ISL6558CBZA

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The ISL6558CBZA is a feature-rich, high frequency (up to 2 MHz) DC–DC switching controller that delivers outstanding performance. This device combines a 16-bit microcontroller peripheral with a voltage mode MOSFET gate driver, making it suitable for a variety of voltage regulation applications. The ISL6558CBZA also provides several embedded protections, including power overseal and over-current protection, allowing designers to confidently implement designs for stringent efficiency and reliability.

The ISL6558CBZA is an ideal solution for DC–DC applications that require quick system startup and robust, low-noise operation. With features such as programmable soft-start, overshoot and undershoot prevention, and fast fault support, the ISL6558CBZA can be used to quickly and reliably implement power supplies. The device also features programmability of the output voltage range for flexibility in implementation of different systems.

The ISL6558CBZA also offers a number of diagnostic and fault protection features to help insure reliable operation of the system. These include PGOOD switching logic and output voltage margining. In addition, I2C monitoring and control of the SWFB pin can be used to monitor the switching frequency of the device. Additionally, the device offers steadystate and overcurrent protection as well as power over-the-air, providing robust protection to the device and system.

The ISL6558CBZA is designed to be used in any application that requires a DC–DC switching controller, such as applications in telecommunications, computing, consumer, and industrial markets. The device is ideal for providing various output voltages from a single input voltage source, such as the power distribution in radio frequency and intermediate frequency amplifiers, for powering core logic, memory and I/O components in computer motherboard applications and for supplying power to high frequency switching converters used in cellular and other hand-held device applications.

The ISL6558CBZA is based on voltage mode switching technology and relies on a pulse-width modulation (PWM) technique to regulate the output voltage. This device features both a programmable reference and gate driver that allows designers to configure the device for different operating conditions. The ISL6558CBZA also provides a flexible low side drive reference, allowing designers maximum flexibility in setting the output voltage. The device also has an optimized and low-cost single-stage compensation network that requires minimal external components.

In addition to its basic DC–DC switching controller features, the ISL6558CBZA provides a number of protection features for reliable operation. These include current and power limit protection, open loop protection, unbalance load protection and active load protection. The device also provides output over-voltage protection, UVLO detection and fault protection. This ensures that the system is always protected against over-voltage and under-voltage conditions, as well as during overload conditions.

The ISL6558CBZA DC–DC switching controller is an ideal choice for a variety of applications that require reliable, low-noise operation at high frequency. This device offers an integrated 16-bit microcontroller peripheral, programmability of the output voltage range, a variety of protection features, and wide operating temperature range, making it suitable for a variety of voltage regulation needs.

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