IRU3138CSTRPBF

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IRU3138CSTRPBF is a DC DC switching controller with excellent performance. It is suitable for an application range of 5Vand up to 24Vinputs and outputs regulated to 1.0V to 1.8V. It also features an ultra-fast transient response, making it ideal for applications which require fast loading steps. The controller provides a low RDSon switch, allowing the highest efficiency to be achieved while the peak current is limited by a Selectable Maximum Current Limit.

It is available in surface mount and through-hole packages and is configured using the control pin and the function pins. The maximum output power is up to 45 Watts at a 12V input, and adjustable switching frequencies from 400 kHz to 1 MHz.

The IRU3138CSTRPBF controller is designed for synchronous buck converter applications, such as high-efficiency DC to DC power conversion. It has advanced features such as an active voltage positioner (AVP) which ensures the output voltage always stays within a precise voltage range. This feature is ideal for monitoring critical functions in the system, such as fan speed or temperature.

Another key feature is the Constant On-Time (COT) control architecture which provides fast response to transient changes and eliminates the need for compensation components. The IRU3138CSTRPBF also includes integrated fault protection with adjustable thresholds, as well as Over-Voltage and Over-Temperature protection.

The IRU3138CSTRPBF is an ideal choice for fast and reliable performance in DC to DC power conversion systems. It is efficient, flexible, and has advanced features making it suitable for a wide range of applications.

The working principle of the IRU3138CSTRPBF is based on the pulse width modulation (PWM) technique. The power output from the converter is controlled by varying the duty cycle, or the time the switch is in the “on” position, of the applied switching waveform. This PWM signal is regulated by the control pin which adjusts the pulse width. The main switch is then driven by a synchronous MOSFET which controls the transfer of power from the input to the output side.

When the input voltage is greater than the output voltage, the switch is set to the “on” position, and power is transferred from the input to the output capacitor. When the output voltage is greater than the input, the switch is set to the "off" position, thus preventing power from flowing in the opposite direction and more importantly, protecting the converter from over-voltage conditions.

The IRU3138CSTRPBF controller is also featured with a low standby power consumption and high efficiency due to the low switching losses and active voltage positioner (AVP) feature. The AVP enables the output voltage to be monitored and adjusted automatically in order to maintain precise output voltage control. It also helps to minimize output voltage ripple and improve dynamic load stability.

In conclusion, the IRU3138CSTRPBF switching controller is a highly reliable and efficient DC to DC converter solution for applications requiring fast loading steps and precise voltage regulation. Its advanced features such as the active voltage positioner and the constant on-time control architecture provide fast dynamic response and precise output voltage control respectively. This makes it an ideal choice for high-efficiency power conversion systems.

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