AN78L08

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The AN78L08 is an 8 pin voltage regulator of the Linear type, which falls under the Power Management ICs category. It is used in many consumer electronics and computer peripheral products. It consists of a low-dropout (LDO) linear voltage regulator, allowing it to provide a well-regulated output voltage. Its high current dual output capability makes it an ideal choice for off-board power conditioning in a number of battery operated and portable electronic system designs.

The AN78L08 ensures several user-configurable features. These features include a programmable output voltage, with a range of up to 8.32V, and over-voltage protection. It also features a programmable output current limit for a higher current draw capability than the industrial standard LDO ICs. Additionally, it has integrated thermal protection that limits the peak temperature of the device.

The AN78L08 uses a two-stage linear voltage regulating system. The first stage is a reverse biased PNP transistor is biased on. This transistor helps to condition and to match the output voltage to the set regulator output. The second stage is a series pass transistor that forms the linear regulator. The voltage loss through the transistor is determined by the size of the base resistor. This allows the regulating series pass transistor to be adjusted to provide a regulated voltage with very little voltage drop across it, while providing a low output impedance.

In addition to its linear regulator design, the AN78L08 also includes a short-circuit protection circuit. This circuit monitors the output of the regulator and shuts down the PNP transistor when the output voltage exceeds the set value. It also features a low dropout voltage feature that improves efficiency by reducing the amount of wasted power that would be otherwise dissipated in the power transistor.

The AN78L08 is an all-in-one power management IC, suitable for a variety of battery-powered applications. It is especially useful in portable electronic products that require an efficient and reliable power source. Its high current dual output capability makes it ideal for off-board power conditioning, while its programmable features and integrated protection circuits ensure the system’s integrity and reliability. The AN78L08 is an ideal choice for supplying power and energy to a variety of portable, battery-operated and robust electronic designs.

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