TPS3890 Low-Quiescent-Current 1% Accurate Supervisor With Programmable Delay | TI.com

TPS3890 (ACTIVE)

Low-Quiescent-Current 1% Accurate Supervisor With Programmable Delay

Low-Quiescent-Current 1% Accurate Supervisor With Programmable Delay  - TPS3890
 

Description

The TPS3890 is a precision voltage supervisor with low-quiescent current that monitors system voltages as low as 1.15 V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. The TPS3890 family uses a precision reference to achieve 1% threshold accuracy. The reset delay time can be user-adjusted between 40 µs and 30 s by connecting the CT pin to an external capacitor. The TPS3890 has a very low quiescent current of 2.1 µA and is available in a small 1.5-mm × 1.5-mm package, making the device well-suited for battery-powered and space-constrained applications. The device is fully specified over a temperature range of –40°C to +125°C (TJ).

Features

  • Power-On-Reset (POR) Generator with Adjustable Delay Time: 40 µs to 30 s
  • Very Low Quiescent Current: 2.1 µA (Typical)
  • High Threshold Accuracy: 1% (max)
  • Precision Hysteresis
  • Fixed and Adjustable Threshold Voltages:
    • Fixed Thresholds for Standard Rails:
      1.2 V to 3.3 V
    • Adjustable Down to 1.15 V
  • Manual Reset (MR) Input
  • Open-Drain RESET Output
  • Temperature Range: –40°C to +125°C
  • Package: 1.5-mm × 1.5-mm WSON

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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)
TPS3890 TPS3808 TPS3895 TPS3896 TPS3897 TPS3898
Adjustable
1.15
1.44
1.73
2.4
2.89
3.17    
Adjustable
0.84
1.12
1.16
1.4
1.67
1.77
2.33
2.79
3.07
4.65    
Adjustable     Adjustable     Adjustable     Adjustable    
1     1     1     1     1     1    
5.5     6.5     6.5     6.5     6.5     6.5    
1.5     1.8     1.7     1.7     1.7     1.7    
Active-low
Open-drain    
Active-low
Open-drain    
Active-high
Push-pull    
Active-low
Push-pull    
Active-high
Open-drain    
Active-low
Open-drain    
Programmable     Programmable     Programmable     Programmable     Programmable     Programmable    
Active Low Enable
Manual Reset    
Active Low Enable
Manual Reset    
Active High Enable
Manual Reset    
Active Low Enable
Manual Reset    
Active High Enable
Manual Reset    
Active Low Enable
Manual Reset    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
None     None     None     None     None     None