MIC5239-3.3YM

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MIC5239-3.3YM: Application Field and Working Principle

The MIC5239-3.3YM is a low-dropout (LDO) regulator designed for a broad range of applications. It is an ultra-low-power linear regulator that provides low-current, low-voltage power supplies with exceptional accuracy and reliability. This product provides a low quiescent current and fast transient response with a very low noise (120mV), making it suitable for applications such as portable devices, wireless systems, and battery operated circuits.

The MIC5239-3.3YM features an extremely low dropout voltage of only 11mV at 1mA and a high-accuracy (±4%) voltage regulation, which ensures it provides reliable and accurate power supply. The operating temperature range of the regulator is from -40°C to +85°C, and it supports input voltage ranges of up to 28V, making it a versatile linear regulator choice.

The regulator also includes a number of protection features, including thermal protection, current-limit protection, and over-voltage protection. The device also has a shutdown feature, which when active will put the device in sleep mode to reduce quiescent current consumption. This makes it ideal for low-power applications that require extended battery life, such as those found in consumer electronics.

The MIC5239-3.3YM uses a two-stage architecture for voltage regulation, with an input voltage divider and an output voltage stabilizer. The input voltage divider is used to reduce the input voltage to the output voltage stabilizer section, while the output voltage stabilizer ensures that the output voltage is maintained at an accurate value. The output voltage stability is achieved by controlling the voltage drop across the two MOSFETs in the integrator circuit in the output stage. The MOSFETs are controlled by a control signal from the internal error amplifier.

The MIC5239-3.3YM is a very flexible linear regulator that is versatile and well suited to a wide range of applications, making it an excellent choice for a variety of products. Its low quiescent current, fast transient response, and excellent accuracy make it an ideal choice for applications such as wireless systems, portable devices, and low-current battery-operated circuits.

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