L4931ABV25

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The L4931ABV25 is a linear voltage regulator that belongs to the integrated circuits, specifically the Power Management IC (PMIC). It is designed for systems that require low-dropout regulation and for those that are sensitive to applications in low-noise and low-ripple conditions. The Linear Voltage Regulator (LVR) is a type of voltage regulator that works by regulating the output to a specific voltage level in the event of a load change or supply voltage change.

The L4931ABV25 is an adjustable low-dropout regultaor that is ideal for a broad range of consumer and industrial applications, including micro-processor supervisory circuits and automotive applications. With an output voltage range of 1.2V to 25V, the device has wide input voltage range and a low-quiescent current setting options. The operating temperature range of the device is -40°C to +140°C, making it a viable choice for conditions of extreme temperature.

The L4931ABV25 voltage regulator operates with very low input voltage and offers excellent thermal tracking for over-temperature protection and improved line integrity. The device also features short-circuit protection, high-side current sensing with adjustable current limit, and over-voltage protection. Moreover, the output of the L4931ABV25 voltage regulator can be adjusted from 1.2V to 25V via two external resistors.

The L4931ABV25 has many applications, including battery protection and power supply for microprocessors and memory in PC systems, LCD displays, TV sets, and remote control. The device can also be used as a high-performance power supply for automotive, five-year shelf-life battery backup, and medical applications. Additionally, the L4931ABV25 design makes it a reliable and efficient choice for industrial applications.

The working principle of the L4931ABV25 is based on a linear-control design that involves two narrow-band operational amplifiers. The first operational amplifier (A1) compares the voltage reference (set point) to the output voltage. The second operational amplifier (A2) compares the current limit sensed by an external resistor to the output current. The comparison system is used to generate the error signal, which is used to control the base current of the pass transistor, thus regulating the output.

The overall working concept of the L4931ABV25 is as follows: During normal operation, the voltage reference is compared to the voltage across the output, and the absolute value of this difference is the error signal. This error signal is then amplified and used to control the input of the pass transistor. The response of the pass transistor to this error signal adjusts the current and the voltage, thus maintaining the desired voltage set point.

In terms of safety features, the L4931ABV25 offers short-circuit protection, output current limit sense with adjustable current limit, and over-temperature protection. Its output voltage can also be adjusted with two external resistors and the device can also be used with rechargeable batteries. The main advantages of the L4931ABV25 voltage regulator include its ability to provide low-noise and low-ripple performance, its high efficiency, reliability, and its ease of use.

The specific data is subject to PDF, and the above content is for reference