LDK120C15R

PMIC – Voltage Regulators – Linear

The linear voltage regulator is one of the most common and versatile power management components for embedded applications, such as LDK120C15R. It helps to convert an unregulated DC voltage from a source, such as a battery or a DC power supply, into a regulated output voltage. This allows the device to maintain a steady output voltage even when the input voltage varies. LDK120C15R is a step-down voltage regulator with adjustable output voltage which provides up to 15 A regulated output current.

Functionality:

LDK120C15R is a linear voltage regulator with a maximum input voltage of 20V and adjustable output voltage range of 0.84V to 20V. It is a step-down regulator which means that it can provide a constant output voltage that is lower than the input voltage. It is driven by an external N-channel MOSFET, which can be used to regulate output voltages from 0.84V to 20V.

The LDK120C15R also provides over-current protection, thermal shut-down, and output voltage monitoring for improved system reliability. It can be used in a wide variety of applications, including DC/DC converters, battery management systems, power supplies, and automotive applications.

Application Fields:

LDK120C15R is a versatile power management component designed for use in embedded and industrial applications. Its step-down regulator design helps to provide a regulated output voltage, even when the input voltage changes, making it ideal for use in powering microcontrollers, sensors, and other microprocessors. Its output voltage monitoring feature provides reliable protection against over-voltage, under-voltage, and over-current.

LDK120C15R is suitable for automotive applications due to its ability to monitor and regulate the output voltage. As a result, it can be used in applications such as electrical power steering and electric brakes. LDK120C15R can also be used in a variety of industrial and embedded applications, such as battery management systems, AC/DC converters, and power supplies.

Working Principle:

The working principle of LDK120C15R is based on the control loop circuit diagram. The device compares the feedback input voltage at the "FB" pin with the internal bandgap voltage reference. The internal error amplifier adjusts the gate voltage of the N-channel MOSFET to maintain a regulated output voltage. The feedback input voltage is derived from the output of the power stage.

The regulation of the output voltage is also affected by external components, such as the output capacitor, the current sense resistor, and the PWM generator. The output capacitor helps to maintain a stable output voltage while the current sense resistor limits the peak output current. The PWM generator is used to generate a pulse-width-modulated signal to ensure that the output voltage is accurately regulated.

Conclusion:

LDK120C15R is a versatile and reliable linear voltage regulator which can be used in a variety of embedded and industrial applications. Its step-down regulator design helps to provide a regulated output voltage, even when the input voltage changes, making it ideal for powering microcontrollers and other microprocessors. Its output voltage monitoring feature provides reliable protection against over-voltage, under-voltage, and over-current, making it suitable for use in automotive applications.

The device is also easy to use and requires only a few external components to be able to regulate the output voltage. Its control loop circuit diagram helps to explain the working principle of the device, and its features make it an ideal choice for any power management application.