ISL65426HRZ

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Power management integrated circuit (PMIC) is an electronic component used to manage and control the consumption of power in a system. PMICs can be divided into several different categories, including voltage regulators, DC-DC switching regulators, clock generators, voltage reference circuits, power gating and level shifters, to name a few. This article focuses on the ISL65426HRZ PMIC, defining its application fields and working principles.

Application Fields of ISL65426HRZ

The ISL65426HRZ is a single-phase synchronous buck regulator PMIC from Intersil. It is capable of providing up to 10A of output current with a switching frequency up to 1MHz. As such, it is well suited for applications where high current, low noise and low losses are required including systems such as high-end AV equipment, industrial systems, IT equipment, medical systems and more.

The ISL65426HRZ integrates the latest technologies with advanced features such as over-temperature and over-voltage protection, skip-mode operation, self-adjusting pre-bias operation and an external clock synchronization feature. Additionally, the device has a logic-controlled power-down mode which allows the device to be powered down during system standby, enabling power saving and low power consumption.

Working Principle of ISL65426HRZ

The ISL65426HRZ is a synchronous buck regulator PMIC, which uses a pair of MOSFETs in a synchronous rectification scheme to convert an input voltage from 5V to 24V into a regulated output voltage from 0.8V to 5V. It uses a current mode feedback control scheme to regulate the output voltage and ensure an optimal performance. The device also integrates safety features such as over-voltage and over-temperature protection.

The device has three main components: a power stage, a controller and a protection circuit. The power stage consists of two MOSFETs and operates in buck-mode which is when the input voltage is greater than the output voltage. The controller consists of a high-speed oscillator, a high-speed pulse width modulator and an error amplifier that ensures the output voltage remains at the target voltage. Lastly, the protection circuit ensures safety measurements such as over-voltage, over-temperature and over-current protection.

In conclusion, the ISL65426HRZ is a versatile power management integrated circuit (PMIC) for DC-DC switching applications. Its advanced features such as over-temperature and over-voltage protection, skip-mode operation, self-adjusting pre-bias operation and an external clock synchronization feature make it an ideal choice for a variety of applications. Its synchronous buck regulator design enables it to convert an input voltage from 5V to 24V into a regulated output voltage from 0.8V to 5V.

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