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

TPS3808
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
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
  • TPS3840  -  Offers more fixed voltage threshold options, a wide 10-V input voltage, low IQ (350 nA) and 1% threshold accuracy

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

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)
TPS3808 Order now Adjustable
0.84
1.12
1.16
1.4
1.67
1.77
2.33
2.79
3.07
4.65    
1     6.5     1.8     Active-low
Open-drain    
Programmable     Active-low enable
Manual reset    
Catalog     -40 to 125     None    
LM8365 Order now 2.7
4.5    
1     6     1     Active-low
Open-drain    
Programmable       Catalog     -40 to 85     None    
TPS3808-Q1 Order now Adjustable
1.12
1.16
1.4
1.67
2.79
3.07
4.65    
1     6.5     1.8     Active-low
Open-drain    
Programmable     Active-low enable
Manual reset    
Automotive     -40 to 125     None    
TPS3840 Order now Trimmable
1.8
2
2.2
2.5
2.7
2.8
2.9
3
4.3
4.5    
1     10     1.5     Active-high
Active-low
Open-drain
Push-pull    
Programmable     Manual reset     Catalog     -40 to 125     None    
TPS3890 Order now Adjustable
1.15
1.44
1.73
2.4
2.89
3.17    
1     5.5     1.5     Active-low
Open-drain    
Programmable     Active-low enable
Manual reset    
Catalog     -40 to 125     None    
TPS3890-Q1 Order now Adjustable
1.15
1.44
1.73
2.4
2.89
2.93
3.066
3.17
4.4
4.65
4.8    
1     5.5     1.5     Active-low
Open-drain    
Programmable     Active-low enable
Manual reset    
Automotive     -40 to 125     None    
TPS3895 Order now Adjustable     1     6.5     1.7     Active-low
Push-pull    
Programmable     Active-high enable
Manual reset    
Catalog     -40 to 125     None    
TPS3896 Order now Adjustable     1     6.5     1.7     Active-high
Push-pull    
Programmable     Active-low enable
Manual reset    
Catalog     -40 to 125     None    
TPS3897 Order now Adjustable     1     6.5     1.7     Active-low