The model "TLV1117-33IDCYR" is part of the Texas Instruments (TI) brand. It refers to a Low Dropout Regulator (LDO) with a fixed output voltage of 3.3V. Below is a detailed explanation of its specifications, pin functions, circuit principles, and usage.
TLV1117-33IDCYR Pin Functions and Specifications
The TLV1117 series are low dropout voltage regulators designed to provide stable output voltages. The "33" in the model name refers to the 3.3V output, and the "IDCYR" suffix indicates it comes in a specific SOT-223 package with a 5-pin configuration.
Package and PinoutPackage Type: SOT-223 Pin Count: 5 Pins
Pinout Configuration of TLV1117-33IDCYR (SOT-223 Package)
Pin No. Pin Name Description 1 VIN Input voltage pin; Connects to the power supply input voltage. 2 GND Ground pin; Connects to the ground of the circuit. 3 VOUT Output voltage pin; Provides a regulated 3.3V output. 4 NC No connection; this pin is unused and should be left floating or tied to GND. 5 ADJ Adjust pin (optional); Used to adjust the output voltage if the part is configured for an adjustable output version.TLV1117-33IDCYR Circuit Principle
The TLV1117 is a linear voltage regulator that uses a pass transistor (usually a NPN transistor) in the output stage to regulate the voltage. The operation is based on the difference between the input voltage (VIN) and the output voltage (VOUT), ensuring that the voltage difference (dropout voltage) is minimal.
Input Voltage (VIN): The voltage supplied to the input pin (Pin 1) should be higher than the output voltage (3.3V) by at least the dropout voltage. The dropout voltage is typically around 1.1V, so the input voltage should be at least 4.4V for stable operation.
Ground (GND): The ground pin (Pin 2) is essential for providing the reference to the regulator and ensuring proper operation.
Output Voltage (VOUT): The output pin (Pin 3) provides a regulated 3.3V output. The output voltage is stable as long as the input voltage is sufficiently higher than the dropout voltage.
Adjust Pin (ADJ): This pin is used to modify the output voltage for adjustable versions of the TLV1117. It can be connected to an external resistor divider to set a custom output voltage. In the fixed 3.3V version, this pin is typically left unconnected.
No Connection (NC): This pin (Pin 4) does not have a function in the TLV1117-33IDCYR and should be ignored or tied to ground if required by the circuit design.
FAQs for TLV1117-33IDCYR
1. What is the maximum input voltage for the TLV1117-33IDCYR?Answer: The maximum input voltage for the TLV1117-33IDCYR is 15V.
2. What is the dropout voltage for the TLV1117-33IDCYR?Answer: The typical dropout voltage is 1.1V at 800mA load current.
3. What is the output voltage of the TLV1117-33IDCYR?Answer: The output voltage is fixed at 3.3V.
4. How do I adjust the output voltage if I use the TLV1117-33IDCYR?Answer: The TLV1117-33IDCYR is a fixed 3.3V output regulator. For adjustable output, the TLV1117 family offers a different version with an adjustable voltage range, typically using the ADJ pin to set the voltage.
5. Can the TLV1117-33IDCYR be used for high-power applications?Answer: The TLV1117-33IDCYR is intended for low to moderate-power applications. Its maximum output current is typically around 800mA, so it is not suitable for high-power applications requiring larger currents.
6. What is the temperature range for the TLV1117-33IDCYR?Answer: The operating temperature range for the TLV1117-33IDCYR is -40°C to +125°C.
7. Can I use the TLV1117-33IDCYR to supply power to sensitive components?Answer: Yes, the TLV1117-33IDCYR provides a stable 3.3V output with low noise, making it suitable for powering sensitive components like microcontrollers and sensors.
8. What is the quiescent current for the TLV1117-33IDCYR?Answer: The typical quiescent current is 5mA, which is the current consumed by the regulator itself during operation.
9. What type of capacitor is recommended for the input and output of the TLV1117-33IDCYR?Answer: A 10µF ceramic capacitor is recommended at the input and output for stable operation, though higher values may be used depending on specific requirements.
10. How should I connect the ground pin (GND)?Answer: The ground pin (Pin 2) should be connected to the common ground of your circuit to ensure proper voltage regulation.
11. Can the TLV1117-33IDCYR be used in battery-powered circuits?Answer: Yes, as long as the input voltage is at least 1.1V higher than the 3.3V output, the TLV1117-33IDCYR can be used in battery-powered circuits.
12. How much output current can the TLV1117-33IDCYR supply?Answer: The TLV1117-33IDCYR can supply up to 800mA of output current under normal operating conditions.
13. Does the TLV1117-33IDCYR require external components to operate?Answer: While the TLV1117-33IDCYR does not require external components for basic operation, adding Capacitors at the input and output will help improve stability and transient response.
14. Is thermal shutdown protection provided in the TLV1117-33IDCYR?Answer: Yes, the TLV1117-33IDCYR includes thermal shutdown protection to prevent overheating and damage when the chip operates outside safe temperature limits.
15. What is the maximum power dissipation for the TLV1117-33IDCYR?Answer: The maximum power dissipation depends on the input voltage and output current. It can be calculated using the formula: ( P = (V{IN} - V{OUT}) \times I_{OUT} ).
16. How do I calculate the efficiency of the TLV1117-33IDCYR?Answer: The efficiency of the TLV1117-33IDCYR can be approximated as the ratio of output voltage to input voltage, i.e., ( \text{Efficiency} = \frac{V{OUT}}{V{IN}} ).
17. Can the TLV1117-33IDCYR be used for 5V systems?Answer: The TLV1117-33IDCYR is designed for 3.3V systems. For 5V systems, you should use a 5V version of the TLV1117, such as the TLV1117-05.
18. How does the TLV1117-33IDCYR handle input voltage fluctuations?Answer: The TLV1117-33IDCYR regulates the output voltage within its specified range even with fluctuations in the input voltage, as long as the input voltage is at least 1.1V higher than the output.
19. What is the maximum output capacitance for the TLV1117-33IDCYR?Answer: The TLV1117-33IDCYR can handle output capacitances up to 10µF without stability issues. Capacitors larger than 10µF may be used, but care should be taken to avoid oscillations.
20. Is the TLV1117-33IDCYR protected from short circuits?Answer: Yes, the TLV1117-33IDCYR features current limiting and short circuit protection to prevent damage to the device.
This concludes the detailed explanation of the TLV1117-33IDCYR. I hope this information meets your requirements! Let me know if you need further assistance.
