Overview
The TPS3840PL18DBVR is a nano-power voltage supervisor from Texas Instruments, designed for high reliability and low power consumption. This device operates within a wide input voltage range of 1.5 V to 10 V, making it versatile for various applications. It features a nano-power supply current of typically 300 nA, which is crucial for battery-powered and energy-efficient systems. The TPS3840PL18DBVR includes a programmable reset time delay and an active-low manual reset (MR) function, enhancing its flexibility and control in system design.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VDD Input Supply Voltage | 1.5 | - | 10 | V |
| IDD Supply Current | - | 300 | 700 | nA |
| VIT- Negative-Going Input Threshold | 1.6 | - | 4.9 | V |
| VHYS Hysteresis on VIT- | 75 | 100 | 125 | mV (for VIT- ≤ 3.0 V) |
| VHYS Hysteresis on VIT- | 175 | 200 | 225 | mV (for VIT- > 3.0 V) |
| tSTRT Start-up Delay | - | 220 | 350 | µs |
| tD Reset Time Delay | 50 µs (no cap) | - | 6.2 s (10-µF cap) | s |
| VMR_L Manual Reset Logic Low Input | - | - | 600 | mV |
| VMR_H Manual Reset Logic High Input | - | - | 0.7VDD | V |
| TJ Junction Temperature | -40 | - | 125 | °C |
Key Features
- Wide Operating Voltage Range: 1.5 V to 10 V
- Nano-Power Supply Current: Typically 300 nA, maximum 700 nA
- Fixed Threshold Voltage: From 1.6 V to 4.9 V in 0.1-V steps with high accuracy (1% typical, 1.5% maximum)
- Built-in Hysteresis: 100 mV for VIT- ≤ 3.0 V and 200 mV for VIT- > 3.0 V
- Programmable Reset Time Delay: From 50 µs (no capacitor) to 6.2 s (10-µF capacitor)
- Active-Low Manual Reset (MR): Can be left floating when not in use
- Output Topologies: Push-pull active-low (TPS3840PL), push-pull active-high (TPS3840PH), and open-drain active-low (TPS3840DL)
- Wide Temperature Range: -40°C to +125°C
- Package: SOT23-5 (DBV)
Applications
- Grid Infrastructure: Circuit breakers, smart meters, and other monitoring and protection equipment
- Factory Automation: Field transmitters, PLCs (Programmable Logic Controllers)
- Building Automation: Fire safety systems, smoke detectors, HVAC systems
- Electronic Point of Sale: POS terminals and other retail systems
- Portable Devices: Battery-powered devices requiring low power consumption and reliable voltage supervision
Q & A
- What is the operating voltage range of the TPS3840PL18DBVR?
The operating voltage range is from 1.5 V to 10 V.
- What is the typical supply current of the TPS3840PL18DBVR?
The typical supply current is 300 nA.
- What are the threshold voltage options for the TPS3840PL18DBVR?
The threshold voltage ranges from 1.6 V to 4.9 V in 0.1-V steps.
- How is the reset time delay programmed in the TPS3840PL18DBVR?
The reset time delay can be programmed using an external capacitor connected to the CT pin, ranging from 50 µs (no capacitor) to 6.2 s (10-µF capacitor).
- What are the different output topologies available for the TPS3840?
The available output topologies are push-pull active-low (TPS3840PL), push-pull active-high (TPS3840PH), and open-drain active-low (TPS3840DL).
- What is the temperature range of the TPS3840PL18DBVR?
The device operates over a temperature range of -40°C to +125°C.
- What is the package type of the TPS3840PL18DBVR?
The package type is SOT23-5 (DBV).
- Can the manual reset (MR) pin be left floating?
- What are some common applications of the TPS3840PL18DBVR?
- How does the built-in hysteresis work in the TPS3840PL18DBVR?
The built-in hysteresis is 100 mV for VIT- ≤ 3.0 V and 200 mV for VIT- > 3.0 V, ensuring stable operation.
