ISL9103AIRUAZ-T

Voltage Regulators - DC DC Switching Regulators Overview

The ISL9103AIRUAZ-T is a synchronous buck converter from the ISL9103 family, manufactured by Renesas Electronics. It operates with a fixed switching frequency of 2.4 MHz and delivers a guaranteed output current of 500 mA. The device accepts an input voltage range of 2.7 V to 6.0 V and provides a fixed output voltage of 1.8 V. It features 3% output accuracy over temperature and line conditions, with a quiescent supply current of 20 µA in skip mode and less than 1 µA in shutdown. The component is housed in a 6-pin uTDFN package measuring 1.6 mm x 1.6 mm.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• High-efficiency integrated synchronous buck regulator architecture
• Ultrasonic switching frequency in skip mode to prevent audible noise
• Internal digital soft-start with peak current limiting and short circuit protection
• Logic-controlled shutdown with output capacitor discharge capability

Voltage Regulators - DC DC Switching Regulators Applications

• PDAs and Palmtops
• WCDMA Handsets

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'AIRUAZ-T' against official Renesas documentation to confirm the 1.8 V fixed output variant and tape-and-reel packaging. Confirm RoHS compliance status as indicated in the datasheet. Check for End-of-Life (EOL) notifications or Product Change Notifications (PCN), as distributor records indicate this part may be obsolete or subject to discontinuation. Ensure the supplier provides valid traceability for the uTDFN-6 package.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact, low-noise power solution is required for battery-operated mobile devices. The 2.4 MHz frequency allows for smaller passive components compared to lower-frequency alternatives. The ultrasonic skip mode is critical for applications sensitive to audible coil whine. Verify that the 1.8 V fixed output meets the load requirements without needing external feedback resistors, simplifying the PCB layout.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the ISL9103 series of low IQ high efficiency synchronous buck converters. It shares architectural similarities with the ISL9104, which offers a higher 4.3 MHz switching frequency. Both are designed for portable electronics requiring small footprints and high efficiency. The ISL9103AIRUAZ-T specifically targets applications where audible noise reduction at light loads is a priority due to its ultrasonic operation.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.