TPS3852 High-Accuracy Voltage Supervisor With Programmable Window Watchdog Timer | TI.com

TPS3852
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
High-Accuracy Voltage Supervisor With Programmable Window Watchdog Timer

 

Recommended alternative parts

  • TPS3852-Q1  -  AEC-Q100 qualified version of this device for automotive applications
  • TPS3430  -  A standalone window watchdog timer to sense both early and late faults
  • TPS3813  -  Fixed reset time delay in a smaller SOT-23 package

Description

The TPS3852 is a precision voltage supervisor with an integrated window watchdog timer. The TPS3852 includes a precision undervoltage supervisor with an undervoltage threshold (VITN) that achieves 0.8% accuracy over the specified temperature range of –40°C to +125°C. In addition, the TPS3852 includes accurate hysteresis making the device ideal for use with tight tolerance systems. The supervisor RESET delay features a 15% accuracy, high-precision delay timer.

The TPS3852 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 watchdog timeouts can be programmed either by an external capacitor, or by factory-programmed default delay settings. The watchdog can be disabled to avoid undesired watchdog timeouts during the development process.

The TPS3852 is available in a small 3.00-mm × 3.00-mm, 8-pin VSON package.

Features

  • VDD Input Voltage Range: 1.6 V to 6.5 V
  • 0.8% Voltage Threshold Accuracy
  • Low Supply Current: IDD = 10 µA (typical)
  • User-Programmable Watchdog Timeout
  • Factory Programmed Precision Watchdog and Reset Timers:
    • ±15% Accurate WDT and RST Delays
  • Open-Drain Outputs
  • Manual Reset Input (MR)
  • Precision Undervoltage Monitoring
    • Supports Common Rails from 1.8 V to 5 V
    • 4% and 7% Thresholds Available
    • 0.5% Hysteresis
  • Watchdog Disable Feature
  • Available in a Small 3-mm × 3-mm, 8-Pin VSON Package

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)
TPS3852 Order now 3.07
3.17    
1     6.5     1.6     Active-low
Open-drain    
200     Active-low enable
Manual reset
Watchdog disable
Watchdog timer
Window watchdog
Safety documentation    
Catalog     -40 to 125     Programmable    
TPS3813 Order now 2.25
2.64
2.93
4.55    
1     6     2     Active-low
Open-drain    
25     Watchdog timer     Catalog     -40 to 85     Programmable    
TPS3828 Order now 2.93
4.55    
1     5.5     1.1     Active-low
Open-drain    
200     Active-low enable
Manual reset
Watchdog timer
Safety documentation    
Catalog     -40 to 85     1.6    
TPS3850 Order now Adjustable
1.11
1.15
1.67
1.72
2.79
2.88
3.06
3.16
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    
Catalog     -40 to 125     Programmable    
TPS3851 Order now 1.67
1.73
2.32
2.4
2.79
2.88
3.07
3.17
4.65
4.8    
1     6.5     1.6     Active-low
Open-drain    
200     Active-low enable
Manual reset
Watchdog disable
Watchdog timer
Safety documentation    
Catalog     -40 to 125     Programmable