SLVSD94F November   2017  – November 2024 TPS62088 , TPS62088A , TPS62089A

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Options
  6. 5 Pin Configuration and Functions
  7. 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
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Power Save Mode
      2. 7.3.2 Pulse Width Modulation (PWM) Operation
      3. 7.3.3 100% Duty Cycle Low Dropout Operation
      4. 7.3.4 Soft Start
      5. 7.3.5 Switch Current Limit and HICCUP Short-Circuit Protection
      6. 7.3.6 Undervoltage Lockout
      7. 7.3.7 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable and Disable
      2. 7.4.2 Power Good
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Setting The Output Voltage
        3. 8.2.2.3 Feedforward Capacitor
        4. 8.2.2.4 Output Filter Design
        5. 8.2.2.5 Inductor Selection
        6. 8.2.2.6 Capacitor Selection
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
        1. 8.4.2.1 Thermal Considerations
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Development Support
        1. 9.1.2.1 Custom Design With WEBENCH® Tools
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.4.2 Power Good

The device has a power-good output. The PG pin goes high impedance after the FB pin voltage is above 96% and less than 105% of the nominal voltage, and is driven low after the voltage falls below typically 92% or higher than 110% of the nominal voltage. The PG pin is an open-drain output and is specified to sink up to 1 mA. The power-good output requires a pullup resistor connecting to any voltage rail less than 5.5 V.

The PG signal can be used for sequencing of multiple rails by connecting the PG signal to the EN pin of other converters. Leave the PG pin unconnected when not used. The PG rising edge has a 100-µs blanking time and the PG falling edge has a deglitch delay of 20 µs.

Table 7-1 PG Pin Logic
DEVICE CONDITIONSLOGIC STATUS
HIGH IMPEDANCELOW
EnableEN = HIGH, VFB ≥ 0.576 V√
EN = HIGH, VFB ≤ 0.552 V√
EN = HIGH, VFB ≤ 0.63 V√
EN = HIGH, VFB ≥ 0.66 V√
ShutdownEN = LOW√
Thermal shutdownTJ > TJSD√
UVLO0.7 V < VIN < VUVLO√
Power supply removalVIN < 0.7 Vundefined