ISL6269BCRZ

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The ISL6269BCRZ is a switching regulator controller designed and manufactured by Intersil. The device is a high-efficiency, synchronous buck converter some features, including precision voltage regulation, excellent line and load transient response and adjustable switching frequency. By using Intersil’s MOSFET driver technology, this IC is able to achieve up to 95% efficiency. The device is suitable for high current, step-down applications.

Application Field

The ISL6269BCRZ is intended for a wide variety of applications, such as high current, wide input voltage range DC/DC converters, cost and size plusmized swithching dc/dc and voltage regulators. It is an efficient, cost-effective and power-saving alternative to linear regulators in a large number of DC-DC converter applications and it is suitable for portable equipment (especially the DC output needs to be large current) such as notebook computers, mobile phones and digital cameras.

Working Principle

The ISL6269BCRZ is a synchronous buck controller that can be used in a variety of applications. The device is able to provide high efficiency power conversion. The device is using a pulse-width modulation (PWM) technique to regulate the output voltage. The device is using a switching frequency of 300kHz and provides a high level of accuracy for the output voltage.

The working principle is to have a switching transistor acting as a main component. The main component switches on and off according to the feedback from a voltage reference and the voltage sense resistor. The switching transistor controls the loading current of the power supply. When the device is in the on state, the voltage is applied to the load and the current fed trough the transistor. When the device is in the off state, the transistor is switched off so that it disconnects the load from the power supply, thus reducing the loading current.The current flowing through the power supply is calculated by the voltage reference and the voltage sense resistor. The voltage reference provides a stable reference voltage and the voltage sense resistor provides the resolver feedback. This combination of the two components gives the device the ability to provide a precise output voltage.

The device is also provided with an internal over-current protection circuit.This feature ensures that the current drawn from the power supply is kept within the proper limits. The device also includes thermal protection which prevents overheating of the component.

The ISL6269BCRZ is an excellent solution for power conversion applications because it offers exceptional power conversion efficiency and is a highly effective way to reduce the cost and size of power supply design.

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