IRU1240CSTR

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The IRU1240CSTR is a step-down regulator from Advantech Semiconductor that is suitable for a variety of power management applications. The device is built around optimized MOSFETs and integrates high-side and low-side driver to reduce external components while providing high efficiency, fast transient response and a low quiescent current.

The device offers two output voltage levels, an adjustable output voltage, and an adjustable soft-start feature. The device can also be set to operate in a pulse-skipping or in a forced-mode PWM configuration. For single output applications, the IRU1240CSTR is a two-phase SR+ regulator.

The IRU1240CSTR is ideal for applications requiring synchronous rectification solutions, such as USB Type-C/PD, Bluetooth applications, CPU and GPU power solutions, USB-OTG solutions, and other space-restricted applications.

The IRU1240CSTR is a DC-DC switching regulator, specifically a step-down regulator. It uses a high-frequency switching circuit to convert one DC voltage level to another. This type of regulator is very efficient in its power conversion and is able to provide very accurate output voltages. The frequency at which the device switches is controlled by an external resistor or a voltage source connected to its Soft-start pin.

The IRU1240CSTR is designed to produce a regulated voltage output at a current up to 1.2A, with input voltage ranging from 4.5V to 36V. The output voltage is adjustable, with a range of 0.6V up to the input voltage, and features a 0.8% accuracy over line and temperature. A soft-start pin is also available to control the inrush current.

The device includes a synchronous rectification feature for improved light load efficiency, using a pair of optimized MOSFETs for switching the high-side and low-side of the output voltage. A high sampling frequency is implemented to ensure fast transient response, minimizing overshoot and undershoot during a load step. This minimizes undesired output noise due to large and fast load changes. The ultra-low quiescent current and high efficiency makes the device suitable for battery-powered applications.

The IRU1240CSTR also offers a comprehensive set of protection features, including over-current, over-voltage, over-temperature protection and short-circuit protection. The device is housed in a 12-pin 3mmx4mm LFCSP (Low-profile Quad Flat No-Lead) package, making it suitable for space-restricted applications.

In summary, the IRU1240CSTR from Advantech Semiconductor is a highly integrated DC-DC switching regulator suitable for a variety of power management applications. It provides adjustable output voltage, high efficiency, fast transient response and comprehensive protection features, making it an ideal choice for battery-powered and space-restricted applications.

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