ISL6534CR

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ISL6534CR Application Field and Working Principle

The ISL6534CR is a dual output power management IC commonly used in microprocessor power systems. It is a multi-voltage, synchronous, high current step-down converter designed for battery-powered electronic systems. It belongs to the family of PMIC voltage regulator components, which specifically categorizes it as a linear and switching regulator. The main feature of this integration is to allow the switching of two +3.3V and +7V outputs without the need for additional switching components.

Applications

The ISL6534CR can be used in many applications such as LED backlighting, micro-controllers, power systems, and telecom infrastructure systems. Its integration of two high efficiency step-down converters makes it suitable for many power solutions. The ISL6534CR can switch at 4A draw current limit, which is suitable for low-power and small form factor applications. It is also a fully integrated IC which allows for greater power density compared to discrete solutions.

Working Principle

At a high level, the ISL6534CR operates by receiving a voltage at its inputs and producing a regulated low-voltage output at its outputs. The chip contains two power regulator level shifters which allow it to achieve higher current output and increased voltage flexibility. When the chip is powered up, it starts by monitoring the voltage at its inputs, and then begins switching between its high-side and low-side switching FETs in order to convert the input voltage into the desired output voltage. This is done by a PWM control loop which operates at a frequency of 500kHz. Once the PWM output is synchronized with the input clock, the chip is able to regulate the output voltage within a predetermined range.

Conclusion

The ISL6534CR is a multi-voltage, synchronous, high current step-down converter designed for battery-powered electronic systems. It is commonly used in microprocessor power systems and is classified as a linear and switching regulator in the family of PMIC voltage regulators. The integration of two high efficiency power regulators makes it suitable for many different power solutions, and its fully integrated design allows for increased power density compared to discrete solutions. It works by receiving a voltage at its inputs and produces a regulated low-voltage output at its outputs, which is achieved by a PWM control loop and synchronized with the input clock.

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