ISL91128IINZ-T7A

The ISL91128IINZ-T7A from Renesas is a high-current buck-boost switching regulator featuring Intersil’s proprietary algorithm for excellent efficiency and low output voltage ripple. It supports input voltages both above and below the regulated output voltage, with automatic and seamless transitions between buck and boost modes.

This regulator is capable of delivering up to 2.4A continuous output current and operates over an input voltage range of 1.8V to 5.5V. It boasts a high efficiency of up to 96% and a low quiescent current of only 30µA, optimizing performance under various load conditions. The device includes a selectable bypass mode for power saving in low-power applications.

With a programmable output voltage range of 1.9V to 5.0V and a programmable slew rate, the ISL91128IINZ-T7A is suitable for applications requiring dynamically changing supply voltages. It features a 2.5MHz switching frequency to minimize external component size and is available in a compact 20-bump WLCSP package measuring 2.15mm x 1.74mm. The regulator is fully protected against short-circuit, over-temperature, and undervoltage conditions.

Key features include an I2C interface for programmable features, automatic transitions between buck and boost modes, and a fully synchronous 4-switch architecture. Applications include brownout-free system voltage for smartphones and tablet PCs, wireless communication devices, and 2G/3G/4G RF power amplifiers.