ISL6327CRZ-T

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The ISL6327CRZ-T is a high-efficiency, dual-phase, synchronous buck regulator control IC from Renesas designed to enable smooth transitions between high- and low-current load conditions while keeping output voltages steady. It features a current-mode design and high-side and low-side MOSFET gate drivers to provide a cost-effective, efficient power solution. The ‘T’ suffix of the part suggests that it is rated for operating temperature of up to +105˚C.

The device is most suitable for a broad range of DC-DC applications including those in industrial, communications, computing and consumer applications. It offers the required feature-set to create a power supply design which is both reliable and highly efficient.

Application Areas
The ISL6327CRZ-T can found in a variety of applications such as:

• Telecommunications, industrials and networking systems
• Solid-state LED lighting systems
• High-efficiency power conversion systems
• Battery-powered devices
• Processor and memory core voltage regulation
• Portable device charging
• Embedded system core power regulation

Working Principle
The ISL6327CRZ-T is a single-chip synchronous buck controller IC designed to provide low noise and fast transient performance. The device uses a current-mode control topology which allows for a simple and accurate control loop with good transient response and fast loop compensation. The device also features adaptive dead time control which ensures that the pulse width is optimized for best efficiency and output power over the given load range.

The IC also includes protection features such as an over-current limit, an under-voltage lock out and a thermal shut down. These features ensure reliability and protection of the power circuitry in the event of any extremes conditions. Additionally, the device is optimized for low MOSFET gate-driving voltage and low quiescent current, enabling better efficiency and power usage.

The ISL6327CRZ-T comes in a small 10 Ld TDFN (2mmx2mm) package, making it suitable for space-constrained applications. It has an integrated 10-bit DAC for setting the output voltage which is programmable over a voltage range of 0.4V to 5.5V. The IC supports two-phase operation in order to reduce input ripple current and output voltage ripple. The device can support MOSFETs operating up to 40V and can provide up to 10A of output current.

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