LP2951ACN-3.3

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The LP2951ACN-3.3 is a low-power, low-dropout, fixed output linear regulator. It is particularly suited for low input voltage applications where high voltage regulation is required. The device is available in SOT-223, SOT-89, DPAK, SOIC-8 and TO-92 packages, and is characterized for operation over the -40C to +125C temperature range. The LP2951ACN-3.3 has three main features: low dropout voltage, low input voltage and low power consumption, making it ideal for a variety of portable applications.

The LP2951ACN-3.3 provides a consistent 3.3V regulated output voltage from a wide input voltage range of 4.5V to 20V. Its low dropout voltage, typically 80mV at full rated load current, allows it to regulate output voltage with very low input voltage overhead. The LP2951ACN-3.3 also offers current limiting and thermal shutdown protection, ensuring the safety and stability of the application. It also has an enable pin, allowing the device to be enabled/disabled without having to cycle power.

The LP2951ACN-3.3 has a current limit of 1.0A and a thermal shutdown temperature of 135C. It has a maximum output voltage ripple of 5.6mV (at 20mA load current) and a maximum output current of 1A. The LP2951ACN-3.3 also features low quiescent current of 3mA (typical) for a minimum total power dissipation.

In terms of its working principle, the LP2951ACN-3.3 uses a series of transistors and resistors to convert an unregulated input voltage to a regulated output voltage. This is done by first amplifying the input voltage with a voltage reference transistor, then passing it through a pass transistor, and finally pro-rating the output voltage with a precision resistor divider. This technique enables the device to provide a regulated output voltage with excellent load and line regulation.

The LP2951ACN-3.3 can be used in a variety of applications, including personal electronics, power management, metering, and automotive systems. It is particularly suited for portable places where high voltage regulation and efficiency is required.

In conclusion, the LP2951ACN-3.3 is a highly efficient and reliable low-power, low-dropout, fixed output linear regulator, capable of regulating output voltage with very low input voltage overhead. This makes it ideal for low input voltage applications where high voltage regulation is required. With its low dropout voltage, low input voltage, low power consumption, and wide input voltage range, the LP2951ACN-3.3 is a great choice for a variety of portable applications.

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