LM2852XMXAX-3.0

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LM2852XMXAX-3.0 is a powerful DC/DC switching regulator in the field of PMIC (Power Management IC) voltage regulators. It is designed to deliver highly efficient power conversion, with low standby power, for applications requiring a wide range of output voltages, such as notebook computer and cellular phone power management.

The LM2852XMXAX-3.0 integrates the main controls and functions necessary for a low power system design, such as multiple overvoltage, current and temperature protections. It offers a wide input voltage range (2.5V to 6V), and provides regulated output voltages ranging from 0.8V to 6V, depending on external components. The device also features high switching frequency (up to 5.5MHz), which can deliver low output ripple noise, as well as programmable current limit for reduced component count and PCB area. It provides complete fault protection, including output short-circuit, input undervoltage, overvoltage, overcurrent, overtemperature and a soft-start/power-on reset circuit.

Working Principle

LM2852XMXAX-3.0 is a high efficiency, wide input range DC/DC switching regulator. It belongs to the “non-isolated buck topology”, which is a type of switching regulator where the input and output sides of the regulator share a common ground. It works by using a series of power switches to control the flow of current in the circuit. The switch is opened and closed at a specific duty cycle to transform the input voltage to an output voltage, while maintaining the same load current.

The LM2852XMXAX-3.0 is a high frequency synchronous buck regulator, which means that it employs a synchronous rectification control scheme to achieve higher efficiency compared to non-synchronous rectification. The buck operation is controlled by pulse-width modulation (PWM), where a higher switching frequency results in lower output ripple and better noise filtering. The device performs inductor current sensing to achieve fast current limit protection, and uses external transistor to provide current limit protection for the output stage.

The LM2852XMXAX-3.0 offers a wide range of features and protections, such as an adjustable (0.8V-6V) regulated output voltage and programmable current limit, as well as multiple overvoltage, current and temperature protection. It also contains a built-in soft-start circuit, which gradually increases the output voltage to its set value upon power-on, to reduce inrush current and output voltage transients.

Applications

The LM2852XMXAX-3.0 is suitable for a wide range of power management applications, including notebook computer and cellular phone power management applications. It is an ideal choice for applications where high efficiency and low standby power are required.

The LM2852XMXAX-3.0 is an advanced DC/DC regulator, offering features such as high efficiency, wide input voltage range, low output ripple and noise, adjustable output voltage, programmable current limit, overvoltage, current and temperature protection, and soft-start/power-on reset. These features make it suitable for a wide range of applications, including notebook computer and cellular phone power management.

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