TPS76933DBVR Detailed explanation of pin function specifications and circuit principle instructions

The part number you provided, TPS76933DBVR, corresponds to a voltage regulator manufactured by Texas Instruments (TI). The TPS76933 is a low-dropout (LDO) linear voltage regulator designed to deliver a stable output voltage with high efficiency, typically used in low-power systems. The "DBVR" suffix indicates the specific package type and configuration.

I will now provide a detailed explanation of the pin functions, package, and circuit principles, including the complete pinout list and a FAQ section.

Package Information

Package Type: SOT-23-5 Number of Pins: 5 pins

Pin Function Specifications

Here is the pinout for the TPS76933DBVR in the SOT-23-5 package:

Pin No. Pin Name Function Description 1 Vout Output Voltage: This is the regulated output voltage pin. It provides a stable voltage at the desired value (typically 3.3V in the case of the TPS76933). 2 GND Ground: This is the common ground pin for the device. It is the reference point for all voltages. 3 IN Input Voltage: This pin is connected to the input voltage supply that is higher than the regulated output voltage. 4 ON/OFF Enable Pin: This pin controls the activation of the regulator. A high signal (typically greater than 1.5V) turns the regulator on, and a low signal (less than 0.4V) turns it off. 5 NC No Connect: This pin is not internally connected to any circuitry. It can be left floating or connected to ground, depending on the application.

Circuit Principle

The TPS76933DBVR operates as a low-dropout (LDO) regulator. This means it is designed to regulate the output voltage even when the input voltage is very close to the output voltage, making it ideal for battery-operated applications. It uses an internal error amplifier and a pass transistor to maintain the output voltage. The ON/OFF pin allows for enabling or disabling the output voltage as needed.

FAQ (Frequently Asked Questions)

What is the input voltage range for the TPS76933DBVR? The input voltage range for the TPS76933DBVR is from 2.5V to 6.5V.

What is the output voltage for the TPS76933DBVR? The output voltage for the TPS76933DBVR is a fixed 3.3V.

What is the maximum output current for the TPS76933DBVR? The maximum output current for the TPS76933DBVR is 150mA.

How do I turn on the TPS76933DBVR? You can turn on the TPS76933DBVR by applying a voltage greater than 1.5V to the ON/OFF pin.

Can I leave the ON/OFF pin floating? No, you should not leave the ON/OFF pin floating. It should be driven high to turn the regulator on or low to turn it off.

What is the quiescent current for the TPS76933DBVR? The quiescent current (the current consumed by the regulator when no load is applied) is typically 30μA.

What is the dropout voltage for the TPS76933DBVR? The typical dropout voltage for the TPS76933DBVR is around 40mV at 50mA load and 120mV at 150mA load.

What happens if the input voltage drops below the output voltage? If the input voltage drops below the output voltage, the regulator will not be able to maintain the output voltage, and it will collapse to the input voltage.

Can I use the TPS76933DBVR with a higher output voltage? No, the TPS76933DBVR provides a fixed 3.3V output. For other voltages, you will need a different regulator model.

What is the package type for the TPS76933DBVR? The package type for the TPS76933DBVR is SOT-23-5, which is a small, 5-pin surface-mount package.

How should I connect the GND pin? The GND pin should be connected to the common ground of the circuit to ensure proper operation of the voltage regulator.

What is the temperature range of the TPS76933DBVR? The operating temperature range for the TPS76933DBVR is from -40°C to 125°C.

How should I filter the input and output of the TPS76933DBVR? It is recommended to place a 10µF ceramic capacitor on the input pin and a 10µF ceramic capacitor on the output pin for stability and filtering.

Is thermal shutdown protection included in the TPS76933DBVR? Yes, the TPS76933DBVR includes thermal shutdown protection to prevent damage in the event of overheating.

Does the TPS76933DBVR have overcurrent protection? Yes, the TPS76933DBVR has overcurrent protection to prevent damage from excessive load conditions.

Can the TPS76933DBVR be used for high-speed digital circuits? The TPS76933DBVR is designed for low-power analog applications and may not be suitable for high-speed digital circuits that require faster response times.

What is the output voltage tolerance for the TPS76933DBVR? The output voltage tolerance is ±2%, meaning the output voltage can vary by up to 2% from the nominal value.

Can I use the TPS76933DBVR in battery-powered applications? Yes, the low dropout voltage makes the TPS76933DBVR ideal for battery-powered applications where the input voltage is close to the desired output voltage.

How do I disable the TPS76933DBVR? To disable the TPS76933DBVR, pull the ON/OFF pin low (below 0.4V).

What is the recommended input capacitor for the TPS76933DBVR? A 10µF ceramic capacitor is recommended at the input for stability and proper operation.

This covers the pin functions, package details, and a comprehensive FAQ for the TPS76933DBVR voltage regulator from Texas Instruments.