The TPS3808G01DBVR is a voltage supervisor and monitoring IC from Texas Instruments (TI). It is specifically designed for providing voltage monitoring for microprocessors and other digital circuits.
Package Information:
The model TPS3808G01DBVR comes in a SOT-23-5 package, which contains 5 pins. Here's the detailed breakdown of the pins:
Pin Function Specifications:
Pin Number Pin Name Pin Type Function Description 1 VOUT Output Voltage Output Pin: This pin outputs a logical low when the monitored voltage falls below the threshold, and high when the voltage is above the threshold. 2 GND Ground Ground Pin: This is the common reference point for all other voltages and is connected to the system ground. 3 SENSE Input Voltage Sense Pin: This pin is connected to the voltage rail that needs to be monitored. It detects the voltage and triggers the output accordingly. 4 RESET Output Reset Output Pin: When the monitored voltage is out of range, this pin asserts a reset signal to external devices. 5 EN Input Enable Pin: This pin is used to enable or disable the voltage supervisor. When this pin is held low, the device is disabled and does not perform monitoring functions.Circuit Principle:
The TPS3808G01DBVR operates by monitoring a designated supply voltage (connected to the SENSE pin) to ensure that it remains within a specified range. If the voltage falls outside the threshold, the RESET pin will be triggered to initiate a reset of the connected system. The VOUT pin provides an indicator of the system's status, such as whether the monitored voltage is within acceptable levels or not.
The enable pin (EN) allows users to control the device's functionality, preventing unnecessary operation when the monitoring feature is not required.
20 Frequently Asked Questions (FAQs) with Answers:
Q: What is the main function of the TPS3808G01DBVR? A: The TPS3808G01DBVR is a voltage supervisor IC that monitors the voltage levels of a system and asserts a reset signal if the voltage falls outside the defined range. Q: How does the TPS3808G01DBVR handle a voltage under threshold condition? A: When the monitored voltage falls below the threshold, the RESET pin is activated, signaling a system reset or alert. Q: What type of package does the TPS3808G01DBVR come in? A: The TPS3808G01DBVR is packaged in a SOT-23-5 package, which has 5 pins. Q: What is the function of the SENSE pin? A: The SENSE pin is used to connect the monitored voltage rail and detect whether it is within an acceptable range. Q: Can the TPS3808G01DBVR monitor multiple voltage rails simultaneously? A: No, the TPS3808G01DBVR is designed to monitor a single voltage rail at a time. Q: How does the device indicate that the voltage is out of range? A: The device asserts the RESET pin when the monitored voltage is out of range, signaling a reset or failure condition. Q: Is the EN pin active high or low? A: The EN pin is active low. When it is held low, the device is disabled. Q: What happens when the EN pin is set high? A: When the EN pin is set high, the TPS3808G01DBVR is enabled, and it begins monitoring the voltage rail. Q: What is the output voltage of the VOUT pin? A: The VOUT pin provides a logic level output indicating the status of the monitored voltage (high or low).Q: Does the TPS3808G01DBVR have overvoltage protection?
A: The TPS3808G01DBVR primarily monitors undervoltage conditions, but it may trigger a reset if the voltage falls outside the specified threshold.Q: Can the RESET output be used directly to reset a microcontroller?
A: Yes, the RESET pin can be connected to the reset input of a microcontroller to trigger a reset condition when necessary.Q: How precise are the threshold voltages on the TPS3808G01DBVR?
A: The TPS3808G01DBVR is designed with a precise voltage threshold to ensure accurate monitoring of system voltages.Q: Can the TPS3808G01DBVR monitor voltages above 6V?
A: The TPS3808G01DBVR is designed to monitor voltages typically below 6V. For higher voltages, a different voltage supervisor IC is recommended.Q: What should be done if the RESET pin is constantly low?
A: If the RESET pin is constantly low, it could indicate that the monitored voltage is outside the threshold range. Check the voltage at the SENSE pin to determine the cause.Q: What is the purpose of the GND pin?
A: The GND pin is the ground reference for the device and ensures that all signals and voltages are referenced to the same potential.Q: Can the TPS3808G01DBVR be used in battery-powered applications?
A: Yes, the TPS3808G01DBVR is suitable for battery-powered applications, where voltage monitoring is critical for proper system operation.Q: Is the TPS3808G01DBVR pinout compatible with other Texas Instruments voltage supervisors?
A: The pinout for the TPS3808G01DBVR is specific to the SOT-23-5 package and may not be directly compatible with all other voltage supervisors. Always verify pinouts in the datasheet.Q: Can the TPS3808G01DBVR be used to detect both undervoltage and overvoltage conditions?
A: The TPS3808G01DBVR is designed to primarily detect undervoltage conditions. For overvoltage detection, a separate component may be required.Q: How should the TPS3808G01DBVR be mounted?
A: The TPS3808G01DBVR should be mounted on a PCB according to the specifications in the datasheet, ensuring proper soldering of all 5 pins.Q: Is there a configuration option to adjust the voltage threshold of the TPS3808G01DBVR?
A: The voltage threshold of the TPS3808G01DBVR is fixed and not user-adjustable. It is selected based on the device’s part number and is defined in the datasheet.Conclusion:
The TPS3808G01DBVR from Texas Instruments is a compact voltage supervisor designed for monitoring and ensuring the stability of voltage rails in various electronic systems. The above specifications and FAQs give a comprehensive understanding of its pinout, functions, and operational features.
