SBVS360A February   2020  – November 2020 TPS7B85-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Enable (EN)
      2. 7.3.2 Power-Good (PG)
        1. 7.3.2.1 Adjustable Power-Good (PGADJ)
      3. 7.3.3 Adjustable Power-Good Delay Timer (DELAY)
      4. 7.3.4 Sense Comparator
      5. 7.3.5 Undervoltage Lockout
      6. 7.3.6 Thermal Shutdown
      7. 7.3.7 Current Limit
    4. 7.4 Device Functional Modes
      1. 7.4.1 Device Functional Mode Comparison
      2. 7.4.2 Normal Operation
      3. 7.4.3 Dropout Operation
      4. 7.4.4 Disabled
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Input and Output Capacitor Selection
      2. 8.1.2 Dropout Voltage
      3. 8.1.3 Reverse Current
      4. 8.1.4 Power Dissipation (PD)
        1. 8.1.4.1 Thermal Performance Versus Copper Area
      5. 8.1.5 Estimating Junction Temperature
      6. 8.1.6 SI Pin
        1. 8.1.6.1 Calculating the Sense Input (SI) Pin Threshold
        2. 8.1.6.2 Different Uses for the Sense Input Pin
          1. 8.1.6.2.1 Monitoring Input Voltage
          2. 8.1.6.2.2 Creating OV and UV Power-Good
          3. 8.1.6.2.3 Monitoring a Separate Supply Voltage
      7. 8.1.7 Pulling Up the SO and PG Pins to a Different Voltage
      8. 8.1.8 Power-Good
        1. 8.1.8.1 Setting the Adjustable Power-Good Threshold
        2. 8.1.8.2 Setting the Adjustable Power-Good Delay
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Input Capacitor
        2. 8.2.2.2 Output Capacitor
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Package Mounting
      2. 10.1.2 Board Layout Recommendations to Improve PSRR and Noise Performance
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Device Nomenclature
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary

1 Features

  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
    • Junction temperature: –40°C to +150°C, TJ
  • Input voltage range: 3 V to 40 V (42 V max)
  • Output voltage range: 3.3 V and 5 V (fixed)
  • Output current: up to 150 mA
  • Output voltage accuracy: ±0.75% (max)
  • Low dropout voltage:
    • 225 mV (max) at 150 mA (VOUT ≥ 3.3 V)
  • Low quiescent current:
    • 18 µA (typ)
    • 4 µA (max) when disabled
  • Excellent line transient response:
    • ±2% VOUT deviation during cold-crank
    • ±2% VOUT deviation (1-V/µs VIN slew rate)
  • Integrated voltage detection
  • Power-good with adjustable threshold and programmable delay period
  • Stable with a 2.2-µF or larger capacitor
  • Functional Safety-Capable
  • Package: 10-pin VSON with thermal pad
    • Low thermal resistance (RθJA): 50.3°C/W