Precision Voltage Supervisor With Window Watchdog Timer - TPS3850

TPS3850 (ACTIVE)

Precision Voltage Supervisor With Window Watchdog Timer

 

Description

The TPS3850 combines a precision voltage supervisor with a programmable window watchdog timer. The TPS3850 window comparator achieves 0.8% accuracy (–40°C to +125°C) for both overvoltage (VIT+(OV)) and undervoltage (VIT–(UV)) thresholds. The TPS3850 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 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 is available in a small 3.00-mm × 3.00-mm, 10-pin VSON package.

Features

  • 0.8% Voltage Threshold Accuracy
  • 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
  • Factory-Programmed Precision Watchdog and Reset Timers:
    • ±15% Accurate WDT and RST Delays
  • Watchdog Disable Feature
  • User-Programmable Watchdog Timeout
  • User-Programmable Reset Delay
  • Input Voltage Range: VDD = 1.6 V to 6.5 V
  • Low Supply Current: IDD = 10 µA (typ)
  • Open-Drain Outputs
  • Available in a Small 3-mm × 3-mm, 10-Pin VSON Package
  • Junction Operating Temperature Range:
    –40°C to +125°C

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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)
TPS3850 TPS3851 TPS3852
Adjustable
1.11
1.15
1.67
1.72
2.79
2.88
3.06
3.16
4.65
4.8   
1.67
1.73
2.32
2.4
2.79
2.88
3.07
3.17
4.65
4.8   
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   
Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125   
Programmable    Programmable    Programmable   

Other qualified versions of TPS3850

Version Part Number Definition
Automotive TPS3850-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects