The part number TPS73733DCQR refers to a voltage regulator manufactured by Texas Instruments (TI). It belongs to their low dropout (LDO) regulator series.
Package Type:
TPS73733DCQR is a 5-pin device in a SOT-23 package.Pinout and Function Description:
Below is a detailed explanation of the pinout for the TPS73733DCQR LDO voltage regulator.
Pin Number Pin Name Pin Function Description 1 IN Input Voltage Pin: This is the input voltage to the regulator. This pin must be connected to the supply voltage that is higher than the desired output voltage. The voltage at this pin should be within the specified operating range to ensure proper function. 2 GND Ground Pin: This is the ground pin of the device. All the ground connections for the regulator circuit should be routed to this pin. 3 OUT Output Voltage Pin: This is the regulated output voltage. It should be connected to the load that needs a stable, regulated voltage. 4 EN Enable Pin: The EN pin is used to enable or disable the regulator. When this pin is pulled low, the regulator is disabled (output voltage is 0V). When it is pulled high, the regulator is enabled and will provide the regulated output voltage. 5 NC No Connect Pin: This pin is not internally connected to any circuitry. It can be left unconnected in your design.Explanation of Pin Function:
IN Pin (Pin 1): The input pin accepts a DC voltage from the source that needs to be regulated. This voltage must be higher than the target output voltage by a certain margin (typically around 1.1V higher, depending on the dropout voltage).
GND Pin (Pin 2): This pin serves as the reference ground for the entire regulator. A good ground connection ensures stable operation and minimal noise interference.
OUT Pin (Pin 3): The regulator outputs a stable, low-noise, and accurate voltage at this pin, which is used to power the downstream circuitry. The output is regulated, meaning it remains constant within a specified tolerance, even as input voltage or load current fluctuates.
EN Pin (Pin 4): The enable pin allows you to control the regulator’s state remotely. By driving this pin high (logic level "high"), the regulator is enabled and provides the output voltage. When this pin is low (logic level "low"), the regulator is turned off and no output voltage is generated.
NC Pin (Pin 5): This pin has no function and is left floating in the design. It is not connected to any circuitry inside the chip.
20 Frequently Asked Questions (FAQ):
Q1: What is the function of the EN pin in the TPS73733DCQR? A1: The EN pin is used to enable or disable the regulator. When pulled low, the regulator is disabled, and when pulled high, the regulator is enabled.
Q2: What is the maximum input voltage for the TPS73733DCQR? A2: The input voltage should be within the specified operating range, typically from 2.3V to 6V, to ensure proper operation of the regulator.
Q3: What is the dropout voltage of the TPS73733DCQR? A3: The dropout voltage is typically 40mV under light load conditions, meaning the input voltage needs to be at least 40mV higher than the output voltage for stable operation.
Q4: Can I use the TPS73733DCQR without connecting the NC pin? A4: Yes, the NC pin is not internally connected and can be left unconnected in your design.
Q5: What is the recommended capacitor configuration for the TPS73733DCQR? A5: Texas Instruments recommends using a 1µF ceramic capacitor on both the input and output for optimal performance.
Q6: How can I disable the output of the TPS73733DCQR? A6: You can disable the output by pulling the EN pin low.
Q7: What is the typical output voltage for the TPS73733DCQR? A7: The TPS73733DCQR typically outputs a voltage of 3.3V, but Texas Instruments offers different variants of the part for different output voltages.
Q8: Can I use the TPS73733DCQR in high current applications? A8: The TPS73733DCQR is designed for low-power applications and is not suitable for high current demands. Its maximum output current is around 500mA.
Q9: What should be the value of the input capacitor? A9: A 1µF ceramic capacitor is recommended to be placed at the input to minimize input voltage fluctuations.
Q10: Can the TPS73733DCQR be used in automotive applications? A10: The TPS73733DCQR is rated for industrial temperature ranges but may not be suitable for automotive environments, where extended temperature ranges are needed.
Q11: How do I calculate the required output voltage for the TPS73733DCQR? A11: The output voltage is fixed and cannot be adjusted in the TPS73733DCQR. If you need a different output voltage, you will need to choose a different part number.
Q12: What is the output voltage tolerance for the TPS73733DCQR? A12: The output voltage tolerance is typically ±2% of the nominal value, which is 3.3V in this case.
Q13: How does the TPS73733DCQR handle thermal protection? A13: The TPS73733DCQR has built-in thermal protection that shuts down the regulator if the internal temperature exceeds a safe threshold.
Q14: What is the efficiency of the TPS73733DCQR? A14: The efficiency of the TPS73733DCQR is mainly dependent on the input voltage and output current. Since it's a low dropout regulator, its efficiency is generally high under normal operating conditions.
Q15: Can I use the TPS73733DCQR for 5V output voltage? A15: No, the TPS73733DCQR is specifically designed for 3.3V output. You would need a different part if you require 5V.
Q16: What is the typical output noise of the TPS73733DCQR? A16: The output noise is typically very low, making it suitable for sensitive analog applications.
Q17: What is the maximum output current of the TPS73733DCQR? A17: The maximum output current for the TPS73733DCQR is 500mA.
Q18: Can I use the TPS73733DCQR in an IoT device? A18: Yes, the TPS73733DCQR is ideal for powering low-power devices such as IoT sensors and wireless communication module s.
Q19: How do I ensure stable operation of the TPS73733DCQR? A19: Ensure that the input and output capacitors meet the recommended values (1µF ceramic) and that the input voltage is within the specified range.
Q20: How can I improve the load transient response of the TPS73733DCQR? A20: The load transient response can be improved by using an appropriate output capacitor and minimizing PCB layout parasitics.
Summary:
The TPS73733DCQR is a voltage regulator with a simple 5-pin design: IN, GND, OUT, EN, and NC. This part is designed for low-power, low-noise applications and has an output voltage of 3.3V, suitable for a variety of electronic circuits. The part is easy to use, and with the recommended capacitor configurations and proper layout, it can offer stable and efficient performance in a wide range of applications.