TPS73533DRBR Detailed explanation of pin function specifications and circuit principle instructions

The part number "TPS73533DRBR" is part of the Texas Instruments (TI) product line. This part is a Low Dropout Regulator (LDO), typically used for providing stable and regulated output voltages with low noise and high accuracy for sensitive electronics applications.

Package Type (封装):

The "DRBR" in the part number denotes a VQFN-16 (Very thin Quad Flat No-lead) package. This package has 16 pins.

Pin Function Table for TPS73533DRBR:

Pin Number Pin Name Function Description 1 VIN Input voltage pin for the LDO. Provides the supply voltage that the regulator steps down. 2 VOUT Output voltage pin. The regulated output voltage is available at this pin. 3 GND Ground pin. Connect this to the system ground for proper operation. 4 EN Enable pin. A logic high level (typically 2V or higher) enables the regulator. A logic low level disables the regulator. 5 NC No connection. This pin is not internally connected to the chip and can be left unconnected. 6 NC No connection. This pin is not internally connected to the chip and can be left unconnected. 7 PG Power good pin. A logic high indicates that the output voltage is within a specified range and stable. When the output is out of regulation, this pin goes low. 8 FB Feedback pin. Connect a resistor network to set the desired output voltage. This pin regulates the output voltage based on the voltage at the feedback pin. 9 VOUT Output voltage pin. The regulated output voltage is available at this pin. 10 VIN Input voltage pin for the LDO. Provides the supply voltage that the regulator steps down. 11 GND Ground pin. Connect this to the system ground for proper operation. 12 EN Enable pin. A logic high level (typically 2V or higher) enables the regulator. A logic low level disables the regulator. 13 PG Power good pin. A logic high indicates that the output voltage is within a specified range and stable. When the output is out of regulation, this pin goes low. 14 FB Feedback pin. Connect a resistor network to set the desired output voltage. This pin regulates the output voltage based on the voltage at the feedback pin. 15 NC No connection. This pin is not internally connected to the chip and can be left unconnected. 16 NC No connection. This pin is not internally connected to the chip and can be left unconnected.

Pin Function Explanation:

VIN (Input Voltage Pin): This is where you apply the input voltage to the LDO regulator. It is the supply voltage that is regulated down to the desired output voltage. VOUT (Output Voltage Pin): This pin provides the regulated output voltage after the input voltage is stepped down by the LDO. It is the primary output for power delivery to the load. GND (Ground Pin): The ground pin connects to the system ground. Proper grounding is critical for stable operation and noise reduction. EN (Enable Pin): The enable pin allows you to turn the regulator on or off. A logic high (typically above 2V) enables the LDO, while a logic low (below 0.8V) disables it, conserving power when the regulator is not needed. NC (No Connection Pin): These pins have no internal connection to the chip. They are not used in the circuit and can be left unconnected. PG (Power Good Pin): This pin signals whether the output voltage is within the specified range. It provides a logic high (typically 3.3V or 5V) when the output voltage is within regulation, and a logic low when the output is out of regulation. FB (Feedback Pin): This pin is used to set the output voltage through an external resistor divider. The feedback pin helps the LDO maintain the output voltage as desired, ensuring stable regulation.

20 Frequently Asked Questions (FAQ):

What is the input voltage range for the TPS73533DRBR? The TPS73533DRBR can accept an input voltage range of 2.2V to 6V, depending on the specific configuration. How do I enable the TPS73533DRBR? To enable the TPS73533DRBR, apply a voltage of at least 2V to the EN pin. Can I use the TPS73533DRBR without the feedback pin? No, the feedback pin is required to regulate the output voltage. Without it, the output voltage cannot be properly controlled. What is the typical output voltage of the TPS73533DRBR? The output voltage is determined by the resistor network connected to the feedback pin. Typical output voltages include 3.3V, 5V, and custom values. What should I connect to the PG (Power Good) pin? The PG pin should be monitored by your system to detect when the output voltage is within regulation. What is the purpose of the NC (No Connection) pins? The NC pins are not used internally and can be left unconnected. What happens if I leave the EN pin floating? If the EN pin is left floating, the regulator may not behave predictably. It is recommended to either pull it high or low based on your needs. Can the TPS73533DRBR work without a capacitor at the output? It is recommended to use capacitors at both the input and output for stable operation and improved transient response. What is the output voltage tolerance of the TPS73533DRBR? The output voltage tolerance is typically ±2% for most configurations. Can I use the TPS73533DRBR in automotive applications? Yes, the TPS73533DRBR is suitable for automotive applications, but you should check the specific requirements for automotive grade parts. What is the maximum output current of the TPS73533DRBR? The TPS73533DRBR can deliver up to 3A of output current. What is the quiescent current of the TPS73533DRBR? The quiescent current (the current the LDO draws when there is no load) is typically around 40µA. What type of package does the TPS73533DRBR come in? The TPS73533DRBR comes in a 16-pin VQFN package. What is the thermal performance of the TPS73533DRBR? The thermal performance depends on the input voltage, output current, and the PCB design. It can operate in a wide range of temperatures, typically from -40°C to 125°C. How do I choose the correct feedback resistors? The output voltage is determined by the resistor divider connected to the feedback pin. Choose resistors based on the desired output voltage, following the LDO’s application guidelines. Can I use the TPS73533DRBR with very low input voltages? The TPS73533DRBR requires a minimum input voltage of 2.2V for proper operation. How can I protect the TPS73533DRBR from overcurrent conditions? The TPS73533DRBR includes built-in overcurrent protection. However, external fuses or circuit breakers can also be used for additional protection. Is the TPS73533DRBR suitable for powering sensitive analog circuits? Yes, the TPS73533DRBR is a low-noise LDO, making it ideal for powering sensitive analog circuits. Can I parallel multiple TPS73533DRBR regulators? While you can parallel regulators for higher current output, ensure proper design to avoid instability. What is the maximum dropout voltage of the TPS73533DRBR? The maximum dropout voltage is typically 100mV to 200mV, depending on the load current and output voltage.

If you need any more information or additional clarifications, feel free to ask!