Overview
The TPS3840DL42DBVRQ1 is a member of the TPS3840-Q1 family of voltage supervisors or reset ICs manufactured by Texas Instruments. This device is designed to operate in automotive and low-power applications, offering a combination of low power consumption, high accuracy, and low propagation delay. It features a wide input voltage range from 1.5 V to 10 V and is available in a 5-pin SOT-23 (DBV) package. The TPS3840-Q1 series is known for its nano-quiescent current, making it suitable for battery-powered devices and other power-sensitive applications.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 1.5 V to 10 V |
| Threshold Voltage (VIT-) | 1.6 V to 4.9 V in 0.1-V steps |
| Threshold Accuracy | 1% (Typ), 1.5% (Max) |
| Hysteresis (VIT+) | 100 mV (typical) for 1.6 V < VIT- ≤ 3.0 V, 200 mV (typical) for 3.1 V ≤ VIT- < 4.9 V |
| Start-up Delay (tSTRT) | 350 µs (Max) |
| Reset Time Delay (tD) | 50 µs (no capacitor) to 6.2 s (10-µF) |
| Manual Reset (MR) | Active-low |
| Output Topologies | Open-drain, active-low; Push-pull, active-low; Push-pull, active-high |
| Package | 5-pin SOT-23 (DBV) |
| Body Size | 2.90 mm × 1.60 mm |
Key Features
- Low quiescent current across the whole VDD and temperature range.
- High accuracy threshold voltage with built-in hysteresis.
- Programmable reset time delay using an external capacitor.
- Active-low manual reset with glitch immunity protection.
- Low power-on reset voltage (VPOR).
- Low open-drain output leakage current (ILKG(OD)).
- Fast start-up delay and low propagation delay (tp_HL = 30 µs typical).
Applications
- Automotive head unit and cluster.
- Automotive display, integrated cockpit, and driver monitoring systems.
- Telematics control unit and emergency call systems.
- Battery-powered and low-power applications.
Q & A
- What is the input voltage range of the TPS3840DL42DBVRQ1?
The input voltage range is from 1.5 V to 10 V. - What are the available threshold voltages for the TPS3840-Q1?
The threshold voltages range from 1.6 V to 4.9 V in 0.1-V steps. - What is the typical accuracy of the threshold voltage?
The typical accuracy is 1%, with a maximum of 1.5%. - How is the reset time delay programmed?
The reset time delay can be programmed using an external capacitor connected between the CT pin and ground. - What are the different output topologies available for the TPS3840-Q1?
The available output topologies are open-drain, active-low; push-pull, active-low; and push-pull, active-high. - What is the package type and size of the TPS3840DL42DBVRQ1?
The package is a 5-pin SOT-23 (DBV) with a body size of 2.90 mm × 1.60 mm. - What are some key applications of the TPS3840-Q1?
Key applications include automotive head units, automotive displays, telematics control units, and battery-powered devices. - Does the TPS3840-Q1 have built-in hysteresis and glitch immunity?
Yes, it features built-in hysteresis and glitch immunity protection for both the manual reset and the input voltage. - What is the maximum start-up delay of the TPS3840-Q1?
The maximum start-up delay is 350 µs. - What is the typical propagation delay of the TPS3840-Q1?
The typical propagation delay (tp_HL) is 30 µs.
