Overview
The TPS3840DL29DBVRQ1 is a member of the TPS3840-Q1 family of voltage supervisors from Texas Instruments. This device is designed for automotive and low-power applications, offering a wide operating voltage range from 1.5 V to 10 V and an ultra-low quiescent current of 350 nA (typical) and 700 nA (maximum). The TPS3840-Q1 is AEC-Q100 qualified, ensuring reliability in harsh automotive environments with an operating temperature range of –40°C to +125°C.
The device features a high accuracy fixed threshold voltage with built-in hysteresis, programmable reset time delay using an external capacitor, and an active-low manual reset. It is available in a compact 5-pin SOT-23 package, making it suitable for space-constrained designs.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Supply Voltage (VDD) | 1.5 | 10 | V | |
| Negative-Going Input Threshold Accuracy (VIT-) | -1.5% | 1% | 1.5% | % |
| Hysteresis on VIT- Pin (VHYS) | 75 mV (for VIT- = 1.6 V to 3.0 V) | 100 mV (for VIT- = 1.6 V to 3.0 V) | 125 mV (for VIT- = 1.6 V to 3.0 V) | mV |
| Hysteresis on VIT- Pin (VHYS) | 175 mV (for VIT- = 3.1 V to 4.9 V) | 200 mV (for VIT- = 3.1 V to 4.9 V) | 225 mV (for VIT- = 3.1 V to 4.9 V) | mV |
| Supply Current into VDD Pin (IDD) | 300 nA | 700 nA | nA | |
| Manual Reset Logic Low Input (VMR_L) | 600 mV | mV | ||
| Manual Reset Logic High Input (VMR_H) | 0.7VDD | V | ||
| Startup Delay (tSTRT) | 350 µs | µs | ||
| Reset Time Delay (tD) without Capacitor | 50 µs | µs | ||
| Package | SOT-23 (5-pin) |
Key Features
- AEC-Q100 qualified for automotive applications with an operating temperature range of –40°C to +125°C.
- Wide operating voltage range: 1.5 V to 10 V.
- Ultra-low quiescent current: 350 nA (typical), 700 nA (maximum).
- Fixed threshold voltage with high accuracy: 1% (typical), 1.5% (maximum), and built-in hysteresis.
- Programmable reset time delay using an external capacitor.
- Active-low manual reset with built-in glitch immunity protection.
- Three output topologies: open-drain active-low, push-pull active-low, and push-pull active-high.
- Compact 5-pin SOT-23 package.
Applications
- Automotive head units and clusters.
- Automotive displays, integrated cockpits, and driver monitoring systems.
- Telematics control units and emergency call systems.
- Battery-powered and low-power applications.
Q & A
- What is the operating voltage range of the TPS3840DL29DBVRQ1?
The operating voltage range is from 1.5 V to 10 V.
- What is the quiescent current of the TPS3840DL29DBVRQ1?
The quiescent current is 350 nA (typical) and 700 nA (maximum).
- What is the accuracy of the threshold voltage?
The threshold voltage accuracy is 1% (typical) and 1.5% (maximum).
- How can the reset time delay be programmed?
The reset time delay can be programmed using an external capacitor connected to the CT pin.
- What are the available output topologies for the TPS3840-Q1 family?
The available output topologies are open-drain active-low, push-pull active-low, and push-pull active-high.
- What is the package type of the TPS3840DL29DBVRQ1?
The package type is a 5-pin SOT-23.
- Is the TPS3840DL29DBVRQ1 AEC-Q100 qualified?
Yes, it is AEC-Q100 qualified for automotive applications.
- What is the operating temperature range of the TPS3840DL29DBVRQ1?
The operating temperature range is from –40°C to +125°C.
- What is the purpose of the manual reset (MR) pin?
The manual reset pin allows for asserting a reset signal by pulling it to a logic low.
- How does the device protect against glitches?
The device has built-in glitch immunity protection for both the manual reset and VDD inputs.
