ISL9103AIRUBZ-T

Voltage Regulators - DC DC Switching Regulators Overview

The ISL9103AIRUBZ-T is a synchronous buck converter from the ISL9103 family, manufactured by Renesas Electronics. It operates with a fixed 2.4 MHz switching frequency 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 1.8 V output. 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 logic-controlled shutdown. The component is housed in a compact 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 discharge output capacitor 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 'RUB' against the official datasheet to confirm the fixed 1.8 V output voltage option. Confirm the 'Z' suffix indicates RoHS compliance. Check for End-of-Life (EOL) status or discontinuation notices, as similar variants in this series have been marked obsolete. Ensure the uTDFN-6 footprint matches the design requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a fixed 1.8 V output is required within a 2.7 V to 6.0 V input range. The 2.4 MHz frequency allows for smaller passive components compared to lower-frequency alternatives. The ultrasonic operation in light load conditions makes it suitable for audio-sensitive applications. Verify that the 500 mA output current meets the system's maximum load requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the ISL9103/ISL9103A series of low IQ high efficiency synchronous buck converters. The 'A' variant typically denotes specific acoustic noise characteristics, such as the ultrasonic skip mode feature present in this model. The series is designed for portable electronics requiring small form factors and high efficiency.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Similar variants like ISL9103AIRUAZ-T exist but differ in output voltage configuration (adjustable vs. fixed). Verify compatibility before substitution.