UC3525AN

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The UC3525AN is a Pulse Width Modulated (PWM) voltage regulator and DC DC switching controller integrated circuit manufactured by Microchip Technology. It is designed to provide the necessary control and protection for DC power supplies, and to convert input AC power into a regulated DC output voltage. The UC3525AN is a low-cost, peak-current-mode, monolithic Pulse Width Modulated (PWM) voltage regulator capable of producing a regulated DC output of up to 100 MHz, with low quiescent current, high efficiency, and low parts count. It also offers a range of features such as a built-in soft-start, thermal shut-down protection, adjustable switching frequency and over current protection.

The UC3525AN functions as a voltage regulator and DC to DC switching controller. It is capable of converting both AC and DC input power into regulated DC output voltage. The output voltage is established by the voltage divider network on the pins VREF and FB, with VREF set by the internal 7.5 V reference voltage. The PWM controllers includes an oscillator, current sensing, MOSFET drivers, error amplifier, and other features that make it suitable for use in a variety of DC power supply types, such as: linear, switching and non-isolated DC/DC converters, dimmable LED driver applications, and multiple output distributions.

The UC3525AN supports an internal soft start feature which allows for a gradual rise in the output voltage and prevents the sudden application of heavy loads. It also includes a thermal shutdown protection feature which protects the device and power supply from over temperature conditions. The UC3525AN has an adjustable switching frequency of between 100 kHz and 1 MHz, allowing for optimized efficiency in the power supply design.

The UC3525AN is a low-cost, feature-rich PWM voltage regulator and DC to DC switching controller, capable of efficiently converting AC or DC input power into regulated DC output voltage. Its unique features make it well suited for many applications including power supplies, dimmable LED drivers, and multiple output distributions. Its high efficiency, soft start, and thermal shutdown protection features make it an excellent solution for a variety of DC power system requirements.

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