Automotive High-Accuracy Voltage Supervisor With Integrated Watchdog Timer - TPS3851-Q1

TPS3851-Q1 (ACTIVE)

Automotive High-Accuracy Voltage Supervisor With Integrated Watchdog Timer

 

Description

The TPS3851-Q1 device combines a precision voltage supervisor with a programmable watchdog timer. The TPS3851-Q1 comparator achieves a 0.8% accuracy (–40°C to +125°C) for the undervoltage (VITN) threshold. The TPS3851-Q1 also includes accurate hysteresis on the undervoltage threshold making the device ideal for use with tight tolerance systems. The supervisor RESET delay features a 15% accuracy, high-precision delay timing.

The TPS3851-Q1 includes a programmable watchdog timer for a wide variety of applications. The dedicated watchdog output (WDO) enables increased resolution to help determine the nature of fault conditions. The watchdog timeouts can be programmed either by an external capacitor, or by factory-programmed default delay settings. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

The TPS3851-Q1 is available in a small 3.00-mm × 3.00-mm, 8-pin VSON package. The TPS3851-Q1 features wettable flanks that allow for easy optical inspection.

Features

  • AEC-Q100 Qualified with the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • Input Voltage Range: VDD = 1.6 V to 6.5 V
  • 1% Voltage Threshold Accuracy
  • Low Supply Current: IDD = 10 µA (typ)
  • User-Programmable Watchdog Timeout
  • Factory Programmed Precision Watchdog and Reset Timers:
    • ±15% Accurate WDT and RST Delays
  • Open-Drain Outputs
  • Precision Undervoltage Monitoring:
    • Supports Common Rails from 1.8 V to 5.0 V
    • 4% and 7% Undervoltage Thresholds Available
    • 0.5% Hysteresis
  • Watchdog Disable Feature
  • Available in a Small 3-mm × 3-mm, 8-Pin VSON Package

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Parametrics Compare all products in Supervisor and Reset IC

 
Threshold Voltage 1 (Typ) (V)
# of Supplies Monitored
VCC (Max) (V)
VCC (Min) (V)
Output Driver Type / Reset Output
Time Delay (ms)
Features
Rating
Operating Temperature Range (C)
Watchdog Timer WDI (sec)
TPS3851-Q1 TPS3850-Q1 TPS3852-Q1
1.67
1.73
2.32
2.4
2.79
2.88
3.07
3.17
4.65
4.8   
Adjustable
0.84
0.86
1.06
1.12
1.15
1.67
1.73
2.33
2.4
2.79
2.88
3.07
3.17
4.65
4.8   
1.67
1.73
3.07
3.17   
1    1    1   
6.5    6.5    6.5   
1.6    1.6    1.6   
Active-low
Open-drain   
Active-low
Open-drain   
Active-low
Open-drain   
200    Programmable    200   
Active Low Enable
Manual Reset
Watchdog Disable
Watchdog Timer   
Over Voltage Sense
Watchdog Disable
Watchdog Timer
Window Comparator
Window Watchdog   
Active Low Enable
Manual Reset
Watchdog Disable
Watchdog Timer
Window Watchdog   
Automotive    Automotive    Automotive   
-40 to 125    -40 to 125    -40 to 125   
Programmable    Programmable    Programmable   

Other qualified versions of TPS3851-Q1

Version Part Number Definition
Catalog TPS3851 TI's standard catalog product