ISL6420AIRZ-TKR5264

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Introduction:

The ISL6420AIRZ-TKR5264 is an integrated switching regulator controller designed for DC-DC buck and step-down applications. It features a 1 to 6 A internal power switch, over-temperature protection, and an under-voltage lockout (UVLO) circuit to prevent erratic operation of the regulated system at start up and during fault conditions. The device also provides protection from reverse current, auto-restart protection, and a low-temperature start up circuit. The ISL6420AIRZ-TKR5264 can handle up to 8 A, and can be configured for either single synchronous rectifier operation or dual synchronous rectifier for higher efficiency applications.

Application field:

The ISL6420AIRZ-TKR5264 is typically used in notebook and other portable computers that require high efficiency voltage regulation, as well as conventional desktop computers, servers and telecommunications equipment. The device is also suitable for applications in medical devices and automotive applications where tight efficiency and high load current are required.

Working Principle:

The ISL6420AIRZ-TKR5264 DC-DC controller uses a buck and boost topology to provide a regulated output voltage. In a buck topology, the input voltage is regulated through a low side and high side MOSFET switch that provides a regulated output voltage at the output. At the same time, the high side and low side MOSFETs are regulated by the voltage on the feedback pin. In a boost topology, the input voltage is regulated by only a high side MOSFET switch, with the output voltage regulated at the feedback pin. In both topologies, a pulse width modulation (PWM) modulator is used to regulate the output voltage. The PWM modulator also takes into account the UVLO, over-temperature protection, current limit, and other system-level parameters.

Conclusion:

The ISL6420AIRZ-TKR5264 is a versatile DC-DC regulator controller designed for high efficiency and high load current applications. This device features advanced features such as high side and low side MOSFET switching, peak current mode control, low-temperature start up, auto-restart protection and over-temperature protection. With its high efficiency and protection features, the ISL6420AIRZ-TKR5264 is suitable for multiple applications such as notebook computing, telecom and automotive power management.

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