TPS3850 Precision window supervisor for OV & UV monitoring with window watchdog timer & programmable delay | TI.com

TPS3850 (ACTIVE)

Precision window supervisor for OV & UV monitoring with window watchdog timer & programmable delay

 

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

View more

Parametrics Compare all products in Supervisor & reset ICs

 
Threshold Voltage 1 (Typ) (V)
Number 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 TPS3430 TPS3431 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     1     1    
6.5     6.5     6.5     6.5     6.5    
1.6     1.6     1.8     1.6     1.6    
Active-low
Open-drain    
Active-low
Open-drain    
Active-low
Open-drain    
Active-low
Open-drain    
Active-low
Open-drain    
Programmable     Programmable     200     200     200    
Undervoltage and overvoltage monitor
Watchdog disable
Watchdog timer
Window watchdog    
Watchdog timer
Window watchdog
Watchdog disable    
Watchdog timer
Watchdog disable
Active-low enable    
Active-low enable
Manual reset
Watchdog disable
Watchdog timer    
Active-low enable
Manual reset
Watchdog disable
Watchdog timer
Window watchdog    
Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
Programmable     Programmable     Programmable     Programmable     Programmable