TPS70933DBVR Detailed explanation of pin function specifications and circuit principle instructions

The model number "TPS70933DBVR" corresponds to a specific component manufactured by Texas Instruments (TI). This part is a Low Dropout (LDO) Regulator. The package type for the "TPS70933DBVR" is SOT-23-5, which is a 5-pin package.

Here is a detailed explanation of the pin function specifications, the circuit principle, and instructions for this device, including the description of each pin in the package:

Pin Function and Description Table:

Pin Number Pin Name Pin Function Description 1 IN Input Voltage Pin: Connect this pin to the positive input voltage source. The typical voltage range for this pin is 2.5V to 6V. This pin provides the input power to the regulator. 2 GND Ground Pin: This pin is the ground connection of the regulator. It should be connected to the system ground to provide the reference for the regulator’s operation. 3 OUT Output Voltage Pin: This pin provides the regulated output voltage. The value of the output voltage is set by the internal circuitry. The typical voltage output is 3.3V. 4 EN Enable Pin: This pin is used to enable or disable the regulator. A logic high (typically 2V or above) enables the output, while a logic low disables it. 5 NC No Connection Pin: This pin is not internally connected and can be left floating or unconnected. It does not affect the operation of the regulator.

Function Description of Pins:

IN Pin (Input Voltage): The IN pin is used to provide the input voltage to the LDO regulator. The voltage applied to this pin must be within the specified range (2.5V to 6V). When selecting the input voltage, ensure that it is higher than the required output voltage by at least the dropout voltage (approximately 40mV at 100mA for the TPS70933DBVR). GND Pin (Ground): The GND pin is the reference ground for the regulator. It should be connected directly to the system ground, ensuring proper operation and voltage regulation. This pin plays a crucial role in establishing a common reference for all signals. OUT Pin (Output Voltage): The OUT pin provides the regulated voltage to the load. This pin outputs a fixed voltage, typically 3.3V, depending on the part number. The output voltage is stable and consistent within the regulator’s operating conditions. EN Pin (Enable): The EN pin controls the enablement of the regulator. When this pin is driven high, the LDO regulator is enabled, and the output voltage is active. When driven low, the regulator is disabled, and the output voltage is turned off. This pin provides a simple method of controlling the operation of the regulator from a logic signal. NC Pin (No Connection): The NC pin does not connect to any internal circuitry of the regulator. This pin can be left unconnected or floated, as it does not affect the operation of the part. It is provided in the package for manufacturing or assembly purposes.

Circuit Principle:

The TPS70933DBVR is a low dropout regulator designed to provide a stable 3.3V output from an input voltage source. The circuit works by regulating the input voltage through a feedback loop that adjusts the internal pass element to maintain the desired output voltage. The regulator can efficiently provide output voltage with minimal voltage drop between input and output, especially when the difference between input and output voltage is small (low dropout).

When the enable pin (EN) is set to high, the regulator starts to operate, and the voltage at the OUT pin is stabilized to 3.3V. If the EN pin is pulled low, the regulator shuts down, and the output voltage is reduced to zero.

FAQ (Frequently Asked Questions):

Q: What is the output voltage of the TPS70933DBVR? A: The TPS70933DBVR provides a fixed output voltage of 3.3V. Q: What is the input voltage range for the TPS70933DBVR? A: The input voltage range for the TPS70933DBVR is from 2.5V to 6V. Q: How do I enable the TPS70933DBVR? A: To enable the TPS70933DBVR, apply a logic high (2V or higher) to the EN pin. Q: What is the purpose of the EN pin? A: The EN pin is used to enable or disable the regulator. A logic high enables the regulator, and a logic low disables it. Q: Can I use the TPS70933DBVR with a 5V input? A: Yes, the TPS70933DBVR can operate with a 5V input, as long as the input voltage is within the 2.5V to 6V range. Q: How much dropout voltage does the TPS70933DBVR have? A: The dropout voltage of the TPS70933DBVR is very low, approximately 40mV at 100mA of output current. Q: What is the output current capability of the TPS70933DBVR? A: The TPS70933DBVR can deliver up to 150mA of output current. Q: Is the TPS70933DBVR a low dropout regulator? A: Yes, the TPS70933DBVR is a low dropout regulator, designed to work with a small voltage difference between the input and output. Q: How should I handle the NC pin? A: The NC pin should be left unconnected, as it does not have an internal connection and does not affect the regulator’s operation.

Q: What happens if I leave the EN pin unconnected?

A: If the EN pin is left unconnected, the regulator will typically be in an undefined state and may not function properly. It should be connected to a logic high or low signal to control the regulator.

Q: Can I use the TPS70933DBVR in a battery-powered circuit?

A: Yes, the TPS70933DBVR is suitable for battery-powered circuits as it can operate with low input voltages.

Q: How do I calculate the efficiency of the TPS70933DBVR?

A: The efficiency of the TPS70933DBVR can be calculated by the ratio of output voltage to input voltage, factoring in the dropout voltage and the power dissipated in the regulator.

Q: What type of package does the TPS70933DBVR come in?

A: The TPS70933DBVR comes in a SOT-23-5 package, which has 5 pins.

Q: What is the maximum input voltage for the TPS70933DBVR?

A: The maximum input voltage for the TPS70933DBVR is 6V.

Q: Can the TPS70933DBVR be used for high-power applications?

A: The TPS70933DBVR is designed for low-power applications and is limited to a maximum output current of 150mA, making it unsuitable for high-power applications.

Q: How should I connect the GND pin?

A: The GND pin should be connected to the system ground to establish a common reference for the voltage regulator.

Q: Can the TPS70933DBVR be used for noise-sensitive applications?

A: Yes, the TPS70933DBVR is designed with low noise performance, making it suitable for noise-sensitive applications.

Q: How do I prevent thermal shutdown of the TPS70933DBVR?

A: To prevent thermal shutdown, ensure that the regulator is operating within its thermal limits, and avoid excessive power dissipation by keeping the input voltage within an optimal range and managing the output current.

Q: Can I use the TPS70933DBVR in a switching regulator application?

A: No, the TPS70933DBVR is a linear regulator, not a switching regulator, and is not suitable for high-efficiency applications that require switching.

Q: What is the typical application for the TPS70933DBVR?

A: The TPS70933DBVR is typically used in low-power, portable applications where a stable 3.3V output is required, such as battery-powered devices, sensors, and microcontroller-based systems.

This detailed explanation covers the pin functions, usage instructions, and FAQs. It ensures that every pin's role is described comprehensively, along with the most common questions users may have about the device.