LP2985AIM5-4.5/NOPB

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The LP2985AIM5-4.5/NOPB is a Linear Voltage Regulator from the PMIC (Power Management IC) family. It is an efficient, low noise, low quiescent current regulator. The LP2985AIM5-4.5/NOPB is a low dropout, fixed output voltage, ultra-low-noise linear regulators that operate with maximum input voltage of up to 10V and output current of 2A.

The LP2985AIM5-4.5/NOPB is designed to provide clean regulated power to any application that requires a regulated supply voltage of 4.5V. The device is capable of regulating a wide variety of loads and is designed to be used in both general and power sensitive portable applications.

The LP2985AIM5-4.5/NOPB offers excellent power supply rejection ratio (PSRR), meaning that the output voltage remains very stable against input voltage fluctuations. It also provides excellent voltage accuracy and load transient response, as well as a low dropout voltage of 0.30V typical, making it ideal for portable applications.

The LP2985AIM5-4.5/NOPB is specifically designed for applications that require low noise and low power consumption. The device can be used in applications such as power management, battery management, communications and control, LED lighting, and consumer electronic products. It is available in the RoHS-compliant, compact, 8-pin MSOP package.

Working principle

The LP2985AIM5-4.5/NOPB voltage regulator works on the principle of linear voltage regulation. The output voltage of the device is set by the voltage divider formed by the two external resistors connected to the ADJ pin. The output voltage is also affected by the temperature and load current of the device.

The LP2985AIM5-4.5/NOPB uses an error amplifier to compare the voltage level at the internal reference voltage with the voltage at the output. The error amplifier produces a correction signal depending upon the output voltage and sends this signal to the pass transistor. Depending upon the signal, the pass transistor either allows more current or blocks the current flow and accordingly regulates the output voltage.

The LP2985AIM5-4.5/NOPB features fast line and load transient response, high PSRR, and low quiescent current of only 20uA. It has an adjustable output voltage range of 3.3V - 5V and an overload protection feature that is built into the Pass transistor which protects the output from over current and high temperature.

Advantages

The LP2985AIM5-4.5/NOPB voltage regulator offers several advantages for the user. It has ultra-low noise and quiescent current, high PSRR, low dropout voltage, and fast load transient response. It also has an overload protection feature built into the Pass transistor, which protects the output from over current and high temperature.

The LP2985AIM5-4.5/NOPB is specifically designed to deliver precise output voltage and current accuracy for battery-powered applications. As it is designed to operate with maximum input voltage of up to 10V and output current of 2A, it is highly suitable for battery-powered applications.

The LP2985AIM5-4.5/NOPB is available in a wide range of packages, including the small, 8-pin MSOP package, making it suitable for space-constrained applications. It is also available in the multipack version, which eliminates the need for multiple packages and optimizes the space required for installation.

Disadvantages

The LP2985AIM5-4.5/NOPB linear voltage regulator does have some drawbacks. First, it does not have an internal reset feature, which can result in the output voltage becoming unstable during power-up or power-down transitions. Second, the maximum output current is limited to 2A and cannot be increased with external components.

Finally, the LP2985AIM5-4.5/NOPB has a relatively high dropout voltage of 0.3 volts. This means that the input voltage must be significantly higher than the output voltage in order for the device to operate properly.

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