LM3488MM

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LM3488MM is a DC/DC switching controller designed specifically for Power Management Integrated Circuits (PMIC). It is especially suitable for point-of-load (POL) power conversion such as non-isolated buck and buck boost applications. In these applications, it offers the benefits of a high efficiency, low parts count and superior reliability with an all-in-one integrated solution.

The LM3488MM is a high voltage monolithic integrated circuit capable of converting input supply voltages of up to 20V to output voltages as low as 0.9V. The high accuracy and fast transient response of the LM3488MM facilitates the design of power supplies for a wide range of applications that require tight output voltage regulation and power isolation.

The main feature of the LM3488MM is its integrated high voltage MOSFET and switching logic. This allows the device to handle input voltages up to 20V and deliver output voltages as low as 0.9V, making it particularly suitable for point-of-load (POL) applications where low-voltage regulation and high-current conversions are required. The integrated logic control also drastically reduces the parts count and complexity of the design, ensuring better cost-effectiveness, space savings, and higher reliability.

The working principle of the LM3488MM is based on pulse width modulation (PWM) techniques. The controller compares the output voltage with a fixed reference voltage and adjusts the duty cycle of the output current to maintain the desired load regulation accuracy. This constant output voltage regulation ensures that the output voltage remains within a specified tolerance. The controller also includes a fixed frequency oscillator for generating an external sawtooth waveform for applications such as buck and buck-boost converters.

The LM3488MM is well suited for use with a variety of loads, including microprocessors, DRAMs, ASICs, and FPGAs. Its features and performance make it an ideal choice for a wide range of power supply applications. Additionally, it provides superior transient response (such as output voltage overshoot and undershoot) due to its fast switching response time. This makes it well suited for applications where low-voltage, high-current conversion is required. The device is also RoHS compliant, making it attractive to designers that need to comply with strict environmental regulations.

In conclusion, the LM3488MM is a versatile DC/DC switching controller with excellent accuracy, fast transient response, and low-power dissipation. It is an ideal choice for applications requiring tight output voltage regulation, power isolation, and low parts count. The device is easy to use, RoHS compliant, and well suited for a variety of loads and applications.

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