MIC4681-5.0BM

MIC4681-5.0BM Application Field and Working Principle

The MIC4681-5.0BM is part of a family of integrated DC-DC converters from the MIC4681 series, and is classified as a voltage regulator and DC-DC switching regulator. This device may be used to provide a regulated output voltage in a wide range of applications, such as portable electronics, communications, and automotive. The device uses an internal integrated switch, which helps regulate the voltage over the device\'s adjustable operating range.

Features

• High efficiency: up to 97%
• High switching frequency: 1MHz typical
• Full programmability for various output voltages
• Low quiescent current, 2mA typical
• High energy efficiency switch
• Integrated soft start

Working Principle

The MIC4681-5.0BM integrated switch regulator combines the features of a charge pump buck/boost regulator with a low-side MOSFET switch. The IC uses an internal reference voltage to control the MOSFET switch, which controls the output voltage. The integration of the three components results in high efficiency and low noise switching. The device consists of an internal reference voltage set by a tiny external resistor and the MOSFET switch. The internal reference voltage is compared to the output voltage to determine the on/off states of the MOSFET switch. The reference voltage is created by the internal reference amplifier. When the output voltage is lower than the internal reference voltage, the MOSFET switch is turned on, connecting the input voltage to the output voltage. When the voltage reaches the set internal reference voltage, the switch is turned off and the charge pump then boosts the output voltage to the desired value.

Applications

The MIC4681-5.0BM can be used as a voltage regulator in a wide range of applications, such as portable electronics, communication systems, automotive and industrial systems. Possible applications for this device include BLDC (Brushless DC) Motor Drivers, AC/DC Power Conversion and DC/DC Converter Systems, Automotive Navigation Systems, Mobile and Wearable Technical Components and Portable Battery Chargers.

Conclusion

The MIC4681-5.0BM is a well-suited device for a wide range of applications, providing high efficiency and low noise switching. It is a great choice for applications that require efficient, low quiescent current voltage regulation and is suitable for both AC/DC power converters and DC/DC converter systems. Its small size and integrated switch offer a package size to fit into most designs. By combining the features of a charge pump buck/boost converter and an integrated MOSFET switch, the MIC4681-5.0BM is an ideal device for voltage regulation applications.