LDK130PU33R

LDK130PU33R is a 3.3V linear (regulator) voltage regulator that is part of the DC-DC Controllers, PMIC (Power Management IC) product family from STMicroelectronics. It is specifically designed to be compatible with digital integrated circuits (IC\'s) and also has built-in protection functions in case of overload situations that enable safe operation in a wide variety of applications.

The LDK130PU33R is designed to provide adjustable output current up to 1 A and output voltage range up to 3.3V. The output voltage is regulated within very tight accuracy with its internal reference voltage source. It can also be used to operate from an input range from 4.5V to 18V, making it suitable for both low voltage and high voltage operation. Moreover, it features a shutdown pin, where when this pin is driven low, the LDK130PU33R will be disabled.

In terms of applications, LDK130PU33R can commonly be found in notebook computers, memory modules, embedded controllers, and other portable electronics products. In notebooks, it is usually used to regulate the voltage of the CRT displays, providing an optimal output current and voltage to suit the needs of the device. In memory modules, the LDK130PU33R is mainly used to regulate the supply voltage to the memory chips and provide an appropriate power supply for the memory cards. In embedded controllers and portable electronics, the LDK130PU33R is used to provide programmable current and voltage and often used in LED lighting applications.

In terms of its working principle, the LDK130PU33R is classified under linear voltage regulators as it regulates its output voltage by dissipating excess input energy in form of heat. It accomplishes this by utilizing a voltage divider circuit, consisting of a series of resistors, connected between the output and the (internal) reference voltage source. A voltage comparator is then used to compare the output voltage to the reference voltage source, and if the output voltage goes above the reference voltage source, it will activate the internal error amplifier which reduces the current flow from the input voltage source and thus limits the output voltage. Meanwhile, if the output voltage is below the reference voltage source, it will activate the internal error amplifier to increase the current flow from the input voltage source and thus raise the output voltage.

In conclusion, the LDK130PU33R is a 3.3V linear voltage regulator, usually used in a wide variety of applications such as notebook computers, memory modules, embedded controllers, portable electronics and LED lighting. Its working principle operates on a voltage divider circuit and a voltage comparator to regulate the output voltage.