KA278R09CTU

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KA278R09CTU is a low-dropout voltage regulator (LDO) which is produced by KEC Semiconductor. KEC Semiconductor is a company based in Seoul, South Korea, which produces high quality integrated circuits (ICs) and discrete components. The KA278R09CTU is a linear, low-dropout regulator featuring a large input voltage range from 1.25V to 9V, capable of delivering up to 150mA of load current.

The KA278R09CTU application field includes a wide range of applications that require a precise, constant output voltage and an exceptionally low dropout voltage. Typical applications are CPU core power supplies, processors, TVs and monitors, multimedia systems, portable equipment, automotive, hand-held terminals, audio/visual and computer accessories, LCD modules and more.

The functional block diagram of the KA278R09CTU voltage regulator consists of three basic parts: an error amplifier, an enable pin to allow full control over the enable input, and an output stage. The error amplifier compares the output voltage with an internal reference voltage and adjusts the output voltage to the reference voltage. The enable pin allows the user to disable the output stage. The output stage consists of a power transistor, which is connected to the output capacitor, which stores the energy as the output voltage.

The KA278R09CTU also includes three additional features, which are the Under Voltage Lockout (UVLO), Thermal Shutdown (TSD), and Current Limit (CL). The UVLO feature helps protect the device from damage when the supply voltage is below a certain level. The TSD feature protects the device from damage due to excessive power dissipation. The current limit feature helps prevents excessive current from flowing through the device.

Working principle of the KA278R09CTU voltage regulator is to regulate the output voltage and current by comparing the output voltage with an internal reference voltage and adjusting the output voltage to the reference voltage. The KA278R09CTU contains a power transistor which is connected to the output capacitor. The output capacitor stores the energy as the output voltage.

The KA278R09CTU is a low dropout linear voltage regulator which is designed to operate in a wide range of applications. It features an EN input, Under Voltage Lockout (UVLO), Thermal Shutdown (TSD), and Current Limit (CL). The KA278R09CTU also has a high accuracy with a low quiescent current, making it an ideal choice for battery-powered applications.

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