FAN7318MX

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Power management integrated circuits (aka PMICs) are integrated circuits that provide a set of power management functions like regulating power supply and controlling power sequencing. They help to efficiently manage power supply and control power sequencing. Specialized PMICs like FAN7318MX are dedicated to particular applications and are designed to optimize a particular set of power management functions.

The FAN7318MX is a specialized PMIC designed for portable electronics. It is a power supply solution that combines current and voltage regulation to optimize a wide range of portable electronic devices, offering low power consumption, simple circuit structure and few external components. It is suitable for providing a stable and reliable power supply to applications such as tablets, PDAs, media players, and other portable devices.

Application

The FAN7318MX is a cost-effective and feature-rich solution for various applications. Its wide operating temperature range, support for Li-ion/ Li-polymer batteries and low external component count make it ideal for portable electronics and systems. It is specifically designed for one Boost converter, two buck converters, one linear regulator and multiple LDO regulators. The FAN7318MX offers a variety of features to support low power, energy saving and fail-safe operations in portable applications such as:

• Protection against over-current, over-voltage, under-voltage, etc.
• Programmable output voltage switching
• Output voltage monitoring
• Under-voltage Lockout (UVLO)
• Power Good signal and Enable signal programming

The device supports a wide input voltage range of 2.7V to 5.5V providing greater flexibility in portable applications. It supports an operating temperature range of -40°C to 85°C which makes it suitable for extreme temperatures.

Working Principle

The FAN7318MX includes one Boost converter, two Buck converters and one linear regulator along with multiple Low Dropout (LDO) regulators to support various power requirements. The Boost converter helps regulate the output voltage using feedback control to provide a stable source for system power. The Buck converters use PWM control with voltage and current feedbacks providing precise and high-accuracy output voltage and current regulation.

The linear regulator also provides precise voltage and current regulation, while allowing flexible current settings and supporting adjustable output voltage. The embedded LDO regulators offer an efficient and precise power supply with a typical output ripple of 50mV, adjustable output voltage, and adjustable output current.

The FAN7318MX offers a variety of safety features including overvoltage, overcurrent and undervoltage protection. It also supports a programmable power good signal that indicates the output of the converter is within the safe operating range and an enable signal that allows the user to control remote power-on/off operation. In addition, it can alert users with a low battery voltage warning signal.

Conclusion

The FAN7318MX is an optimized power management solution for portable applications. It features a wide operating temperature range, support for Li-ion/ Li-polymer batteries, low external component count, and a variety of safety features. Its Boost, Buck and linear converters, along with multiple LDO regulators, provide precise and efficient power regulation. This cost-effective PMIC is able to meet the demanding requirements of portable electronics such as tablets, media players, PDAs, and other portable devices.

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