LM2852XMXA-2.5/NOPB

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LM2852XMXA-2.5/NOPB is a monolithic four-cycle DC/DC buck switching regulator with integrated power MOSFETS that is suitable for providing voltage conversion under tight conditions. It is designed to provide a regulated output voltage of 2.5V while operating from input voltages of 3.0V to 9.0V. This PMIC is targeted for the space-constrained portable applications in order to provide reduced power dissipation. The LM2852XMXA-2.5/NOPB has several features that give it an edge over other switching regulators. These features include:

-Added power efficiency: The LM2852XMXA-2.5/NOPB is designed with a high efficiency synchronous buck converter, minimizing power loss and power consumption due to the low on resistance transistors it contains.

-Input noise reduction: To reduce noise on the input supply, the LM2852XMXA-2.5/NOPB utilizes a high-frequency filter circuit that can filter noise on the supply voltage up to 8KHz. This helps to prevent interference with other components on the board.

-Adaptability: The LM2852XMXA-2.5/NOPB can be easily configured to provide a programmed output voltage of up to 2.5V, adjustable to +/- 5%. Its pulse frequency modulation (PFM) mode also allows the LM2852XMXA-2.5/NOPB to adjust its switching frequency in order to reduce switching losses at a light load.

-Protection features: The device is provided with under-voltage lockout, over-voltage protection, over-temperature protection, and cycle-by-cycle current protection to ensure the safety and reliability of its performance.

The LM2852XMXA-2.5/NOPB is designed to support a wide range of applications such as cellular phones, PDAs, MP3 players and other space-constrained handheld devices. Its low quiescent current, internal power MOSFETS, and low output ripple make it an ideal choice for efficient and reliable voltage conversion in such applications. The LM2852XMXA-2.5/NOPB is easy to use and requires only a few external components to complete the circuit. The LM2852XMXA-2.5/NOPB is available in a small 12-pin HTSSOP package, allowing it to be integrated into many applications with no additional space requirements.

Working Principle
The LM2852XMXA-2.5/NOPB is a two-phase synchronous buck converter. It works by drawing current from the input voltage, storing it in an inductor, and then releasing the energy stored in the inductor to the output voltage. During the “on” time, the switches connecting the input and the inductor are closed and the current starts to flow from the input to the inductor. During the “off” time, the switches are open, the current stored in the inductor is released to the output voltage, and the cycle repeats. The LM2852XMXA-2.5/NOPB also has a synchronous rectifier which reduces the voltage drop across the switch and increases the efficiency of the circuit.

By controlling the “on” and “off” times, the LM2852XMXA-2.5/NOPB is able to regulate the output voltage. This is done by varying the switching frequency which adjusts the “on” and “off” times accordingly. In order to provide the best possible output ripple, the LM2852XMXA-2.5/NOPB has an integrated error amplifier, allowing the converter to adjust its switching frequency automatically to maintain even ripple.Additionally, the LM2852XMXA-2.5/NOPB allows flexibility in the choice of input and output voltages, as well as the selection of the switching frequency. This makes it suitable for a wide range of applications including portable devices, automotive, and industrial applications.

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