TPS3840-Q1 Texas instruments

TPS3840-Q1

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TPS3840-Q1

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Описание

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.

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)

Number of supplies monitored	1
Threshold voltage 1 (typ) (V)	1.6, 2.5, 2.7, 2.8, 2.9, 3, 3.1, 4.1, 4.2, 4.4, 4.5, Trimmable
Features	Manual reset capable
Reset threshold accuracy (%)	1.5
Iq (typ) (mA)	0.0003
Output driver type/reset output	Active-high, Active-low, Open-drain, Push-Pull
Time delay (ms)	0
Supply voltage (min) (V)	1.5
Supply voltage (max) (V)	10
TI functional safety category	Functional Safety-Capable
Rating	Automotive
Watchdog timer WDI (s)	None
Monitored voltage 1 (nom) (V)	1.6, 2.5, 2.7, 2.9, 4.2, Adjustable
Operating temperature range (°C)	-40 to 125