ISL6531CB

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The ISL6531CB is a special purpose charge pump voltage converter designed for efficient voltage conversion requirements in portable applications such as mobile phones, battery powered instruments, and other low power computing systems. It has an ability to run up to 2.6MHz from an input voltage range of 1.8V to 5.5V and can deliver over 1A with a typical 2.8V output voltage. The converter consists of three stages and minimizes components while providing good efficiency, which helps to reduce the converter power losses. In order to minimize power losses and optimize efficiency, the device includes a high efficiency and low noise charge pump and a high frequency clock.

The charge pump, typically referred to as a type-C converter, is ideally suited to applications needing high efficiency and low noise. It converts input power by transferring charge from one capacitor to another in order to adjust the output voltage. A typical use is to convert the 1.8V to 5.5V input voltage range to 2.8V output voltage required for portable consumer electronics. The ISL6531CB can achieve up to 80% efficiency, allowing extended battery life with minimal power losses.

The device operates with a high frequency clock and operates in a voltage-inverting mode. The clock frequency can be adjusted from 0.2MHz to 2.6MHz in order to optimize the efficiency of the converter. The device also includes a soft frequency tracking feature that can reduce the clock frequency when the device is operating in light load conditions. This allows the converter to adjust its operating frequency to maximize the efficiency for the current operating load.

The ISL6531CB also includes a programmable slew rate control, which prevents overshoot and undershoot on the output. This feature can be used to reduce EMI and simultaneously improve transient response by controlling the rate of change on the output current. The device also includes built-in undervoltage and overvoltage protection along with programmable current limiting and thermal protection.

In addition to the protection features, the ISL6531CB also provides an active load disconnect feature to protect battery life. When the device is in shutdown, the load is disconnected from the battery, preventing current leakage. This feature ensures that the battery is protected from self-discharge and that the system remains in a low power state.

The ISL6531CB is an ideal device for high performance and low power voltage conversion applications. It can achieve up to 80% efficiency and is small and lightweight, making it well suited for small form factor and portable applications such as mobile phones and other battery powered consumer electronics.

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