BA17805CP-E2

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The BA17805CP-E2, a linear voltage regulator, is a high-performance integrated circuit for three-terminal voltage regulators (3-pins). It is constructed using a Bipolar NPN transistor, and includes a built-in pass element and error amplifier circuit, as well as a reference voltage circuit and temperature compensation circuit. Its output voltage can range from 1.8 V to 32 V, and its temperature range is -40 to 125 degrees Celsius. It is able to offer up to 0.85A of output current. Moreover, it achieves a low dropout voltage of 300 mV at 0.85A load current in continuous operation.

The main application fields of the BA17805CP-E2 are such as notebooks, car audio, automotive systems, data communication, portable equipment, hard disk drives, printers, TVs and other consumer electronic products. It is suitable for low-power on-board point-of-load (POL) and system power supply applications. It also has very good performance in a wide range of voltage accuracy, current limit protection and temperature compensation.

The working principle of the BA17805CP-E2 is based on the mechanism of a linear voltage regulator. In the 3-pin linear voltage regulator, the fixed voltage reference is the base voltage which provides the necessary reference voltage to compare the input voltage with the internal reference voltage. The voltage error between the input and the reference is amplified by the internal error amplifier and then output to the pass element, allowing output current to be raised or lowered accordingly. The combination of the output current and the input voltage provides the controlled voltage output.

The output voltage is controlled by the intrinsic feedback loop of the 3-pin linear voltage regulator. When the output voltage is lower than the reference voltage, the error amplifier produces a higher voltage output that is fed to the pass element, which allows the output current to increase, thus increasing the output voltage. Conversely, if the output voltage is higher than the reference voltage, the error amplifier produces a lower voltage output that is fed to the pass element, leading the output current to decrease, thus decreasing the output voltage.

The BA17805CP-E2 also provides current limit protection and reference voltage accuracy via the internal error amplifier and current limit circuitry. In case the output load increases beyond its capabilities, the current limit circuit will limit the output current and protect the device from short-circuit damage. The internal reference voltage accuracy compensates temperature-induced errors, providing a stable output voltage as the temperature changes.

In conclusion, the BA17805CP-E2, a linear voltage regulator, is a high-performance integrated circuit, suitable for low-power on-board point-of-load (POL) and system power supply applications. It is able to offer up to 0.85A of output current and achieves a low dropout voltage of 300 mV at 0.85A load current in continuous operation. Its main application fields are such as notebooks, car audio, automotive systems, data communication, portable equipment, hard disk drives, printers, TVs and other consumer electronic products. It also provides current limit protection and reference voltage accuracy via the internal error amplifier and current limit circuitry. Overall, the BA17805CP-E2 is an ideal choice for a wide range of linear voltage regulator applications.

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