AP1186K5-15L-U

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AP1186K5-15L-U Application Field and Working Principle

PMIC (Power Management Integrated Circuit) is an integrated circuit device that manages power distribution and voltage regulation. When an IC consumes or produces power, PMIC is usually used to ease the current load and help the IC perform better. PMIC can also be used to maximize power efficiency and help reduce power consumption. Voltage Regulators are one type of PMIC which are used to regulate the voltage i n a power system.

Linear voltage regulators, such as the AP1186K5-15L-U, are used to provide a constant and stable output voltage from a varying input voltage source. This type of voltage regulator works by using a controlling element that senses and regulates the output voltage by controlling the amount of current that passes through a resistor network and then is converted to provide the desired output voltage level. This type of voltage regulator is, in principle, very simple and thus remains one of the most commonly used and cost effective ways to regulate voltage for many applications.

AP1186K5-15L-U Application Field

The AP1186K5-15L-U is a monolithic voltage regulator specifically designed to accurately regulate output voltages of 5.0V~15.0V. The device features a low dropout voltage, excellent line and load regulation, low temperature coefficient, as well as very low quiescent current, all suitable for a wide range of applications.

The AP1186K5-15L-U is suitable for use in a variety of electronic systems and applications such as power management of logic circuits, voltage regulation and controlling of mobile phone from battery, low power RF transceiver applications, DC-DC converter regulation, notebook computers, industrial and medical applications, wireless LAN or HSDPA communication systems, and many other applications.

AP1186K5-15L-U Working Principle

The AP1186K5-15L-U is a three-terminal linear voltage regulator that provides a regulated output voltage that remains constant over a wide range of input voltage variations and load current changes. The device consists of an error amplifier, a pass device, and a bandgap reference.

When powered and enabled, the device is active and regulates the output voltage. The Error Amplifier\'s input pin (Pin 1) is connected to the output pin (Pin 2) and an internal reference voltage via resistors, allowing it to regulate the output voltage by comparing the output voltage with the reference voltage. The Error Amplifier provides an output that is sensed by the Pass device (connected to Pin 3). When the output voltage is not up to the reference voltage, the error amplifier will drive the Gate of the Pass device, enabling the device to pass current from input to output, thereby raising the output voltage until the reference voltage is achieved. This is the principle behind linear voltage regulation.

The AP1186K5-15L-U also features a shutdown mode (Pin 4) which, when set to GND, forces the device into a low current or standby mode. A logic high on the shutdown pin will disable the error amplifier while the pass device is enabled, effectively disabling the device while still providing a low output impedance.

Conclusion

The AP1186K5-15L-U is a monolithic voltage regulator designed to deliver a constant output voltage. Its low dropout voltage, excellent line and load regulation, and low temperature coefficient make it ideal for a wide range of power management applications. Its low quiescent current and logic shutdown feature also make it suitable for portable and stand-by electronics. The device works on the principle of linear voltage regulation, using an error amplifier to compare an internal reference voltage with the output voltage and driving the Pass device until the set reference voltage is achieved.

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