TPS3840-Q1

• 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 (V_IT-)
  • Threshold from 1.6 V to 4.9 V in 0.1-V steps
  • High accuracy: 1% (Typ), 1.5% (Max)
  • Built-in hysteresis (V_IT+)
    • 1.6 V < V_IT- ≤ 3.0 V = 100 mV (typical)
    • 3.1 V ≤ V_IT- < 4.9 V = 200 mV (typical)
• Fast start-up delay (t_STRT): 350 µs (Max)
• Programmable capacitor-based reset time delay:
  • t_D: 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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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 V_DD and temperature range. TPS3840-Q1 offers best combination of low power consumption, high accuracy and low propagation delay (t_{p_HL}= 30 µs typical).

Reset output signal is asserted when the voltage at VDD drops below the negative voltage threshold (V_IT-) or when manual reset is pulled to a low logic (V_{MR_L}). Reset signal is cleared when V_DD rise above V_IT- plus hysteresis (V_IT+) and manual reset (MR) is floating or above V_{MR_H} and the reset time delay (t_D) 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 (V_POR), built-in glitch immunity protection for MR and VDD, built-in hysteresis, low open-drain output leakage current (I_LKG(OD)). TPS3840-Q1 is a perfect voltage monitoring solution for automotive applications and battery-powered / low power applications.