ISL6326IRZ-T

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The ISL6326IRZ-T is an optimal voltage regulator from the extensive range of DC-DC switching controllers from Intersil. It is designed to provide integrated support for power-critical processor cores, peripherals, and memory in space-constrained mobile applications. The device features a buck topology with a constant on-time control architecture and can support up to 2A output current. It also supports low to high voltage conversions and has an integrated fast-charge pump for higher input voltages and a current-limit option for output protection.

The ISL6326IRZ-T is optimized for space-constrained designs, which makes it well suited for products used in mobile applications such as notebooks, tablets, smartphones, and more. The board includes a spread spectrum frequency modulation (FSM) option which reduces EMI output, and a programmable switching frequency of 200 kHz to 1.2 MHz. Additionally, it has adjustable soft-start and thermal shutdown features for added protection.

OPERATING PRINCIPLE: The ISL6326IRZ-T voltage regulator is based on a constant on-time control architecture. The device uses the integrated fast-charge pump to provide higher output current than a standard buck regulator. It includes an adjustable transient voltage suppressor which reduces output voltage oscillations at high frequencies. The on-time is adjusted by an internal ramp generator, making the on/off time insensitive to temperature and supply voltage.

The device constantly monitors the output voltage and adjusts the on/off timing ratios to maintain the desired output voltage. The integrated current limit circuit helps protect the system against over-current events. Once the output current reaches the programmed limit, the pulse width modulation (PWM) controller is shut off, and the output voltage drops until the current drops below the limit. This helps ensure reliable operation.

TECHNICAL SPECIFICATIONS: The ISL6326IRZ-T voltage regulator supports a wide input voltage range, from 2.4V to 5.5V. The output voltage is adjustable from 0.8V to 4.5V, with a maximum output current of 2A, depending on the input voltage. The board also features a 1.2MHz adjustable fixed frequency, programmable pulse-width modulation ratio, and adjustable soft-start and thermal shutdown. Other features include an over-voltage and an over-temperature protection.

APPLICATION FIELD: The ISL6326IRZ-T voltage regulator is primarily used in mobile device designs where power consumption and miniaturization are critical. Mobile applications such as notebooks, tablets, smartphones, and portable medical devices benefit from the device\'s performance and its highly integrated feature set. It is also widely used in embedded systems, microcontrollers, and peripheral controllers, where output voltage accuracy, current limit protection, and high efficiency are of utmost importance.

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