The model "TPS73533DRBR" is a voltage regulator from Texas Instruments (TI). It is part of their TPS73xx series of low-dropout (LDO) linear regulators, providing a stable output voltage with low noise. Below is the detailed explanation you requested regarding the pin function specifications, circuit principles, and pinout list, as well as a comprehensive FAQ.
1. Pinout and Function Descriptions for TPS73533DRBR
This part is housed in a VQFN-20 package, which has 20 pins. The 20 pins serve different purposes for input/output, ground, and voltage control. Below is the pin function list and its detailed description.
Pin Number Pin Name Pin Function Description 1 IN Input voltage pin. Connect the input voltage (typically 2.2V to 6V) to this pin. 2 IN Input voltage pin. It is recommended to use both IN pins for better current capacity. 3 VOUT Output voltage pin. This is the regulated output voltage pin (fixed at 3.3V for this version). 4 VOUT Output voltage pin. It is recommended to use both VOUT pins for better current capacity. 5 GND Ground pin. All grounds of the regulator, including the load, should be connected to this pin. 6 GND Ground pin. It is recommended to use both GND pins for better current capacity. 7 EN Enable pin. If this pin is pulled high (typically above 1.2V), the regulator is enabled. If pulled low, the regulator is disabled. 8 FB Feedback pin. Used for setting the output voltage if an adjustable version is used. In this fixed version (TPS73533), this pin is internally connected. 9 NC No Connection. This pin does not have any electrical function and should be left unconnected. 10 NC No Connection. This pin does not have any electrical function and should be left unconnected. 11 NC No Connection. This pin does not have any electrical function and should be left unconnected. 12 NC No Connection. This pin does not have any electrical function and should be left unconnected. 13 NC No Connection. This pin does not have any electrical function and should be left unconnected. 14 NC No Connection. This pin does not have any electrical function and should be left unconnected. 15 NC No Connection. This pin does not have any electrical function and should be left unconnected. 16 NC No Connection. This pin does not have any electrical function and should be left unconnected. 17 NC No Connection. This pin does not have any electrical function and should be left unconnected. 18 NC No Connection. This pin does not have any electrical function and should be left unconnected. 19 NC No Connection. This pin does not have any electrical function and should be left unconnected. 20 NC No Connection. This pin does not have any electrical function and should be left unconnected.2. Pin Count and Usage
This device comes in a 20-pin package. Among the 20 pins, several are used for input voltage, output voltage, enable, ground, and feedback, while others are not connected.
3. Circuit Principles
The TPS73533 is a Low Dropout (LDO) Regulator that ensures stable and accurate output voltage with minimal Power loss. Here’s the basic working principle:
Input Voltage: The input voltage pin is connected to the power source. Voltage Regulation: The regulator internally adjusts the output voltage to the specified value (3.3V for the TPS73533) with minimal voltage drop. Enable Pin: The enable pin allows the user to turn the regulator on or off. Feedback Pin: In adjustable versions, this pin is used to set the output voltage by connecting a resistor divider. For fixed versions, it is internally connected to set the voltage. Ground Pins: Multiple ground connections are provided for stability and to reduce the thermal resistance.4. FAQs for TPS73533DRBR
1. What is the input voltage range for the TPS73533DRBR?
The input voltage range is typically from 2.2V to 6V.2. Can I use the TPS73533DRBR in battery-powered circuits?
Yes, it is suitable for battery-powered applications where a stable 3.3V output is needed.3. What is the output voltage of the TPS73533DRBR?
The TPS73533DRBR has a fixed output voltage of 3.3V.4. How do I enable or disable the TPS73533DRBR?
You can enable or disable the device by controlling the EN pin. Pull it high (above 1.2V) to enable, and pull it low to disable.5. What is the maximum output current for the TPS73533DRBR?
The maximum output current is 3A, with a typical dropout voltage of 60mV at 1A.6. What type of package is the TPS73533DRBR available in?
It is available in a VQFN-20 package.7. How can I connect the input and output voltage pins?
Both the IN and VOUT pins should be connected properly to ensure stable operation. It is recommended to use both pins for better current capacity.8. Can the feedback (FB) pin be left unconnected in the fixed-output version?
Yes, in the fixed-output version of the TPS73533DRBR, the FB pin is internally connected and can be left unconnected.9. Can the TPS73533DRBR be used in high-temperature environments?
Yes, the TPS73533DRBR can operate in temperatures ranging from -40°C to 125°C.10. What is the typical dropout voltage for the TPS73533DRBR?
The typical dropout voltage is 60mV at 1A output current.11. How should the ground pins be connected?
The ground pins should be connected together and to the load's ground to ensure stable operation.12. How do I calculate the power dissipation for this device?
Power dissipation can be calculated by the formula: ( P = (V{IN} - V{OUT}) \times I_{OUT} ).13. Can the TPS73533DRBR be used in a switching power supply circuit?
No, the TPS73533DRBR is an LDO linear regulator, not a switching regulator.14. Is the TPS73533DRBR suitable for powering sensitive analog circuits?
Yes, the TPS73533DRBR is suitable for powering sensitive analog circuits due to its low output noise.15. What is the typical output noise of the TPS73533DRBR?
The typical output noise is 10μVRMS (0.1Hz to 100Hz).16. Does the TPS73533DRBR require external capacitor s?
Yes, it requires external input and output capacitors for stable operation.17. What are the recommended values for input and output capacitors?
Recommended values are 10µF for both input and output capacitors.18. How do I ensure stable operation with the TPS73533DRBR?
Ensure that both the input and output capacitors meet the recommended values for stability.19. Can I use the TPS73533DRBR for a higher output voltage?
No, the TPS73533DRBR has a fixed output voltage of 3.3V. You would need to use an adjustable version or a different regulator for other output voltages.20. What is the thermal shutdown temperature for the TPS73533DRBR?
The thermal shutdown temperature is typically 165°C, with a 15°C hysteresis.This provides a comprehensive guide on the TPS73533DRBR, its pin functions, and usage.
