SLUSFG7 April   2025 TPS62A02-Q1 , TPS62A02A-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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
  8. 7 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power Save Mode
      2. 8.3.2 100% Duty Cycle Low Dropout Operation
      3. 8.3.3 Soft Start
      4. 8.3.4 Switch Current Limit and Short-Circuit Protection (HICCUP)
      5. 8.3.5 Undervoltage Lockout
      6. 8.3.6 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Enable and Disable
      2. 8.4.2 Power Good
  10. 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 Setting the Output Voltage
        2. 9.2.2.2 Feed Forward Capacitor CFF
        3. 9.2.2.3 Inductor Selection
        4. 9.2.2.4 Input Capacitor
        5. 9.2.2.5 Output Capacitor
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

9.2.2.1 Setting the Output Voltage

The output voltage of the TPS62A02-Q1 is adjustable. The output voltage can be set from 0.6V to VIN using a resistor divider from VOUT to GND. The voltage at the FB pin is regulated to 600mV. The value of the output voltage is set by the output resistor divider. The values of these resistors can be calculated by Equation 2 or by using the resistor values from Table 9-3. TI recommends to choose resistor values that allow a current of at least 2µA, meaning the value of R2 must not exceed 400kΩ. Lower resistor values have a positive impact on accuracy and robustness.

Equation 2. R 1 = R 2 × V O U T V F B − 1
Table 9-3 Setting the Output Voltage
NOMINAL OUTPUT VOLTAGE VOUT R1 R2 EXACT OUTPUT VOLTAGE
0.75V 10kΩ 40.2kΩ 0.7493V
0.8V 16.9kΩ 51kΩ 0.7988V
1.0V 20kΩ 30kΩ 1.0V
1.1V 39.2kΩ 47kΩ 1.101V
1.2V 68kΩ 68kΩ 1.2V
1.5V 76.8kΩ 51kΩ 1.5V
1.8V 80.6kΩ 40.2kΩ 1.803V
2.5V 47.5kΩ 15kΩ 2.5V
3.3V 88.7kΩ 19.6kΩ 3.315V