Overview
The TPS3808G12QDBVRQ1 is a low-quiescent-current programmable-delay supervisory circuit produced by Texas Instruments. This device is designed to monitor system voltages and provide a power-on reset function with adjustable delay times. It is particularly suited for applications requiring high threshold accuracy and low power consumption, making it ideal for battery-powered systems and automotive applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Threshold Voltage (VIT) | 1.2 V | V |
| Threshold Accuracy | ±0.5% (typical for VIT ≤ 3.3 V) | % |
| Quiescent Current | 2.4 μA (typical) | μA |
| Reset Delay Time | 1.25 ms to 10 s (adjustable) | ms/s |
| Manual Reset (MR) Input | Logic low (0.3 VDD) to assert reset | - |
| RESET Output | Open-drain | - |
| Temperature Range | –40°C to +125°C | °C |
| Package | SOT-23 (6-pin) | - |
Key Features
- Power-on reset generator with adjustable delay time from 1.25 ms to 10 s.
- Very low quiescent current of 2.4 μA (typical), suitable for battery-powered applications.
- High threshold accuracy of ±0.5% (typical) for VIT ≤ 3.3 V.
- Fixed threshold voltages available for standard voltage rails from 1.2 V to 5 V, and adjustable voltage down to 0.4 V.
- Manual reset (MR) input for initiating a reset.
- Open-drain RESET output.
- Immune to short negative transients on the SENSE pin.
- Qualified for automotive applications.
Applications
- DSP or microcontroller applications.
- FPGA and ASIC applications.
- Automotive vision systems.
- Automotive radar systems.
- Battery-powered systems requiring low power consumption.
Q & A
- What is the primary function of the TPS3808G12QDBVRQ1?
The primary function is to monitor system voltages and provide a power-on reset with adjustable delay times.
- What is the typical quiescent current of the TPS3808G12QDBVRQ1?
The typical quiescent current is 2.4 μA.
- How can the reset delay time be adjusted?
The reset delay time can be adjusted by connecting the CT pin to VDD using a resistor, leaving it open, or connecting it to an external capacitor.
- What is the temperature range of the TPS3808G12QDBVRQ1?
The temperature range is –40°C to +125°C.
- What types of packages are available for the TPS3808G12QDBVRQ1?
The device is available in a 6-pin SOT-23 package.
- How does the manual reset (MR) input work?
A logic low (0.3 VDD) on the MR input causes the RESET signal to assert low.
- What is the threshold voltage for the TPS3808G12QDBVRQ1?
The threshold voltage is 1.2 V.
- Is the TPS3808G12QDBVRQ1 qualified for automotive applications?
- How accurate is the threshold voltage of the TPS3808G12QDBVRQ1?
The threshold accuracy is ±0.5% (typical) for VIT ≤ 3.3 V.
- What types of systems can benefit from using the TPS3808G12QDBVRQ1?
It is beneficial for DSP, microcontroller, FPGA, ASIC, automotive vision, and automotive radar systems, as well as battery-powered systems.
