TPS3840-Q1 Automotive high-input voltage supervisor with manual reset & programmable-reset time delay | TI.com

TPS3840-Q1 (PREVIEW) Automotive high-input voltage supervisor with manual reset & programmable-reset time delay

 

Sample availability

Preproduction samples are available. Order now

Description

The TPS3840-Q1 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-Q1 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-Q1 is a perfect voltage monitoring solution for automotive applications and battery-powered / low power applications.

Features

  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C7B
  • Wide operating voltage : 1.5 V to 10 V
    • Use external resistors to extend Vin range
  • Nano supply current : 350 nA (Typ), 700 nA (Max)
  • Fixed threshold voltage (VIT-)
    • Threshold from 1.6 V to 4.9 V in 0.1-V steps
    • High accuracy: 1% (Typ), 1.5% (Max)
    • Built-in hysteresis (VIT+)
      • 1.6 V < VIT- ≤ 3.0 V = 100 mV (typical)
      • 3.1 V ≤ VIT- < 4.9 V = 200 mV (typical)
  • Fast start-up delay (tSTRT): 350 µs (Max)
  • Programmable capacitor-based reset time delay:
    • tD: 50 µs (no capacitor) to 6.2 s (10-µF)
  • Active-low manual reset (MR)
  • Three output topologies:
    • TPS3840DL-Q1: open-drain, active-low (RESET)
    • TPS3840PL-Q1: push-pull, active-low (RESET)
    • TPS3840PH-Q1: push-pull, active-high (RESET)
  • Package: 5-pin SOT-23 (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-Q1 Order now Trimmable
1.6
2.5
2.7
2.9
4.2    
1     10     1.5     Active-high
Active-low
Open-drain
Push-pull    
Programmable     Manual reset     Automotive     -40 to 125     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    
TPS3836-Q1 Order now 2.25
2.64
2.93    
1     6     1.6     Active-low
Push-pull    
Programmable     Active-low enable
Manual reset    
Automotive     -40 to 125     None    
TPS3838-Q1 Order now 1.71
2.25
2.64
2.93    
1     6     1.6     Active-low
Open-drain    
Programmable     Active-low enable
Manual reset    
Automotive     -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