TPS3840 Nanopower high-input voltage supervisor with manual reset and programmable-reset time delay | TI.com

TPS3840 (PREVIEW)

Nanopower high-input voltage supervisor with manual reset and programmable-reset time delay

 

Sample availability

Preproduction samples are available. Order now

Description

The TPS3840 family of voltage supervisors or reset ICs can operate at high voltage levels while maintaining very low quiescent current across the whole VDD and temperature range. TPS3840 offers best combination of low power consumption, high accuracy and low propagation delay (tp_HL= 30 µs typical).

Reset output signal is asserted when the voltage at VDD drops below the negative voltage threshold (VIT-) or when manual reset is pulled to a low logic (VMR_L). Reset signal is cleared when VDD rise above VIT- plus hysteresis (VIT+) and manual reset (MR) is floating or above VMR_H and the reset time delay (tD) expires. Reset time delay can be programmed by connecting a capacitor between CT pin and ground. For a fast reset CT pin can be left floating.

Additional features: Low power-on reset voltage (VPOR), built-in glitch immunity protection for MR and VDD, built-in hysteresis, low open-drain output leakage current (ILKG(OD)). TPS3840 is a perfect voltage monitoring solution for industrial applications and battery-powered / low power applications.












Features

  • Wide Operating Voltage : 1.5 V to 10 V
  • Nano Supply Current : 350 nA (Typical)
  • Fixed Threshold Voltage (VIT-)
    • Threshold From 1.6 V to 4.9 V in 0.1-V steps
    • High Accuracy: 1% (Typical)
    • Built-in Hysteresis (VIT+)
      • 1.6 V < VIT- ≤ 3.1 V = 100 mV (Typical)
      • 3.2 V ≤ VIT- < 4.9 V = 200 mV (Typical)
  • Reset Time Delay (tD): Capacitor-Based Programmable
    • Minimum Time Delay: 80 µs (Maximum) Without Capacitor
  • Active-Low Manual Reset (MR)
  • Three Output Topologies:
    • TPS3840DL: Open-Drain, Active-Low (RESET)
    • TPS3840PL: Push-Pull, Active-Low (RESET)
    • TPS3840PH: Push-Pull, Active-High (RESET)
  • Wide Temperature Range: –40°C to +125°C
  • Package: SOT23-5 (DBV)

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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)
TPS3840 Order now Trimmable
2
2.5
2.7
2.8
2.9
3    
1     10     1.5     Active-high
Active-low
Open-drain
Push-pull    
Programmable     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 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    
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