The part number "TPS2553QDBVRQ1" belongs to Texas Instruments (TI), a well-known manufacturer of semiconductor devices, specializing in analog, digital, and mixed-signal integrated circuits.
For this particular part, the TPS2553 is a current-limiting Power distribution switch, designed for automotive and industrial applications. The QDBVRQ1 suffix indicates that it is the automotive-grade version of the device, with additional qualification to meet stringent automotive standards.
Package Type:
The TPS2553QDBVRQ1 comes in a QFN (Quad Flat No-lead) package with a 16-pin configuration.
Pin Function Description:
Here is a comprehensive list of the pin functions for the 16-pin QFN package of the TPS2553QDBVRQ1:
Pin Number Pin Name Pin Type Pin Function 1 IN Input This is the input voltage pin where the power source is applied. The input voltage range is typically 4.5V to 5.5V. 2 GND Ground Ground pin. This pin should be connected to the ground of the system. 3 OUT Output This is the output pin where power is distributed to the load. 4 ILIM Input This pin sets the current limit threshold. It can be connected to a resistor to adjust the limit. 5 FAULT Output The fault pin indicates a current-limiting fault. When the device detects an overcurrent condition, it pulls this pin low. 6 EN Input Enable pin. The device operates when this pin is pulled high. When low, the device is disabled. 7 REF Input Reference voltage input pin, used for internal regulation. 8 VOUT Output This is the regulated output voltage that powers the load. 9 PGND Ground Power ground pin. Connected to the power ground of the system. 10 RILIM Input A resistor connected here sets the current limit. 11 VDD Input Supply voltage pin for the internal circuitry of the device. 12 NC No Connection This pin is not connected to any internal circuitry and can be left floating or not connected. 13 GND Ground Ground pin. 14 STATUS Output The status pin provides feedback on the operational status of the device, such as whether it's functioning normally or in fault condition. 15 POK Output Power OK output, indicating that the output voltage is within the expected range. 16 NC No Connection This pin is not connected to any internal circuitry and can be left floating or not connected.Pin Function FAQs:
Q: What is the role of the IN pin in the TPS2553QDBVRQ1? A: The IN pin is used to apply the input voltage to the device, typically in the range of 4.5V to 5.5V.
Q: Can the GND pin be left unconnected? A: No, the GND pin must be connected to the ground of the system to complete the circuit.
Q: What happens when the FAULT pin is pulled low? A: When the FAULT pin is pulled low, it indicates that the device has detected a current-limiting fault condition.
Q: How does the ILIM pin affect the current-limiting feature? A: The ILIM pin is used to set the current limit by connecting a resistor, allowing the user to adjust the current threshold.
Q: Is the EN pin necessary for the device to function? A: Yes, the EN pin must be pulled high to enable the device. When pulled low, the device is disabled.
Q: What is the purpose of the REF pin? A: The REF pin provides a reference voltage for internal regulation, ensuring stable operation.
Q: Can the VOUT pin be used to power external devices? A: Yes, the VOUT pin provides the regulated output voltage that powers the connected load.
Q: What is the significance of the PGND pin? A: The PGND pin is the power ground pin and should be connected to the power ground of the system for proper operation.
Q: How is the current limit configured using the RILIM pin? A: A resistor connected to the RILIM pin sets the current limit threshold for the device.
Q: What is the function of the VDD pin? A: The VDD pin provides the supply voltage required for the internal operation of the TPS2553QDBVRQ1.
Q: Can the NC pins be used for any other purpose? A: No, the NC (No Connection) pins are not internally connected and should not be used for any other purpose.
Q: What does the STATUS pin indicate? A: The STATUS pin provides feedback on the device’s operational status, indicating whether the device is functioning normally or has encountered a fault.
Q: How does the POK pin work? A: The POK pin indicates whether the output voltage is within the expected range, providing a "Power OK" signal.
Q: Is it important to place decoupling capacitor s near the IN pin? A: Yes, decoupling capacitors should be placed close to the IN pin to filter noise and ensure stable operation.
Q: How can the TPS2553QDBVRQ1 protect against overcurrent? A: The device uses current-limiting and thermal-shutdown features to protect the system from overcurrent and overheating.
Q: Can the device work with voltages higher than 5.5V? A: No, the input voltage should not exceed 5.5V, as the device is rated for operation within a 4.5V to 5.5V range.
Q: What happens if the EN pin is left floating? A: If the EN pin is left floating, the device may not function as expected, as it could inadvertently remain disabled.
Q: How does the TPS2553QDBVRQ1 detect a fault condition? A: The device monitors the current flow and will activate the FAULT pin when it detects an overcurrent or short-circuit condition.
Q: Can the TPS2553QDBVRQ1 be used in high-power applications? A: The TPS2553QDBVRQ1 is designed for moderate current-limiting applications and may not be suitable for very high-power systems without additional considerations.
Q: How should I handle the NC pins during PCB design? A: The NC pins should be left unconnected and should not be routed to any internal circuitry.
This covers the comprehensive pin description, usage details, and FAQs for the TPS2553QDBVRQ1 device, providing a complete guide for understanding its pin functionality and typical use.
