ISL6247CRZ

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The ISL6247CRZ is a non-synchronous step-down switching controller with an adjustable current, frequency and voltage droop. It is designed to provide pin-selectable operating frequencies, adjustable on-time and an adjustable voltage droop to optimize the synchronization of multiple ISL6247CRZ controllers. It is classified as a PMIC – Voltage Regulators – DC DC Switching Controller, and it is best suitable for applications where the power stage needs to be synchronous with itself, or with multiple similar controllers.

The ISL6247CRZ offers excellent power efficiencies, with an adjustable voltage droop and a current mode for greater accuracy in current sharing across multiple power stages. Furthermore, it includes an adjustable PWM frequency which provides linear scaling with current and frequency. The ISL6247CRZ also features an adjustable sink output voltage, as well as a dedicated synchronization pin to ensure the multiple controllers are synced together.

The primary application field of the ISL6247CRZ is telecom, datacom and industrial applications such as microprocessor cores, FPGAs and ASICs. The flexible control of its various functions such as frequency synchronization, adjustable current and adjustable sink output voltage makes the ISL6247CRZ ideal for applications where multiple power stages must be synchronized with one another. It can also be used as a replacement for competitive Silicon Carbide (SiC) devices, which are often used to reduce total cost of ownership.

In terms of its working principle, the ISL6247CRZ works by using a current-mode converter design to produce a regulated output voltage from its input. Input voltage is converted to an adjustable output voltage for the load through a pulse width modulation (PWM) switching action. When the input voltage rises above the output voltage, the PWM switches on, charging up an output capacitor, which then supplies the load with a constant, regulated output voltage. When the input voltage is lower than the output voltage, the PWM switches off and the output capacitor discharges thus maintaining the load voltage.

In addition, the ISL6247CRZ features open loop current mode to regulate the switch current, allowing for accurate and reliable current sharing across power stages with merely two resistors. The ISL6247CRZ also includes an adjustable PWM frequency that provides linear scaling with current and frequency, making it well suited for low frequencies with low input current ripple.

Overall, the ISL6247CRZ is a step-down switching controller provides outstanding features such as adjustable current, voltage droop and frequency, as well as synchronization, making it an ideal choice for applications where multiple power stages must be synchronized with one another. It is designed to offer both superior efficiency and greater accuracy in current sharing. Furthermore, its adjustable PWM frequency makes it excellent for low input current ripple at low frequencies.

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