SBVS439A April   2024  – May 2025 TPS7B91

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 Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Wide Supply Range
      2. 6.3.2 Low Quiescent Current
      3. 6.3.3 Dropout Voltage (VDO)
      4. 6.3.4 Current Limit
      5. 6.3.5 Leakage Null Control Circuit
    4. 6.4 Device Functional Modes
      1. 6.4.1 Normal Operation
      2. 6.4.2 Dropout Operation
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 External Capacitor Requirements
        2. 7.2.2.2 Input and Output Capacitor Requirements
        3. 7.2.2.3 Reverse Current
        4. 7.2.2.4 Power Dissipation (PD)
        5. 7.2.2.5 Estimating Junction Temperature
      3. 7.2.3 Application Curves
    3. 7.3 Best Design Practices
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
        1. 7.5.1.1 Power Dissipation
      2. 7.5.2 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

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5.6 Typical Characteristics

at operating junction temperature TJ = 25°C, VIN = 2.5V or VIN = VOUT(nom) + 0.5V (whichever is greater), CIN = 1µF, COUT = 1µF, and IOUT = 1mA (unless otherwise noted)

TPS7B91 VOUT vs VIN
VOUT = 5.0V, IOUT = 10mA
Figure 5-1 VOUT vs VIN
TPS7B91 VOUT vs VIN
VOUT = 5.0V, IOUT = 150mA
Figure 5-3 VOUT vs VIN
TPS7B91 VOUT vs IOUT
VIN = 7.0V, VOUT = 5.0V
Figure 5-5 VOUT vs IOUT
TPS7B91 VOUT Accuracy vs IOUT
VIN = 5.5V, VOUT = 5.0V
Figure 5-7 VOUT Accuracy vs IOUT
TPS7B91 IGND vs IOUT
VIN = 8.8V, VOUT = 5.0V
Figure 5-9 IGND vs IOUT
TPS7B91 IGND vs VIN
VOUT = 5.0V, IOUT = 50mA
Figure 5-11 IGND vs VIN
TPS7B91 Dropout vs Temperature
VOUT = 5.0V
Figure 5-13 Dropout vs Temperature
TPS7B91 Current Limit vs VOUT
VIN = 9.0V
Figure 5-15 Current Limit vs VOUT
TPS7B91 Short-Current Limit vs VIN
VOUT = 5.0V
Figure 5-17 Short-Current Limit vs VIN
TPS7B91 UVLO Thresholds vs Temperature
 
Figure 5-19 UVLO Thresholds vs Temperature
TPS7B91 VIN Line Transient (7V to 40V)
VOUT = 5.0V, IOUT = 1mA, dVIN/dt = 1V/μs
Figure 5-21 VIN Line Transient (7V to 40V)
TPS7B91 VIN Line Transient (8.8V to 10V)
VOUT = 5.0V, IOUT = 1mA, dVIN/dt = 1V/μs
Figure 5-23 VIN Line Transient (8.8V to 10V)
TPS7B91 Load Transient (1mA to 150mA)
VIN = 7.0V, VOUT = 5.0V, dIOUT/dt = 0.1A/μs
Figure 5-25 Load Transient (1mA to 150mA)
TPS7B91 Brownout Transient (40V to 1.7V)
VOUT = 5.0V, IOUT = 1mA, dVIN/dt = 1V/μs
Figure 5-27 Brownout Transient (40V to 1.7V)
TPS7B91 Start-Up
VIN = 5.5V, VOUT = 5.0V, ROUT = 5kΩ
Figure 5-29 Start-Up
TPS7B91 PSRR vs Load Current
VOUT = 5.0V, COUT = 1μF, VIN = 7V
Figure 5-31 PSRR vs Load Current
TPS7B91 PSRR vs Output Capacitor
VIN = 7.0V, VOUT = 5.0V, IOUT = 50mA
Figure 5-33 PSRR vs Output Capacitor
TPS7B91 Noise vs Input Supply
VOUT = 5.0V, IOUT = 50mA, COUT = 1μF
Figure 5-35 Noise vs Input Supply
TPS7B91 VOUT vs VIN
VOUT = 5.0V, IOUT = 50mA
Figure 5-2 VOUT vs VIN
TPS7B91 VOUT vs IOUT
VIN = 5.5V, VOUT = 5.0V
Figure 5-4 VOUT vs IOUT
TPS7B91 VOUT Accuracy vs VIN
VOUT = 5.0V, IOUT = 1.0mA
Figure 5-6 VOUT Accuracy vs VIN
TPS7B91 VOUT Accuracy vs IOUT
VIN = 7.0V, VOUT = 5.0V
Figure 5-8 VOUT Accuracy vs IOUT
TPS7B91 IGND vs VIN
VOUT = 5.0V, IOUT = 0mA
Figure 5-10 IGND vs VIN
TPS7B91 IGND vs VIN (Dropout Operation)
VOUT = 5.0V, IOUT = 0mA
Figure 5-12 IGND vs VIN (Dropout Operation)
TPS7B91 Dropout vs IOUT
VOUT = 5.0V
Figure 5-14 Dropout vs IOUT
TPS7B91 Current Limit vs VIN
VOUT = 5.0V
Figure 5-16 Current Limit vs VIN
TPS7B91 Start-Up Time vs Temperature
VIN = 5.5V, VOUT = 5.0V
Figure 5-18 Start-Up Time vs Temperature
TPS7B91 VIN Line Transient (7V to 10V)
VOUT = 5.0V, IOUT = 150mA, dVIN/dt = 1V/μs
Figure 5-20 VIN Line Transient (7V to 10V)
TPS7B91 VIN Line Transient (7V to 40V)
VOUT = 5.0V, IOUT = 150mA, dVIN/dt = 1V/μs
Figure 5-22 VIN Line Transient (7V to 40V)
TPS7B91 VIN Line Transient (8.8V to 40V)
VOUT = 5.0V, IOUT = 1mA, dVIN/dt = 1V/μs
Figure 5-24 VIN Line Transient (8.8V to 40V)
TPS7B91 Load Transient (1mA to 150mA)
VIN = 7.0V, VOUT = 5.0V, dIOUT/dt = 1A/μs
Figure 5-26 Load Transient (1mA to 150mA)
TPS7B91 Brownout Transient (40V to 2.1V)
VOUT = 5.0V, IOUT = 1mA, dVIN/dt = 1V/μs
Figure 5-28 Brownout Transient (40V to 2.1V)
TPS7B91 Inrush Current vs Output Capacitor
VIN = 5.5V, VOUT = 5.0V
Figure 5-30 Inrush Current vs Output Capacitor
TPS7B91 PSRR vs Input Supply
VOUT = 5.0V, COUT = 1μF, IOUT = 50mA
Figure 5-32 PSRR vs Input Supply
TPS7B91 Noise vs Load Current
VIN = 7.0V, VOUT = 5.0V, COUT = 1μF
Figure 5-34 Noise vs Load Current
TPS7B91 Noise vs Output Capacitor
VIN = 7.0V, VOUT = 5.0V, IOUT = 50mA
Figure 5-36 Noise vs Output Capacitor