SLVSDU9D February   2017  – June 2025 TPS7B63-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 Switching Characteristics
    7. 5.7 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 Device Enable (EN)
      2. 6.3.2 Adjustable Power-Good Threshold (PG, PGADJ)
      3. 6.3.3 Adjustable Power-Good Delay Timer (DELAY)
      4. 6.3.4 Undervoltage Shutdown
      5. 6.3.5 Current Limit
      6. 6.3.6 Thermal Shutdown
      7. 6.3.7 Integrated Watchdog
        1. 6.3.7.1 Window Watchdog (WTS, ROSC, FSEL and WRS)
        2. 6.3.7.2 Standard Watchdog (WTS, ROSC and FSEL)
        3. 6.3.7.3 Watchdog Service Signal and Watchdog Fault Outputs (WD and WDO)
        4. 6.3.7.4 ROSC Status Detection (ROSC)
        5. 6.3.7.5 Watchdog Enable (PG and WD_EN)
        6. 6.3.7.6 Watchdog Initialization
        7. 6.3.7.7 Window Watchdog Operation (WTS = Low)
        8. 6.3.7.8 Standard Watchdog Operation (WTS = High)
    4. 6.4 Device Functional Modes
      1. 6.4.1 Operation With Input Voltage Lower Than 4 V
      2. 6.4.2 Operation With Input Voltage Higher Than 4 V
  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 Input Capacitor
        2. 7.2.2.2 Output Capacitor
        3. 7.2.2.3 Power-Good Threshold
        4. 7.2.2.4 Power-Good Delay Period
        5. 7.2.2.5 Watchdog Setup
      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 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

3 Description

In automotive microcontroller or microprocessor power-supply applications, the watchdog is used to monitor the microcontroller working status to prevent software runaway. The watchdog must be independent of the microcontroller in a reliable system.

The TPS7B63-Q1 is a 300mA watchdog low-dropout regulator (LDO) designed for an operating voltage up to 40V, with typical quiescent current of only 19µA at light load. The device integrates a programmable function for selecting a window watchdog or standard watchdog, with an external resistor to set the watchdog time within 10% accuracy.

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2)
TPS7B63-Q1 PWP (HTSSOP, 16) 5mm × 6.4mm
(1) For more information, see the Mechanical, Packaging, and Orderable Information.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
Device Information
PART NUMBER OUTPUT VOLTAGE PACKAGE
TPS7B6333-Q1 Fixed 3.3V HTSSOP (16)
TPS7B6350-Q1 Fixed 5V
TPS7B63-Q1 Typical Application Schematic Typical Application Schematic

The PG pin on the TPS7B63-Q1 indicates when the output voltage is stable and in regulation. The power-good delay period and power-good threshold can be adjusted by selecting external components. The device also features integrated short-circuit and overcurrent protection. The combination of such features makes this device particularly flexible and designed to supply a microcontroller in automotive applications.