ISL91108IIAZ-T

Voltage Regulators - DC DC Switching Regulators Overview

The ISL91108IIAZ-T is a high-efficiency buck-boost switching regulator manufactured by Renesas Electronics Corporation. It features a fully synchronous four-switch architecture that accepts input voltages above or below the regulated output voltage, automatically transitioning between operating modes without significant output disturbance. The device supports an input voltage range of 1.8V to 5.5V and delivers up to 1.6A DC output current at PVIN = 2.8V with VOUT = 3.3V. Burst current capability reaches 2.7A under specific conditions. It operates at a switching frequency of 2.6MHz and maintains a no-load quiescent current of 27.5µA. The component is housed in a compact WLCSP package measuring 2.34mm x 1.72mm.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Fully synchronous four-switch architecture enables seamless transitions between buck and boost modes without output disturbance
• Accepts input voltages both above and below the regulated output voltage for flexible power supply designs
• Optimized light-load efficiency achieved through ultra-low 27.5µA no-load quiescent current
• Compact solution size realized via 2.6MHz switching frequency and minimal external component count

Voltage Regulators - DC DC Switching Regulators Applications

• Standalone applications requiring wide input voltage flexibility
• Noise-sensitive systems utilizing forced PWM or external clock synchronization
• Battery-powered devices demanding high efficiency across varying load conditions
• Portable electronics needing compact power management solutions

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the exact suffix and manufacturer designation during procurement, as Intersil products are now part of Renesas Electronics. Confirm RoHS compliance status and moisture sensitivity level (MSL) requirements against your assembly specifications. Ensure the WLCSP-20 package dimensions align with your PCB footprint design. Check for any specific handling instructions related to the thin profile of the wafer-level chip scale package.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when input voltage fluctuates around the target output voltage, eliminating the need for complex mode control logic. Consider the 2.6MHz switching frequency if minimizing passive component size is critical. Evaluate the 1.6A continuous current rating against peak load requirements, noting the higher burst current capability for transient loads. Verify thermal performance within the small WLCSP footprint for your specific ambient temperature conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the ISL91108 series of high-efficiency buck-boost regulators. It shares architectural similarities with other members like the ISL91110 but offers distinct current ratings and package options. The series is designed for applications requiring robust performance in space-constrained environments where input voltage stability cannot be guaranteed.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.