TPS3851-Q1 Automotive High-Accuracy Voltage Supervisor With Integrated Watchdog Timer | TI.com

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 & 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)
TPS3851-Q1 TPS3430-Q1 TPS3431-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    
N/A     N/A     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     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    
200     Programmable     200     Programmable     200    
Active Low Enable
Manual Reset
Watchdog Disable
Watchdog Timer    
Watchdog Timer
Window Watchdog
Watchdog Disable
Watchdog Reset Delay    
Watchdog Timer
Watchdog Disable
Watchdog Reset Delay
Enable    
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     Automotive     Automotive    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
Programmable     Programmable     Programmable     Programmable     Programmable