TPS3808 Low-quiescent current supervisor with programmable-delay and manual reset | TI.com

TPS3808 (ACTIVE)

Low-quiescent current supervisor with programmable-delay and manual reset

 

Recommended alternative parts

  • TPS3890  -  Lower Iq at 2.1 µA and offers the same features as the TPS3808

Description

The TPS3808 family of microprocessor supervisory circuits monitors system voltages from 0.4 V to 5 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 TPS3808 device uses a precision reference to achieve 0.5% threshold accuracy for VIT ≤ 3.3 V. The reset delay time can be set to 20 ms by disconnecting the CT pin, 300 ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor. The TPS3808 device has a very low typical quiescent current of 2.4 µA, so it is well-suited to battery-powered applications. It is available in the SOT-23 and 2-mm × 2-mm WSON packages, and is fully specified over a temperature range of –40°C to 125°C (TJ).

Features

  • Power-On Reset Generator with Adjustable Delay
    Time: 1.25 ms to 10 s
  • Very Low Quiescent Current: 2.4 µA Typical
  • High Threshold Accuracy: 0.5% Typ
  • Fixed Threshold Voltages for Standard Voltage
    Rails from 0.9 V to 5 V and Adjustable Voltage
    Down to 0.4 V Are Available
  • Manual Reset (MR) Input
  • Open-Drain RESET Output
  • Temperature Range: –40°C to 125°C
  • Small SOT-23 and 2-mm × 2-mm WSON
    Packages

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)
TPS3808 LM8365 TPS3840 TPS3890 TPS3895 TPS3896 TPS3897 TPS3898
Adjustable
0.84
1.12
1.16
1.4
1.67
1.77
2.33
2.79
3.07
4.65    
2.7
4.5    
Trimmable
2
2.5
2.7
2.8
2.9
3    
Adjustable
1.15
1.44
1.73
2.4
2.89
3.17    
Adjustable     Adjustable     Adjustable     Adjustable    
1     1     1     1     1     1     1     1    
6.5     6     10     5.5     6.5     6.5     6.5     6.5    
1.8     1     1.5     1.5     1.7     1.7     1.7     1.7    
Active-low
Open-drain    
Active-low
Open-drain    
Active-high
Active-low
Open-drain
Push-pull    
Active-low
Open-drain    
Active-low
Push-pull    
Active-high
Push-pull    
Active-low
Open-drain    
Active-high
Open-drain    
Programmable     Programmable     Programmable     Programmable     Programmable     Programmable     Programmable     Programmable    
Active-low enable
Manual reset    
  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     Catalog     Catalog    
-40 to 125     -40 to 85     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
None     None     None     None     None     None     None     None