TLV74318PDBVR

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The TLV74318PDBVR is a linear voltage regulator that belongs to the Power Management IC (PMIC) family of voltage regulators. It is a three-terminal, low-dropout (LDO) regulator capable of supplying up to 6A at an output voltage adjustable from 1.25V to 20V. It is designed specifically for portable applications such as cell phones, handsets, and other handheld devices where low quiescent current is required.

The TLV74318PDBVR provides a logic-controlled enable input, current limit protection and thermal shutdown protection. It is designed to operate from a wide input voltage range of 3V to 20V, making it suitable for use in 3 cell battery powered applications. The device also features a wide operating temperature range of −40 °C to +125 °C, making it suitable for industrial and automotive applications.

TLV74318PDBVR Application Field

The TLV74318PDBVR is ideal for use in a wide range of applications including:

• Cellular phones
• Portable Computers
• Portable game consoles
• Digital camcorders
• Industrial and automotive applications

TLV74318PDBVR Working Principle

The TLV74318PDBVR is a linear voltage regulator which works on the principle of an adjustable series pass circuit. The device consists of an error amplifier, a series pass transistor, a voltage reference and two bias inputs.

The circuit begins with the high-impedance input voltage source being fed into the error amplifier. The amplifier compares this input voltage to a fixed voltage reference. The difference between these two voltages is used to control the series pass transistor.

By controlling the resistance of the series pass transistor, the device is able to regulate the output voltage to the desired level. During normal operation, the regulator ensures that the output voltage remains constant regardless of input voltage variations or load current changes.

The enable input of the device is used to disable the regulator. When the enable input is low, the series pass transistor is fully turned off, disconnecting the output from the input and removing the load from the input supply. This allows for very low quiescent current operation.

Conclusion

In conclusion, the TLV74318PDBVR is a low-dropout linear voltage regulator designed specifically for portable applications. It is capable of supplying up to 6A of output current with an adjustable output voltage range from 1.25V to 20V. It features a wide operating temperature range, making it suitable for a variety of industrial and automotive applications. Its logic-controlled enable input and current limit protection provides reliable operation.

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