ISL9012IRKJZ-T

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The ISL9012IRKJZ-T is an integrated linear voltage regulator from Intersil Corporation. This device is designed to provide up to 1.8A of maximum output current in a very small 4mm x 4mm QFN footprint with excellent load and line regulation. It provides a precise and stable output voltage at a wide input voltage range in both continuous mode and in a variety of different transient requirements. This device is categorized as a PMIC voltage regulator, and here we will explore its application field and working principle.

Application Field

The ISL9012IRKJZ-T is ideally suited for a variety of portable and other power related applications. Due to its small footprint and excellent line and load regulation characteristics, it is the perfect choice for battery-based applications that require minimal energy consumption. Additionally, its wide input voltage range, high efficiency operation and thermal protection features make it suitable for a variety of electronic loads from small to large capacities, such as PDAs, digital cameras, cellphones, MP3 players, and hard disk drives. Furthermore, due to its low dropout voltage, it can be used for charger applications for both Li-ion and NiMH type batteries.

Working Principle

Traditional linear voltage regulators use an error amplifier to compare the voltage on the output side of the regulator to a reference voltage. This comparison results in the error amplifier to output an error signal that is proportional to the difference between the reference voltage and the output voltage. This error signal is then used to control the power transistor’s gate drive. In the case of the ISL9012IRKJZ-T, an internal high voltage power transistor and an error amplifier are integrated into a single IC. This provides the user with a simple and cost effective solution with no external components.The ISL9012IRKJZ-T is designed to provide stable output voltage in applications that require light load regulation. The device operates from a wide input voltage range from 3.2V to 24V. This is accomplished by sensing the input voltage and regulating the output voltage to a fixed setpoint. Additionally, it has a low dropout voltage of just 0.5V maximum, which helps ensure reliable operation in low voltage applications.The ISL9012IRKJZ-T also includes a current limit and thermal protection circuit. This helps ensure safe operation of the IC and prevents it from entering thermal runaway. This feature is especially beneficial in applications where the load current can vary significantly.The ISL9012IRKJZ-T is an excellent choice for a variety of applications requiring a low dropout linear voltage regulator. Its small size and wide input voltage range make it ideal for use in portable devices. Furthermore, it is capable of providing stable output voltage in both continuous mode and in a variety of different transient requirements. With its excellent line and load regulation characteristics, it can be used for a variety of power related applications, such as charger applications and battery-based applications.

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