L4931ABV50

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PMIC stands for Power Management Integrated Circuit and its related products, particularly those intended to provide power to digital integrated circuits. Voltage Regulators are typically integrated circuits used to produce a regulated output voltage from a varying input voltage source. Linear Voltage Regulators are designed to produce a fixed output voltage using a simple linear feedback loop. The L4931ABV50 (hereafter referred to as the L4931) is a two-terminal linear voltage regulator designed to provide a regulated output voltage of 5.0 volts. The L4931 is a general purpose linear regulator used in a variety of applications, and it is suitable for use in primary, secondary and tertiary voltage regulation.

Application Field

The L4931 is a versatile regulator, capable of supporting a wide range of applications. The device is typically used to provide voltage regulation for digital integrated circuits, such as microcontrollers and system-on-chip devices. It can also be used to provide power for off-line switching power supplies and battery chargers. Additionally, the device can be used in secondary regulation of transistors and FETs, and in computer memory systems. The device is also suitable for low-dropout (LDO) applications requiring a low quiescent current.

Specification

The L4931 features a built-in thermal shutdown and a precision-adjustable current limit. The device is capable of a maximum output voltage of 5.0 volts and a minimum operational input voltage of 3.1 volts. The rated output current is 250mA and the dropout voltage of the device is typically 1.2 volts. Additionally, the device features an 8-pin SOIC package with a support/detection pin, as well as an integrated status LED.

Working Principle

The L4931 is a two-terminal, linear voltage regulator. It operates on the principle of negative feedback, which is used to control the output voltage of the regulator. The device utilizes an internal comparison circuit, which compares the output voltage with a reference voltage and adjusts the voltage accordingly. When the output voltage exceeds the set voltage, the excess voltage is fed back to the input of the device, reducing the output voltage. Conversely, when the output voltage falls below the set voltage, the reduction in voltage is fed back to the input of the device, increasing the output voltage. This process continues until a stable output voltage is achieved.

The device also features an adjustable current limit, which can be used to limit the peak output current of the device to a safe operating level. When the current limit is exceeded, the device will shut down and enter a protection mode, in order to protect itself from over-current damage. Additionally, the device is equipped with a thermal shutdown feature, which allows the device to enter a protection mode if the temperature of the device exceeds a certain threshold.

Conclusion

The L4931ABV50 is a two-terminal linear voltage regulator designed to provide a regulated output voltage of 5.0 volts. The device features a built-in thermal shutdown and a precision-adjustable current limit. It is suitable for use in primary, secondary and tertiary voltage regulation, as well as in low-dropout (LDO) applications. The device is typically used to provide voltage regulation for digital integrated circuits, but it can also be used in off-line switching power supplies and battery chargers.

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