LP2985IM5X-2.0

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The LP2985IM5X-2.0 is a low-power, low-dropout linear regulator designed for portable and battery-powered applications. It is part of a family of very small-size, low-power linear voltage regulators from Texas Instruments. This regulator is a positive voltage regulator that offers excellent power supply stability, overcurrent protection, and low ground current.

The LP2985IM5X-2.0 is a three-terminal device with a wide input supply range, making it ideal for use in applications where input voltages are not precisely known or variable (such as battery-powered or portable applications). This device offers both adjustable and fixed output options ranging from 2.0V to 5.0V, easily allowing designers to quickly optimize their power supply design.

The device operates with input voltage up to 6.0V and a minimum dropout voltage of only 180mV at 150mA. With typical quiescent current of only 80µA at no load and output voltage of 5.0V, LP2985IM5X-2.0 is an ideal choice for portable applications. The device offers excellent temperature stability, low ripple and noise, and fast transient response to ensure the power supply stability under changing load conditions. Additionally, overload, thermal, and over-temperature protection are all integrated to safeguard the application from excessive power dissipation, as well as sudden fault conditions.

LP2985IM5X-2.0 has many applications in portable and battery-powered systems such as digital cameras, PDAs, cell phones and other handheld electronic devices. It can also be used in media players, audio systems, power splitter applications, or any application that requires a low-noise and stable power supply. Furthermore, the device offers several output options, allowing designers to achieve their desired output range while conserving board space.

The working principle of the LP2985IM5x-2.0 is fairly straightforward. The regulator consists of a voltage reference and an amplifier combined with an internal N-channel MOSFET pass transistor. The voltage reference is connected to the VIN pin and supplies voltage input to the regulator which then regulates the current to the output pin. The amplifier, in conjunction with the pass transistor, helps maintain a constant output current by adjusting the gate voltage on the pass transistor as the input voltage or load conditions fluctuate. This ensures the output voltage remains stable. Additionally, overcurrent protection prevents the device from exceeding a specified current output and thermal protection safely shuts down the device when it reaches a set temperature.

In summary, the LP2985IM5X-2.0 is a low-power, low-dropout linear regulator designed for portable and battery-powered applications. Its wide input supply range and adjustable output options make it perfect for applications where input voltages are not precisely known or fluctuate frequently. The device also offers excellent temperature stability and over-temperature protection, making it an ideal choice for meeting the needs of portable applications.

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