TPS3850-Q1 Automotive, window supervisor for OV & UV monitoring with window watchdog timer & programmable delay | TI.com

TPS3850-Q1
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Automotive, window supervisor for OV & UV monitoring with window watchdog timer & programmable delay

Automotive, window supervisor for OV & UV monitoring with window watchdog timer & programmable delay - TPS3850-Q1
Datasheet
TPS3850-Q1 Precision Voltage Supervisor with Programmable Window Watchdog Timer datasheet (Rev. A)
 

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

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Part number Order 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-Q1 Order now 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     6.5     1.6     Active-low
Open-drain    		 Programmable     Undervoltage and overvoltage monitor
Watchdog disable
Watchdog timer
Window watchdog
Safety documentation    		 Automotive     -40 to 125     Programmable    
TPS3700-Q1 Order now Adjustable     1
2    		 18     1.8     Active-low
Open-drain    		 0     Undervoltage and overvoltage monitor
Wide input voltage
Dual output
Safety documentation    		 Automotive     -40 to 125     None    
TPS3702-Q1 Order now 0.91
1.09
1.64
1.69
3
3.1
4.55    		 1     18     2     Active-low
Open-drain    		 0     Undervoltage and overvoltage monitor
Wide input voltage
Dual output
Safety documentation    		 Automotive     -40 to 125     None    
TPS3710-Q1 Order now Adjustable     1     18     1.8     Active-low
Open-drain    		 0     Wide input voltage     Automotive     -40 to 125     None