TPS79333DBVR Detailed explanation of pin function specifications and circuit principle instructions (2)
The "TPS79333DBVR" is a product from Texas Instruments (TI). It is a low dropout (LDO) voltage regulator, which provides a stable output voltage for systems requiring precise voltage regulation, even when the input voltage is close to the output voltage.
Package Type:
The "TPS79333DBVR" comes in a SOT-23-5 package. This package is a small, surface-mount type with 5 pins, commonly used for low-power applications where board space is limited.
Pin Function and Circuit Principle:
Pinout Description of TPS79333DBVR (SOT-23-5 Package):The 5 pins of the TPS79333DBVR are as follows:
Pin Number Pin Name Pin Function 1 VIN Input voltage pin. Connect this pin to the input voltage source (typically higher than the output voltage). 2 GND Ground pin. Connect this pin to the system ground. 3 EN Enable pin. When this pin is high (typically above 1.4V), the regulator is enabled. 4 VOUT Output voltage pin. This is where the regulated output voltage is available. 5 NC No connection pin. This pin is not used and should be left floating. Detailed Explanation of Pin Functions: VIN (Input Voltage): This is where the input voltage is supplied. The voltage here must be higher than the regulated output voltage (by at least the dropout voltage of the LDO regulator). It can range from 2.7V to 6V depending on the device. GND (Ground): This is the ground pin that connects the device to the system ground. All voltages are referenced to this pin. EN (Enable): The enable pin is used to turn the regulator on or off. When the enable pin is pulled high, the regulator is active and provides the regulated output voltage at VOUT. When low, the regulator is disabled, and the output voltage is disconnected. VOUT (Output Voltage): The regulated output voltage is provided at this pin. For the TPS79333DBVR, the output voltage is 3.3V, which remains stable even if the input voltage varies within the specified range. NC (No Connect): This pin is not connected to any internal circuitry of the device. It can be left floating on the PCB and is typically used for mechanical alignment or for packages with different pin configurations.Circuit Principle:
The TPS79333DBVR is a Low Dropout Regulator (LDO), meaning it can regulate the output voltage efficiently even when the input voltage is very close to the output. It uses internal circuitry to monitor and control the output voltage to maintain a stable value despite variations in the input or load.
When the enable pin (EN) is high, the regulator is active. The input voltage is filtered and passed through an internal pass transistor to the output, ensuring a clean, regulated 3.3V output. The dropout voltage is minimal, allowing it to work effectively in systems with tight input-output voltage differences.
Frequently Asked Questions (FAQs) for TPS79333DBVR:
What is the input voltage range for TPS79333DBVR? The input voltage range is from 2.7V to 6V.
What is the output voltage of TPS79333DBVR? The output voltage is a stable 3.3V.
Can the TPS79333DBVR be used for power-sensitive applications? Yes, it is designed for low power consumption, making it suitable for battery-powered applications.
What is the dropout voltage for TPS79333DBVR? The typical dropout voltage is 40mV at 100μA load and 120mV at 50mA load.
What package does TPS79333DBVR come in? It comes in a SOT-23-5 package.
What is the current output capability of TPS79333DBVR? It can supply up to 150mA of output current.
Can I use TPS79333DBVR in automotive applications? Yes, it can operate over a wide temperature range, making it suitable for automotive applications.
How can I enable the TPS79333DBVR? The regulator is enabled by applying a high voltage (typically >1.4V) to the enable (EN) pin.
What happens if the input voltage is lower than the output voltage? If the input voltage drops below the output voltage, the regulator will not be able to maintain a stable output, and it will turn off.
What should I connect to the NC pin? The NC pin is not connected internally, so it can be left unconnected on the PCB.
How should I use the EN pin? The EN pin should be pulled high to enable the regulator. Pulling it low will disable the regulator.
Is the TPS79333DBVR suitable for high-load applications? No, it is designed for low-power, low-current applications (up to 150mA).
What is the maximum input voltage for the TPS79333DBVR? The maximum input voltage is 6V.
Can I use the TPS79333DBVR for 5V output regulation? No, the TPS79333DBVR is designed specifically for 3.3V output.
Does the TPS79333DBVR include over-temperature protection? Yes, it has built-in thermal shutdown protection to prevent overheating.
What is the quiescent current for TPS79333DBVR? The quiescent current is typically 25μA.
How should I handle the EN pin to prevent noise? Use a decoupling capacitor (typically 0.1μF) near the EN pin to reduce noise.
Does the TPS79333DBVR have any output capacitor requirements? Yes, it is recommended to use a 10μF ceramic capacitor at the output for stability.
Can I use the TPS79333DBVR in a compact mobile device? Yes, the small SOT-23-5 package and low power consumption make it ideal for mobile devices.
What is the typical application for TPS79333DBVR? It is ideal for powering low-voltage analog circuits, microcontrollers, and sensors in portable, battery-powered devices.
