LM2852XMXAX-2.5 Integrated Circuits (ICs)

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The LM2852XMXAX-2.5 is a power management integrated circuit (PMIC) specifically designed for applications such as portable electronic devices and embedded systems to provide for efficient voltage regulation. It is classified as belonging to the voltage regulators category of PMICs, and the particular type known in the industry as DC DC switching regulators.

A DC-DC converter is a circuit used to produce an output voltage that is different from the input voltage, for example, stepping down the input voltage to generate a lower output voltage. The LM2852XMXAX-2.5 is a buck regulator, meaning it converts a higher DC input voltage to a lower DC output voltage. It takes in a supply voltage of up to 28V and regulates it to output a voltage ranging from 5V to 25V.

The LM2852XMXAX-2.5 relies on the principles of inductor-based buck converters to provide its power regulation capabilities. Its output is regulated through combining the effects of the inductor and the internal MOSFET transistor. During the first half cycle of a switching cycle, the inductor accumulates energy by drawing current from the supply and stores it as an electric field. During the second half-cycle, the MOSFET transistor is turned on and current is provided to the output and the inductor discharges its stored energy to the output. This is achieved by routing the current from the inductor to the output through the MOSFET. The on/off duty cycle of the MOSFET is regulated in such a way that ensures that the output voltage stays within the desired range.

The LM2852XMXAX-2.5 operates in a pulse-width modulation (PWM) mode, meaning that the MOSFET is switched on and off in a manner that the width of the output pulses is varied in order to increase or decrease the average output voltage. The PWM width is controlled through analog or digital pulse-width modulation (PWM) control. The frequency of the switched waveform depends on the value of an external resistor and varies in the range of 150kHz to 900kHz. This operating frequency can be adjusted to match the requirements of the application or to reduce backing interference.

In addition to these features, the LM2852XMXAX-2.5 is designed to be thoroughly protected against many common electrical scenarios. It features short-circuit protection, thermal shutdown protection, over voltage protection, and programmable soft-start to prevent inrush current.

The LM2852XMXAX-2.5 has many applications including LAN switches and game console power, tablet and laptop power supplies, servers and PC power supplies, touch screen displays, and battery charger applications. It is an efficient and reliable solution for applications where a reliable and efficient buck regulator is needed. It offers a high switching frequency suitable for many portable applications, as well as a wide input supply range and over-voltage protection.

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