LP4951CM/NOPB

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The LP4951CM/NOPB is a linear voltage regulator from Texas Instruments that is designed to provide a low dropout, high output current and is capable of supplying up to 200mA of current without additional heat sinks. The LP4951CM/NOPB is a cost-effective solution for low input voltage requirements, is fully protected against output short circuits and thermal overload, and is stable with a variety of capacitance loads.

The LP4951CM/NOPB is a three-terminal positive voltage regulator with a wide input range of 5.5V to 32V. It features an adjustable output voltage range between 1.18V and 31.8V. It provides a variety of features such as a maximum output current of 200mA, thermal shutdown protection and a limited dropout voltage. The device has an internal current limit protection which senses output current and shuts down the device when the current exceeds the limit. It also has a reverse current protection, which prevents current from flowing in the reverse direction.

The LP4951CM/NOPB is primarily used in applications such as battery-powered systems, isolated DC-DC power accessories, point-of-load power supplies, and hot-swapping of microprocessor voltage rails. It can also be used in communications equipment, instrumentation, test systems, and audio/video applications.

The working principle of the LP4951CM/NOPB is as follows. The input voltage is regulated to a predetermined voltage by an internal error amplifier and precision reference voltage. The regulated voltage is then provided to the load through a power transistor. The power transistor adjusts its duty cycle to the control voltage which maintains the output voltage fed to the load. The output current is sensed through the power transistor and is then controlled through the error amplifier to regulate the output voltage.

The LP4951CM/NOPB is designed with several additional features such as thermal shutdown protection and soft-start. The thermal shutdown protection is triggered when the device\'s temperature reaches a certain threshold and the device shuts off until it cools down. This prevents possible damage from overheating and also helps reduce power dissipation. The soft-start feature helps reduce inrush current on startup and allows the device to slowly reach its regulated voltage. The device also features an enable pin which allows the user to control when the device is powered on and off.

Overall, the LP4951CM/NOPB is an excellent linear voltage regulator capable of supplying up to 200mA of current. It is reliable, cost effective and offers protection against output short circuits and thermal overload. Its wide input range and adjustable output voltage makes it a great choice for a variety of applications.

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