Automotive Precision Voltage Supervisor With Programmable Window Watchdog Timer - TPS3850-Q1

TPS3850-Q1 (ACTIVE)

Automotive Precision Voltage Supervisor With Programmable Window Watchdog Timer

 

Description

The TPS3850-Q1 combines a precision voltage supervisor with a programmable window watchdog timer. The TPS3850-Q1 window comparator achieves 0.8% accuracy (–40°C to +125°C) for both overvoltage (VIT+(OV)) and undervoltage (VIT–(UV)) thresholds. The TPS3850-Q1 also includes accurate hysteresis on both thresholds, making the device ideal for use with tight tolerance systems. The supervisor RESET delay can be set by factory-programmed default delay settings, or programmed by an external capacitor. The factory-programmed RESET delay features a 15% accuracy, high-precision delay timing.

The TPS3850-Q1 includes a programmable window 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 window watchdog timeouts can be set by factory-programmed default delay settings, or programmed by an external capacitor. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

The TPS3850-Q1 is available in a small 3.00-mm ×
3.00-mm, 10-pin VSON package. The TPS3850-Q1 features wettable flanks 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
  • 0.8% Voltage Threshold Accuracy (Max)
  • Low Supply Current: IDD = 10 µA (typ)
  • User-Programmable Watchdog Timeout
  • User-Programmable Reset Delay
  • Factory Programmed Precision Watchdog and Reset Timers:
    • ±15% Accurate WDT and RST Delays
  • Open-Drain Outputs
  • Precision Over- and Undervoltage Monitoring:
    • Supports Common Rails from 0.9 V to 5.0 V
    • 4% and 7% Fault Windows Available
    • 0.5% Hysteresis
  • Watchdog Disable Feature
  • Available in a Small 3-mm × 3-mm, 10-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)
Special Features
Rating
Operating Temperature Range (C)
Watchdog Timer WDI (sec)
TPS3850-Q1 TPS3851-Q1 TPS3852-Q1
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
2.32
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   
Programmable    200    200   
Over Voltage Sense
Watchdog Disable
Watchdog Timer
Window Comparator
Window Watchdog   
Active Low Enable
Manual Reset
Watchdog Disable
Watchdog Timer   
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 TPS3850-Q1

Version Part Number Definition
Catalog TPS3850 TI's standard catalog product