Dual Voltage Detector - TPS3805H33

TPS3805H33 (ACTIVE)

Dual Voltage Detector

Description

The TPS3803 and TPS3805 families of supervisory circuits provide circuit initialization and timing supervision, primarily for DSPs and processor-based systems.

The TPS3803G15 device has a fixed-sense threshold voltage VIT set by an internal voltage divider, whereas the TPS3803-01 has an adjustable SENSE input that can be configured by two external resistors. In addition to the fixed sense threshold monitored at VDD, the TPS3805 devices provide a second adjustable SENSE input. RESET is asserted in case any of the two voltages drops below VIT.

During power on, RESET is asserted when supply voltage VDD becomes higher than 0.8 V. Thereafter, the supervisory circuit monitors VDD (and/or SENSE) and keeps RESET active as long as VDD or SENSE remains below the threshold voltage VIT. As soon as VDD (SENSE) rises above the threshold voltage VIT , RESET is deasserted again. The product spectrum is designed for 1.5 V, 3.3 V, and adjustable supply voltages. The devices are available in a 5-pin SC-70 package.

The TPS3803 and TPS3805 devices are characterized for operation over a temperature range of -40°C to +85°C.

Features

  • Single Voltage Detector (TPS3803): Adjustable/1.5 V
  • Dual Voltage Detector (TPS3805): Adjustable/3.3 V
  • High ±1.5% Threshold Voltage Accuracy
  • Supply Current: 3 µA Typical at VDD = 3.3 V
  • Push/Pull Reset Output (TPS3805) Open-Drain Reset Output (TPS3803)
  • Temperature Range: -40°C to +85°C
  • 5-Pin SC-70 Package
  • APPLICATIONS
    • Applications Using DSPs, Microcontrollers, or Microprocessors
    • Wireless Communication Systems
    • Portable/Battery-Powered Equipment
    • Programmable Controls
    • Intelligent Instruments
    • Industrial Equipment
    • Notebook/Desktop Computers
    • Automotive Systems

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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)
Watchdog Timer WDI (sec)
Rating
Operating Temperature Range (C)
Approx. Price (US$)
Threshold Voltage 2 (typ) (Typ) (V)
Pin/Package
TPS3805H33 TPS3803-01 TPS3803G15
2     1     1    
3.05     Adjustable     1.4    
1.3     1.3     1.3    
6     6     6    
3     3     3    
Active-low
Push-pull    
Active-low
Open-drain    
Active-low
Open-drain    
1.5     1.5     1.5    
0     0     0    
None     None     None    
Catalog     Catalog     Catalog    
-40 to 85     -40 to 85      
0.39 | 1ku     0.27 | 1ku     0.27 | 1ku    
Adjustable        
5SC70     5SC70     5SC70    

Other qualified versions of TPS3805H33

Version Part Number Definition
Enhanced Product TPS3805H33-EP Supports Defense, Aerospace and Medical Applications
Automotive TPS3805H33-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
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