MIC2131-1YTSE

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MIC2131-1YTSE Application Field and Working Principle

The MIC2131-1YTSE is a high performance, DC-DC switch mode controller primarily designed for step-down switching regulator uses in low-power, high efficiency applications. These controllers are available in a wide range of outputs and feature advanced current-mode control and adaptive on/off switching for a wide range of voltage conversion needs. The MIC2131-1YTSE is suited for many types of switch mode power supply, including flyback, boost and buck regulator applications.

Features and Advantages

The MIC2131-1YTSE switching regulator controllers provide superior performance and good reliability in a wide range of power conversion needs. It is designed to operate at very low supply voltages and low quiescent current and to provide selectable current limiting with overtemperature protection.

• High-performance current-mode control
• Adaptive on/off switching
• Wide input voltage range
• Programmable soft-start
• Integrated fault detection
• Selectable current limiting
• Over-temperature protection

Applications

The MIC2131-1YTSE switching regulator controllers are well-suited for many types of switch mode power supplies, including flyback, boost and buck regulator applications. Typical applications include USB wall power supplies, laptop chargers, point-of-load (POL) supplies, off-line component supplies and many other applications where efficiency is important.

Working Principle

The MIC2131-1YTSE is a current mode switching regulator controller. It is designed with an output voltage feedback loop, which compares the difference between the output voltage and the internal voltage reference. The controller then adjusts the average output current in order to keep the output voltage at the desired level. The output current is also limited by the current limit circuit.

In addition, an adaptive on/off switching technique is used to control the switching frequency in order to minimize switching losses. To further reduce losses, the controller features a programmable soft-start that ramps up the output voltage from an initial low level. The controller also has integrated protection features, such as over-temperature shut-down, to guard against damage or destruction in the event of an over-temperature condition or fault condition.

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