TPS3840DL46DBVRQ1

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 (overline) 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 (VΠ-) or when manual reset is pulled to a low logic (VMR- L). Reset signal is cleared when VDD rise above VΠ- plus hysteresis (VΠ+) 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 (overline) 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.

Applications

• Automotive head unit and cluster
• Automotive display, integrated cockpit and driver monitoring
• Telematics control unit and emergency call

Key features

• Meets automotive application standards, AEC-Q100 qualified with the following results:
• Device temperature grade 1: ambient operating temperature range -40°C to +125°C
• Device HBM ESD classification level 2
• Device CDM ESD classification level C7B
• Wide operating voltage range: 1.5V to 10V
• Extended Vin range via external resistor
• Nanoamp supply current: 350nA typical, 700nA maximum
• Fixed threshold voltage (VIT-)
• Threshold range from 1.6V to 4.9V in 0.1V steps
• High accuracy: 1% typical, 1.5% maximum
• Internal hysteresis (VIT+)
• 100mV typical when 1.6V < VIT- ≤ 3.0V
• 200mV typical when 3.1V ≤ VIT- < 4.9V
• Fast startup delay (tSTART): 350µs maximum
• Capacitor-based programmable reset time delay:
• tD: 50µs with no capacitor, 6.2s with 10µF capacitor
• 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)