1 Features

1? 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)

2 Applications

? Automotive head unit and cluster

? Automotive display, integrated cockpit and driver

monitoring

? Telematics control unit and emergency call

3 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.