MIC2205-1.6BML

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MIC2205-1.6BML Application Field and Working Principle

The MIC2205-1.6BML is an integrated monolithic dual phase synchronous buck controller from Microchip’s PIC family. It is widely used as an integrated low drop-out (LDO) voltage regulator and DC-DC switching regulator for desktop computers, laptops, mobile phones and other electronic devices. The device is capable of providing accurate regulated output voltages from 0.6V up to 5.5V with very low power consumption.

Overview of Features

The MIC2205-1.6BML is designed to operate in either CVCC (constant voltage continuous current) or CCM (continuous conduction mode) modes and can be used to deliver up to 2.5A of internal constant current to ensure operation at light load conditions. It also features an internal voltage detector that enables power-saving shutdown modes and other power saving features.

The device has several advantages, including extremely low drop-out voltage, low noise operation and very low EMI. Furthermore, it has excellent thermal performance and can operate over a wide temperature range, up to +175°C.

Application Field

The MIC2205-1.6BML buck converter IC is ideal for use in a wide range of voltage regulating and switching applications such as personal electronics, automotive, industrial, and telecom applications. It can also be used in a variety of low-voltage power applications such as mobile phones, digital cameras, and portable electronics. It is designed to provide accurate, low-loss power conversion and is also suitable for applications that require a high input voltage, such as notebook computers and other high-power applications.

Working Principle

The MIC2205-1.6BML is a synchronous buck controller, operating by swapping power between two energy-storing elements, typically an inductor and a capacitor. By utilizing PWM (Pulse Width Modulation) techniques, the controller is able to adjust the voltage level of the output in an efficient and precise manner. The PWM signal with the specific width is output from the controller microstrip to the synchronous MOSFETs. The microstrip carries the current from source to the gate of the MOSFET and controls the on- and off-states of the MOSFETs.

The timing and voltage level at the output is controlled by the power stage of the controller, which consists of two MOSFETs, one switching the high and one switching the low. The MIC2205-1.6BML controller is capable of detecting the output voltage by monitoring the voltage across a resistor divider. The feedback signal is then compared with a reference. A precise amount of current is output to the gates of the MOSFETs, and in turn, the level of output voltage is adjusted based on the tuned feedback signal.

The MIC2205-1.6BML controller provides excellent control of the output voltage and has very low noise and EMI. The device can also operate from a wide range of regulated input voltages and is ideal for use in a variety of low-voltage power applications.

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