SLVSB74H February   2012  – June 2018 TLV62130 , TLV62130A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application Schematic
      2.      Efficiency vs Output Current
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    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 Custom Design With WEBENCH® Tools
        2. 9.2.2.2 Programming the Output Voltage
        3. 9.2.2.3 External Component Selection
          1. 9.2.2.3.1 Inductor Selection
          2. 9.2.2.3.2 Capacitor Selection
            1. 9.2.2.3.2.1 Output Capacitor
            2. 9.2.2.3.2.2 Input Capacitor
            3. 9.2.2.3.2.3 Soft Start Capacitor
        4. 9.2.2.4 Tracking Function
        5. 9.2.2.5 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 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 Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
      2. 12.1.2 Development Support
        1. 12.1.2.1 Custom Design With WEBENCH® Tools
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Documentation Support
      1. 12.3.1 Related Documentation
    4. 12.4 Related Links
    5. 12.5 Community Resources
    6. 12.6 Trademarks
    7. 12.7 Electrostatic Discharge Caution
    8. 12.8 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

8.3.3 Power Good (PG)

The TLV62130 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 startup sequencing of multiple rails. The PG pin is an open-drain output that requires a pull-up resistor (to any voltage below 7 V). It can sink 2 mA of current and maintain its specified logic low level. With TLV62130 it is high impedance when the device is turned off due to EN, UVLO or thermal shutdown. TLV62130A features PG=Low in this case and can be used to actively discharge Vout (see Figure 39). VIN must remain present for the PG pin to stay Low. See SLVA644 for application details. If not used, the PG pin should be connected to GND but may be left floating.

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Table 1. Power Good Pin Logic Table (TLV62130)

Device State PG Logic Status
High Impedance Low
Enable (EN=High) VFB ≥ VTH_PG √
VFB ≤ VTH_PG √
Shutdown (EN=Low) √
UVLO 0.7V < VIN < VUVLO √
Thermal Shutdown TJ > TSD √
Power Supply Removal VIN < 0.7V √

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Table 2. Power Good Pin Logic Table (TLV62130A)

Device State PG Logic Status
High Impedance Low
Enable (EN=High) VFB ≥ VTH_PG √
VFB ≤ VTH_PG √
Shutdown (EN=Low) √
UVLO 0.7V < VIN < VUVLO √
Thermal Shutdown TJ > TSD √
Power Supply Removal VIN < 0.7V √

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