LP2985AIBP-2.8

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LP2985AIBP-2.8 Application Field and Working Principle

The LP2985AIBP-2.8 is a low-noise, low-dropout linear voltage regulator (LDO) designed for power-sensitive applications in a variety of space-constrained end products.

LP2985AIBP-2.8 is an LDO voltage regulator that provides up to 1.5A of output current. It is capable of supplying 3.3V or 5V from a single input supply. The device is specified for operation from 2.7V to 5.5V input voltage and a dropout voltage of 300mV. It is stably biased with a quiescent current of only 5μA when no load is applied. It also offers a high PSRR of 63dB for 3V inputs, a wide operating temperature range from -40°C to 125°C, and a low noise output voltage of only 60μVRMS from 0.1Hz to 10Hz.

LP2985AIBP-2.8 voltage regulator is classified as PMIC (Power Management Integrated Circuit), Voltage Regulator, and Linear Voltage Regulator. It is specifically used in a wide range of applications, especially in mobile phones, tablets, and battery-powered circuits. Such applications include USB power ports, portable test equipment, STB (set-top-box), portable game consoles, and other products with limited power consumption and sensitive to noise.

The basic operating principle of the LP2985AIBP-2.8 is as follows: The differential amplifier senses the difference between the output and adjust pins, amplified by the error amplifier and then compensated by the loop filter. The output of the error amplifier is used as the pulse-width modulation (PWM) signal that is then fed to the integrated transistor switch of the device. The integrated switch then controls the voltage output based on the PWM signal. The integrated feedback network of the device provides the output voltage setting and current limit settings.

The LP2985AIBP-2.8 offers an adjustable output voltage range of 1.2V to 25V and delivers up to 1.5A of output current. It has an over-temperature protection feature, to ensure safe and reliable operation in high temperature applications; as well as an overtemperature shutdown of the device, which helps extend the battery life and improve overall system performance. Furthermore, the device has an over-current protection that helps protect the device from current overloads and a power good indicator that can be used to indicate the status of the voltage output.

The LP2985AIBP-2.8 is an ideal solution for providing regulated output voltage in power-sensitive applications needing high performance in a small form factor. With its features and capabilities, it is the perfect choice for applications that require high efficiency and noise-free operation. Additionally, it is highly reliable due to its advanced circuit design and integrated protection features, making it ideal for a wide range of applications.

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