Enhanced Product Low Quiescent Current, Programmable Delay Supervisory Circuit - TPS3808-EP

TPS3808-EP (ACTIVE)

Enhanced Product Low Quiescent Current, Programmable Delay Supervisory Circuit

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% Typical
  • 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: –55°C to 125°C
  • Small SOT23 Package
  • SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS
    • Controlled Baseline
    • One Assembly/Test Site
    • One Fabrication Site
    • Available in Military (–55°C/125°C) Temperature Range(1)
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability
  • APPLICATIONS
    • DSP or Microcontroller Applications
    • Notebook/Desktop Computers
    • PDAs/Hand-Held Products
    • Portable/Battery Powered Products
    • FPGA/ASIC Applications

(1) Custom temperature ranges available
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DESCRIPTION/ORDERING INFORMATION

The TPS3808xxx family of microprocessor supervisory circuits monitors system voltages from 0.4 V to 5.0 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 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 has a very low typical quiescent current of 2.4 µA, so it is well-suited to battery-powered applications. It is available in a small SOT23 package, and is fully specified over a temperature range of –55°C to +125°C (TJ).

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Parametrics Compare all products in Supervisor and Reset IC

 
# of supplies monitored
Threshold Voltage 1 (typ) (Typ) (V)
VCC (Min) (V)
VCC (Max) (V)
Iq (Typ) (uA)
Output Driver Type / Reset Output
Reset Threshold Accuracy (%)
Time Delay (ms)
Special Features
Watchdog Timer WDI (sec)
Rating
Operating Temperature Range (C)
Pin/Package
TPS3808-EP
1    
Adjustable    
1.8    
6.5    
2.4    
Active-low
Open-drain    
1.25    
Programmable    
Manual Reset    
None    
HiRel Enhanced Product    
-55 to 125    
6SOT-23    
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