L4931CPT25-TR

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The L4931CPT25-TR is a CMOS voltage regulator from STMicroelectronics. It is designed to provide polarity protection and to be the main component of a step-up, step-down and voltage inverting power supply circuit. It has an input voltage range of 3.3V to 30V and can output between 0V and29V. The output is adjustable. This device has overload and thermal protection features.

Application Field:

The L4931CPT25-TR can be used in a wide range of applications. It can be applied to power supplies in consumer electronic devices such as electronic game consoles, MP3 players, PDA and mobile phone. It can also be used as a voltage regulator in precision instruments and microcontrollers. It is designed to be used in battery-powered applications or with an external power supply.

Working Principle:

The L4931CPT25-TR is a 3-terminal voltage regulator. It has an input voltage range from 3.3V to 30V. The output voltage of the device is adjustable and can be set using the on-board trimpot. The output is stabilized by an error amplifier and the output current is limited by an internal current limiter. The device provides thermal protection and has an internal current protection feature. It is also capable of providing reverse polarity protection.

The L4931CPT25-TR is a monolithic integrated circuit and its working principle involves the use of CMOS technology. It is an under-voltage lockout feature that keeps the device from being activated until the input voltage rises above a certain level. The device is shut off when the input voltage falls below the under-voltage threshold.

The L4931CPT25-TR also has an overtemperature protection feature. The integrated circuit includes a thermal sensing diode, which is connected to the output. When the die temperature exceeds a certain threshold, the thermal sensing diode triggers the power off protection circuit. This helps to protect the device from overheating.

The L4931CPT25-TR is an ideal choice for battery-powered applications, enabling the device to operate in both step-up and step-down modes. Moreover, due to its high efficiency and low power consumption, the device is often used in applications where power consumption needs to be minimized.

In summary, the L4931CPT25-TR is an effective and efficient voltage regulator for use in a variety of applications. It has a wide input voltage range, adjustable output voltage and a number of features that make it suitable for use in battery-powered applications or with an external power supply. Its under-voltage lock out, current limiter and overtemperature protection features make it a safe and reliable device.

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