FPF2180

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The F2180 is a power management integrated circuit (PMIC) from Fairchild Semiconductor. It is specifically designed for portable or hand-held device applications. It is a power distribution switch, load driver, and system monitor with mixed mode protection circuit. The F2180 is a state of the art device which improves system performance, simplifies PCB layout, and increases system reliability.

Features

The F2180 features mixed-mode protection, which provides both overpower protection and reverse polarity protection. This ensures that the device will not be damaged by input overvoltage, short circuit current, thermal overload and reverse voltage. The F2180 also has an adjustable soft start circuit to minimize current surge and extend component life.

The F2180 also has two independent switches for load control. These switches can be configured as either buck or boost mode, and can be used to control different outputs from a single power source. The F2180 also includes a low quiescent current voltage detector, which can be used to detect low battery voltage and signal when the battery has been depleted, or when the system is entering low power mode.

Applications

The F2180 is ideal for portable or hand-held device applications, such as cellular phones, MP3 players, pagers and Palm Pilots. The mixed-mode protection circuit and adjustable soft start circuit make it ideal for use in protecting sensitive components, while the two load control switches allow for efficient and precise load control. The F2180 is also suitable for general DC-DC converter applications.

Working Principle

The F2180 is based on a switched capacitor voltage converter topology, similar to a buck-boost voltage converter. In a switched capacitor voltage converter, the input voltage is stepped down or stepped up, depending on the required output voltage. The output is then regulated to the desired voltage by an internal control circuit.

The F2180 uses two switches to control the output voltage. The first switch connects and disconnects the input voltage to the output, while the second switch regulates the output voltage. The first switch, when connected, allows current to flow from the input to the output, while the second switch adjusts the output voltage by changing the ratio of the two connected capacitors. The two switches are operated in inverse phase to prevent the output voltage from exceeding the maximum voltage rating. The F2180 also includes a low-quiescent current voltage detector, which monitors the output voltage and signals when the output has been depleted, or when the system is entering low power mode.

In conclusion, the F2180 is an advanced power management integrated circuit, designed for portable and handheld applications. It is a power distribution switch, load driver and system monitor with mixed mode protection. The F2180 features adjustable soft start, reverse polarity protection, and two independent switches for load control. It is suitable for a range of applications, such as stand-alone DC-DC converters and battery-powered handheld devices.

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