ISL6423BERZ

Series:	--
Packaging:	Tube
Part Status:	Active
Applications:	Converter, Satellite Set-Top Box Designs
Voltage - Input:	8 V ~ 14 V
Number of Outputs:	1
Voltage - Output:	13.3 V ~ 18.3 V, 14.3 V ~ 19.3 V
Operating Temperature:	-20°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	24-VFQFN Exposed Pad
Supplier Device Package:	24-QFN-EP (4x4)
Base Part Number:	ISL6423

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ISL6423BERZ Application Field and Working Principle

ISL6423BERZ is a Voltage Regulator in the Special Purpose PMIC (Power Management Integrated Circuit) product family from Intersil. It is a three-phase synchronous, regulated buck controller that has been designed with current mode control and low-side MOSFET drivers for use in multi-phase voltage regulation applications.

Applications

The ISL6423BERZ is ideal for a variety of high-performance computing and consumer electronics applications such as mobile workstations, gaming systems and consumer audio power amplifier. It is designed to be used in DC/DC solutions powered by a wide range of voltages, and is capable of regulating output voltage through its built-in voltage regulation loop. With current-mode control and low-side MOSFET drivers, the ISL6423BERZ is also suitable for medium-powered systems requiring steady, small output current regulation.

Key Features

The ISL6423BERZ provides multi-phase control designed to drive three independent buck DC/DC regulators. It features:

• SeparateEnable, soft-start and current limit pins for each phase.
• Integrated differential remote sensing for each phase.
• High frequency operation up to 1MHz.
• Extendable multi-phase control for space constrained applications.
• Output voltage range: 0 - 10V.
• Adjustable switching frequency (480kHz to 1.2MHz).
• 0.6V reference voltage.
• Compatible with Intersil phase interleave feature.
• High temperature operation up to 125C.

Working Principle

The ISL6423BERZ integrated synchronous buck controller utilizes an internal oscillator and low-side MOSFET driver to provide voltage regulation. The three-phase synchronous buck controller is designed to operate multiple DC/DC converters in parallel, driving up to three synchronous buck regulators using a single integrated circuit. It features separate Control, Soft Start, and Current Limit pins for each phase. Synchronous rectification is enabled for each phase to reduce power dissipation and improve efficiency.The integrated voltage regulation loop regulates the output voltage by sensing the output voltage through separate differential remote sensing pins for each phase. The regulator is capable of providing a wide range of output voltage, from 0-10V. The maximum switching frequency is set through an external resistor at 480kHz to 1.2MHz and is adjustable. The ISL6423BERZ is powered by a 0.6V reference voltage and is compatible with Intersil\'s phase interleave feature. This device is also designed to operate at temperatures up to 125C.

Conclusion

The ISL6423BERZ is an integrated synchronous buck controller designed to operate multiple DC/DC converters in parallel, driving up to three synchronous buck regulators using a single integrated circuit. It features a current mode control, low-side MOSFET driver and a wide output voltage range of 0-10V, adjustable switching frequency up to 1.2MHz, adjustable voltage accuracy, remote differential sensing pins, Intersil’s phase interleave feature, and high temperature operation up to 125C. The ISL6423BERZ is ideal for a variety of medium-power applications such as mobile workstations, gaming systems and consumer audio power amplifier.

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