3 Power Good (PG)

The TPS6213x has a built-in power good (PG) function to indicate whether the output voltage has reached its appropriate level or not. The PG signal can be used for start-up sequencing of multiple rails. The PG pin is an open-drain output that requires a pullup resistor (to any voltage below 7 V). It can sink 2 mA of current and maintain its specified logic low level. With TPS62130, it is high impedance when the device is turned off due to EN, UVLO, or thermal shutdown. The TPS62130A features PG = Low in this case and can be used to actively discharge VOUT (see Figure 9-41). VIN must remain present for the PG pin to stay Low. See the TPS62130A Differences to TPS62130 Application Report for application details. If not used, the PG pin should be connected to GND but may be left floating.

Table 8-1 Power Good Pin Logic Table (TPS62130)
DEVICE STATEPG LOGIC STATUS
HIGH IMPEDANCELOW
Enable (EN = High)VFB ≥ VTH_PG√
VFB ≤ VTH_PG√
Shutdown (EN = Low)√
UVLO0.7 V < VIN < VUVLO√
Thermal ShutdownTJ > TSD√
Power Supply RemovalVIN < 0.7 V√

Table 8-2 Power Good Pin Logic Table (TPS62130A)
DEVICE STATEPG LOGIC STATUS
HIGH IMPEDANCELOW
Enable (EN = High)VFB ≥ VTH_PG√
VFB ≤ VTH_PG√
Shutdown (EN = Low)√
UVLO0.7 V < VIN < VUVLO√
Thermal ShutdownTJ > TSD√
Power Supply RemovalVIN < 0.7 V√