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PMIC - Voltage Regulators - Special Purpose

The ISL6556ACB-T is a high-performance step-down converter from Intersil that offers many versatile features, including the ability to support a wide input voltage range from 1.1 V to 18 V. The device has a maximum output current of 10 A and a 4.5 MHz switching frequency. The converter also offers a wide range of adjustable output voltages that can be programmed down to 0.6 V. The converter also offers an adjustable soft start time and an Adjustable Frequency Mode that allows users to set the switching frequency from 200 kHz to 4.5 MHz.

The ISL6556ACB-T features a wide operating temperature range of –40°C to +125°C, making it suitable for a variety of applications. Also, the converter has many integrated protection features, including thermal shutdown, cycle-by-cycle over-current protection, and short-circuit protection. Moreover, the device features overvoltage shutdown, discrete On and Enable pins, and a fault delay pin that can be used to reset the output voltage when it is out of regulation.

Applications

The ISL6556ACB-T is a high-performance step-down converter that offers many versatile features, making it suitable for a wide range of applications. The device can be used for powering CPUs, GPUs and other types of processors, point-of-load supplies, automotive and industrial applications, backup power supplies and more. The adjustable output voltage and the wide input voltage range from 1.1 V to 18 V make it suitable for a variety of applications.

Working Principle

The ISL6556ACB-T utilizes a synchronous rectification technique to achieve higher efficiency. The device uses two power MOSFETs and a single-inductor step-down topology. The device consists of an internal PWM controller which regulates the output voltage. The two integrated switches are used to control the output voltage of the converter. The input voltage is applied to the input capacitors and then to the current-sense resistor. The PWM controller senses the voltage on the current-sense resistor and regulates the MOSFETs to regulate the output voltage. The device also features an adjustable soft-start time to prevent inrush currents.

The ISL6556ACB-T also includes integrated protection features such as soft-start, over-current protection and over-voltage protection. To protect the components from thermal overload, the device has a thermal shutdown feature, which shuts down the device when the junction temperature reaches a certain level. In addition, the device also has a fault delay pin, which can be used to reset the output voltage when it is out of regulation.

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