LP3985IM5-3.1/NOPB

The LP3985IM5-3.1/NOPB is a low-noise, low-dropout linear regulator from Texas Instruments. It achieves high accuracy and low noise performance with a single-inductor buck-boost converter. This low-profile device offers a wide range of applications including battery-powered systems, linear supplies, and automotive systems.

This Linear Voltage Regulator boasts a small package size of just 9-pin SOT-383, and offers a low operational current of just 20µA (typical), allowing for greater efficiency in design. It also has an input voltage range from 2.3V to 18V, and offers both fixed and adjustable output voltage options (3.3V and 5.0V respectively). The device also features low quiescent current, low-dropout voltage, excellent accuracy, and fast transient response.

LP3985IM5-3.1/NOPB offers both overload protection and thermal overload protection. The overload protection prevents output voltage from dropping below its predetermined value in the event of an overload condition, while the thermal protection limits the device\'s temperature rise in the same circumstance. It also features reverse-battery protection which automatically shuts down the output when the battery voltage falls below a certain threshold.

The working principle of the LP3985IM5-3.1/NOPB begins with an input voltage being connected to the device. This voltage is then regulated via a MOSFET switch connected between the input and output. The MOSFET is driven by a low-dropout voltage regulator which acts as an accurate current source, providing precise and stable output voltages. The current source provides minimal losses and excellent noise immunity, allowing for superior accuracy and greater efficiency.

To take advantage of the low-dropout performance, the LP3985IM5-3.1/NOPB is equipped with a power management circuit to adjust its output voltage depending on the available input voltage. The device also features short-circuit and over-current protection, making it an ideal choice for both portable and industrial applications.

The LP3985IM5-3.1/NOPB is an excellent low-dropout linear regulator suitable for a range of applications. Its ultra-low-dropout voltage allows for greater efficiency, while its high accuracy and fast transient response makes it ideal for precision applications. Its low-profile package size makes it perfect for space-constrained designs, and its overload and thermal protection make it a perfect choice for commercial and industrial applications.