LT1185CT#PBF

LT1185CT#PBF Application Field and Working Principle

LT1185CT#PBF is a Linear Voltage Regulator that belongs to the PMIC (Power Management IC) family. It helps to regulate voltage and current accurately, by setting the reference voltage at 1.24V and the minimum input voltage at 8V. It is a very cost-efficient voltage regulator, common in many projects that require an accurate power supply and limited power consumption.

Application Fields

LT1185CT#PBF is commonly used in micro-controller/microprocessor applications such as PC/workstations, embedded systems and networking. It offers high power efficiency that has made it a popular choice in devices such as large LCD TVs, digital cameras, and laptop/notebook computers that require highly accurate and consistent power.

This voltage regulator provides an excellent balance between performance and cost, making it an ideal choice for many power supply applications. It can be used in systems that require a 12V or higher supply voltage, such as gaming consoles and cars; or it can be used in systems that require a lower voltage, such as residential or commercial applications.

Working Principle

LT1185CT#PBF operates as a linear regulator. It uses a feedback loop to sense any drops in the output voltage and adjusts the transistor base current accordingly to maintain the output voltage. It has a built-in current limit circuit that prevents the regulator from shutting down in the event of an overload.The voltage regulator is composed of three main parts: the output voltage controller, the reference voltage source, and the error amplifier. The output voltage controller consists of a pass transistor, a zener diode, and a current limit device. It directs current flow based on the current flowing through the pass transistor and the voltage across the zener diode.The reference voltage source provides a voltage to the reference pin of the LT1185CT#PBF, which is used to compare the output voltage to the desired value. The error amplifier amplifies the voltage differences between the output and the reference voltage and adjusts the pass transistor gate voltage to bring the output back to the desired level.