TPS3840PL40DBVR

Wide Vin allows monitoring 9V rails or batteries without external components and 24V rails with external resistors. Nano-Iq extends battery life for low power applications and minimizes current consumption when using external resistors. Fast start-up delay allows the detection of a voltage fault before the rest of the system powers up providing maximum safety in hazardous start-up fault conditions. Low Power-on-Reset (V_POR) prevents false resets, premature enable or turn-on of next device, and proper transistor control during power-up and power-down. Reset output signal is asserted when the voltage at V_DD drops below the negative voltage threshold (V_Π-) or when manual reset (MR) is pulled to a low logic (V_MR-↓). Reset signal is cleared when V_DD rise above V_Π- plus hysteresis (V_IT+) and manual reset 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: Built-in glitch immunity protection for MR and V_DD, built-in hysteresis, low open-drain output leakage current (I_LKG(OD)).

Applications

• Grid infrastructure: circuit breaker, smart meter, other monitoring and protection equipment
• Factory automation: field transmitter, PLC
• Building automation: fire safety, smoke detector, and HVAC
• Electronic point of sale
• Portable, battery-powered systems

Key features

• Wide operating voltage: 1.5 V to 10 V
• Nano supply current: 300 nA (Typ), 700 nA (Max)
• Fixed threshold voltage (V_Π-)
• 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_Π- < 4.9 V = 200 mV (Typical)
• Start-up delay (tSTRT): 220 μs (Typ), 350 μs (Max)
• Programmable reset time delay (t_D): 50 μs (no capacitor) to 6.2 s (10-μF)
• Three output topologies:
• TPS3840DL: open-drain, active-low (RESET), requires pull-up resistor
• TPS3840PL: push-pull, active-low (RESET)
• TPS3840PH: push-pull, active-high (RESET)
• Wide temperature range: -40°C to +125°C
• Package: SOT23-5 (DBV)