LX8117B-33CST

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Power management integrated circuits, commonly referred to as PMICs, are a vital component to any design that requires power routing and/or voltage regulation. Without them, power routing and voltage regulation would be nearly impossible, and the reliability of such a system would be highly questionable at best. One of the key functions of a PMIC is the implementation of a voltage regulator, which is designed to produce an output voltage that is fixed, regardless of input variations. Among the types of voltage regulators available, linear voltage regulators are the simplest and most widely used. The LX8117B-33CST is an example of a linear voltage regulator, and this article will look at the application field and working principle of the part.

The LX8117B-33CST is a low dropout, positive linear voltage regulator from Lite-On Semiconductor. It is designed to provide a fixed 3.3 volts output voltage, with a maximum input voltage of 11V. It is capable of delivering up to 0.8A of output current and has an output voltage tolerance of +-2%. It also has a very low quiescent current - only 3.6uA. The part is a single-channel, low drop-out, high PSRR (power supply rejection ratio) voltage regulator that is optimized for ultra-low power designs. The LX8117B-33CST is available in a tiny DFN 2x2x0.6mm package, making it suitable for space-constrained applications.

The LX8117B-33CST is designed for a wide range of applications, including embedded systems, mobile devices, and other consumer electronics. It is well suited for application that require ultra-low power, such as wireless sensors, battery-powered equipment (including IoT devices), and can be used in automotive applications. The LX8117B-33CST is also suited for use in battery-charging systems, and its low voltage dropout makes it suitable for applications with supply voltages close to the output voltage.

The working principle of the LX8117B-33CST is relatively simple. The LX8117B-33CST has internal reference voltage generators, transconductance amplifiers, and current mirror circuits to generate its output voltage. The transconductance amplifier sets the output voltage based on the reference voltage. The internal current mirror compares the output voltage to the reference voltage and adjusts the voltage level accordingly. The internal circuitry of the LX8117B-33CST also includes feedback circuitry to further enhance the accuracy and stability of the output voltage.

The LX8117B-33CST is a low dropout, high accuracy, and low power linear voltage regulator that is well suited for space-constrained applications. It is suitable for a wide range of applications, including embedded systems, mobile devices, IoT devices, and battery-charging systems. Its working principle is based on the use of internal reference voltages, transconductance amplifiers, and current mirror circuits to generate a stable output voltage.

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