SBVS463A October   2025  – December 2025 TPS7E81-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagrams
    3. 6.3 Feature Description
      1. 6.3.1 Enable (EN)
      2. 6.3.2 Dropout Voltage (VDO)
      3. 6.3.3 Undervoltage Lockout
      4. 6.3.4 Thermal Shutdown
      5. 6.3.5 Foldback Current Limit
      6. 6.3.6 Power Limit
      7. 6.3.7 Output Pulldown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Device Functional Mode Comparison
      2. 6.4.2 Normal Operation
      3. 6.4.3 Dropout Operation
      4. 6.4.4 Disabled
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Adjustable Device Feedback Resistor Selection
      2. 7.1.2 Recommended Capacitor Types
      3. 7.1.3 Input and Output Capacitor Selection
      4. 7.1.4 Reverse Current
      5. 7.1.5 Feed-Forward Capacitor
      6. 7.1.6 Dropout Voltage
      7. 7.1.7 Estimating Junction Temperature
      8. 7.1.8 Power Dissipation (PD)
      9. 7.1.9 Power Dissipation Versus Ambient Temperature
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Choose Feedback Resistors
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 Evaluation Module
        2. 8.1.1.2 Spice Models
      2. 8.1.2 Device Nomenclature
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

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7.2.3 Application Curves

at operating junction temperature TJ = 25°C, VIN = 3.0V or VIN = VOUT(nom) + 0.5V (whichever is greater), VEN = 2.0V, CIN = 1µF, COUT = 2.2µF, and IOUT = 1mA (unless otherwise noted).

TPS7E81-Q1 Inrush Current vs COUT
VIN = 4.3V, VOUT = 3.3V, IOUT = 0mA
Figure 7-7 Inrush Current vs COUT
TPS7E81-Q1 Start-up with EN & VIN tied together
VIN = 4.3V, VOUT = 3.3V, IOUT = 10mA
Figure 7-9 Start-up with EN & VIN tied together
TPS7E81-Q1 Line Transient (4.3V to 12V)
VIN = 4.3V to 12V, VOUT = 3.3V, IOUT = 1mA, dVIN/dt = 2V/µs
Figure 7-11 Line Transient (4.3V to 12V)
TPS7E81-Q1 Load Transient (0mA to 150mA)
VIN = 4.3V, VOUT = 3.3V, IOUT = 0mA to 150mA, dIOUT/dt = 2A/µs
Figure 7-13 Load Transient (0mA to 150mA)
TPS7E81-Q1 Dropout Recovery (12V to 3V)
VIN = 12V to 3V, VOUT = 3.3V, IOUT = 1mA, dVIN/dt = 2V/µs
Figure 7-15 Dropout Recovery (12V to 3V)
TPS7E81-Q1 Brown-out Recovery (40V to 2V)
VIN = 40V to 2V, VOUT = 3.3V, IOUT = 1mA
Figure 7-17 Brown-out Recovery (40V to 2V)
TPS7E81-Q1 Start-up with EN & VIN tied together
VIN = 4.3V, VOUT = 3.3V, IOUT = 1mA
Figure 7-8 Start-up with EN & VIN tied together
TPS7E81-Q1 Start-up with EN & VIN tied together
VIN = 4.3V, VOUT = 3.3V, IOUT = 50mA
Figure 7-10 Start-up with EN & VIN tied together
TPS7E81-Q1 Line Transient (4.3V to 12V)
VIN = 4.3V to 12V, VOUT = 3.3V, IOUT = 150mA, dVIN/dt = 2V/µs
Figure 7-12 Line Transient (4.3V to 12V)
TPS7E81-Q1 Load Transient (1mA to 150mA)
VIN = 4.3V, VOUT = 3.3V, IOUT = 1mA to 150mA, dIOUT/dt = 2A/µs
Figure 7-14 Load Transient (1mA to 150mA)
TPS7E81-Q1 Dropout Recovery (12V to 3V)
VIN = 12V to 3V, VOUT = 3.3V, IOUT = 100mA, dVIN/dt = 2V/µs
Figure 7-16 Dropout Recovery (12V to 3V)
TPS7E81-Q1 Brown-out Recovery (40V to 2V)
VIN = 40V to 2V, VOUT = 3.3V, IOUT = 50mA
Figure 7-18 Brown-out Recovery (40V to 2V)