The "TPS3808G33QDBVRQ1" is part of Texas Instruments' product lineup. It is a voltage monitoring device designed to provide precise voltage detection for various applications, such as system reset functions and power-fail detection.
Pin Functions and Pinout Details for TPS3808G33QDBVRQ1
Package Type: The package type for this model is SOT-23-6, which has 6 pins.
The TPS3808G33QDBVRQ1 is specifically designed as a voltage supervisor for 3.3V systems, typically used in automotive and industrial applications. Below is a detailed explanation of each pin’s function.
Pinout for SOT-23-6 Package
Pin Number Pin Name Function Description 1 VDD This is the supply voltage pin. Connect this pin to the positive power supply (typically 3.3V). The pin provides power to the internal circuitry. 2 GND This is the ground pin. Connect this pin to the ground of the power supply. 3 RESET This is the active-low reset output pin. It indicates whether the monitored voltage is within range or not. When the monitored voltage is below the threshold, the pin outputs a low signal (RESET). 4 SENSE This is the voltage sense input. It connects to the monitored system voltage. The device compares this voltage with the threshold voltage to determine if a reset is required. 5 SET This is the threshold voltage setting pin. It is used to select the threshold voltage for monitoring. 6 RESET_N This pin is an active-high reset output. Similar to the RESET pin but with opposite logic. It provides an indication that the monitored voltage is within acceptable range.Full Pin Function and Usage Summary
VDD Pin (Pin 1): Supplies power to the internal circuits of the TPS3808G33QDBVRQ1. It must be connected to a stable 3.3V power supply. GND Pin (Pin 2): It is the ground reference for the device and should be connected directly to the ground of the circuit. RESET Pin (Pin 3): This is an active-low output that goes low when the voltage falls below the predefined threshold. It is used to reset the system when the monitored voltage is out of range. SENSE Pin (Pin 4): This pin senses the voltage from the monitored system. The voltage from this pin is compared with the threshold set by the SET pin. SET Pin (Pin 5): This pin is used to select the voltage threshold. By configuring external resistors, the threshold voltage for the reset function can be adjusted. RESET_N Pin (Pin 6): This is an active-high reset output. When the voltage is above the threshold, this pin will be high, indicating that the system is operating normally.FAQs for TPS3808G33QDBVRQ1 (in Q&A format)
Q: What is the recommended operating voltage for the TPS3808G33QDBVRQ1? A: The recommended operating voltage for the TPS3808G33QDBVRQ1 is 3.3V, provided through the VDD pin. Q: What is the purpose of the RESET pin? A: The RESET pin is an active-low output that signals when the monitored voltage falls below the threshold and a reset is needed. Q: Can the threshold voltage be adjusted? A: Yes, the threshold voltage can be adjusted by using the SET pin and configuring external resistors. Q: How does the TPS3808G33QDBVRQ1 handle power failures? A: When a voltage failure occurs or when the monitored voltage drops below the threshold, the RESET pin goes low to signal a power failure. Q: What is the function of the SENSE pin? A: The SENSE pin monitors the voltage from the system and compares it with the threshold voltage to decide whether a reset is required. Q: How does the RESET_N pin behave? A: The RESET_N pin is an active-high reset output. It provides an indication that the system voltage is within the acceptable range, opposite of the RESET pin. Q: Can I use the TPS3808G33QDBVRQ1 for monitoring voltages other than 3.3V? A: The TPS3808G33QDBVRQ1 is specifically designed for 3.3V systems. For other voltage levels, a different version of the TPS3808 series should be used. Q: How is the reset functionality triggered? A: The reset functionality is triggered when the voltage on the SENSE pin drops below the threshold voltage, as set by the SET pin. Q: What should I do if the RESET pin stays low even when the system voltage is normal? A: Ensure that the voltage on the SENSE pin is within the proper range and that the SET pin is correctly configured. If the issue persists, check for any external circuit faults.Q: What is the minimum voltage required on the VDD pin?
A: The minimum voltage for the VDD pin is typically 2.3V, but 3.3V is the ideal operating voltage.Q: How long does it take for the RESET pin to go low after the voltage drops?
A: The response time is typically very fast, and the reset signal will be asserted as soon as the monitored voltage falls below the threshold.Q: What is the maximum voltage that the TPS3808G33QDBVRQ1 can tolerate on the SENSE pin?
A: The maximum voltage on the SENSE pin is typically 6V, but it is recommended to stay within the operating range of 0 to 3.6V.Q: Is it possible to configure the TPS3808G33QDBVRQ1 for other voltage levels?
A: Yes, but external resistors are required to configure the threshold voltage for different levels.Q: Can the TPS3808G33QDBVRQ1 be used in automotive applications?
A: Yes, the TPS3808G33QDBVRQ1 is qualified for automotive applications under the AEC-Q100 standard.Q: Is there an internal pull-up or pull-down resistor on the RESET pin?
A: Yes, the RESET pin typically has an internal pull-up resistor to ensure the pin is high when the monitored voltage is within range.Q: What happens if the RESET pin is not connected to anything?
A: If the RESET pin is left floating or not connected, the device may not function properly, and a system reset may not be indicated.Q: Can I use the TPS3808G33QDBVRQ1 in battery-operated devices?
A: Yes, the low power consumption of the device makes it suitable for battery-operated systems.Q: What should I do if the system voltage is too high or too low?
A: If the voltage is out of range, the RESET pin will be triggered, and the system should take action to restore the voltage to the correct level.Q: How do I calculate the threshold voltage for the SET pin?
A: The threshold voltage is determined by using external resistors in a voltage divider configuration. Consult the datasheet for recommended resistor values.Q: What is the temperature range of the TPS3808G33QDBVRQ1?
A: The operating temperature range is typically from -40°C to +125°C, making it suitable for industrial and automotive environments.This detailed explanation and Q&A should cover the key functionalities and specifications of the TPS3808G33QDBVRQ1, as well as addressing common usage questions. If you need any more information or clarification, feel free to ask!
