LDK120M32R

The LDK120M32R linear voltage regulator is an integrated circuit designed for use as a positive voltage regulator in a wide range of applications on printed circuit boards. It features an active low-dropout (LDO) voltage regulator with a wide operating range, making it suitable for both traditional and automotive applications.

The LDK120M32R is designed to offer superior performance when compared to other linear regulators, such as the LDK120M09, due to its active low-dropout architecture. The active low-dropout feature allows the regulator to operate at lower voltages than traditional linear regulators, providing better performance and efficiency.

The LDK120M32R is a positive voltage regulator with a single output voltage of 3.3V, and is designed to provide a regulated output current of up to 32mA. It uses an external N-channel MOSFET to provide the current-limiting protection and precise output voltage regulation. The external MOSFET is connected in series and acts as a resistor, but with a low series resistance, and offers a high degree of flexibility and precise voltage control.

The LDK120M32R is also equipped with an advanced internal circuitry that helps to reduce the output noise, which is an important feature in modern applications. The regulator includes both an over-voltage and an over-temperature protection feature, as well as a current limit circuit, making it a complete and safe solution for most applications.

The working principle of the LDK120M32R is based on the use of the external MOSFET and its internal circuitry. The output voltage is set by two resistors: one connected between the output and the gate of the MOSFET, the other connected between the input and the gate. The output voltage is adjusted by varying the voltage at the gate of the MOSFET. The VBE of the MOSFET is adjusted so that it is always lower than the input voltage, and that the voltage at the output of the regulator is at the desired level. The output current is limited by the resistance of the MOSFET. The over-voltage protection is provided by a comparator circuit which monitors the voltage at the output and limits the voltage by reducing the current through the MOSFET when the voltage reaches a predetermined level. The over-temperature protection is enabled by an NTC thermistor connected between the drain and source of the MOSFET. The current limit circuit is also included, as well as other protection circuits that protect the integrated circuit from over-current and short circuit conditions.

The LDK120M32R can be used in a variety of applications, including automotive and industrial applications, where increased power efficiency and precise voltage regulation is required. It can also be used in audio amplifiers, baseband RF amplifiers, power management systems, and other applications where precise voltage regulation is required.

In conclusion, the LDK120M32R linear voltage regulator is a highly efficient and precise voltage regulator designed for use in a variety of applications. It features an advanced internal circuitry and active low-dropout design, as well as over-voltage and over-temperature protection features, making it a complete and safe solution for most applications.