ISL9021IRU3Z-T

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The ISL9021IRU3Z-T is a single-output fixed linear low-dropout (LDO) voltage regulator manufactured by Renesas Electronics Corporation. It provides a fixed output voltage of 1.3 V with a maximum continuous load current capability of 250 mA. The device operates within an input voltage range of 1.5 V to 5.5 V and features a typical dropout voltage of 150 mV at full load, with a maximum specified dropout of 250 mV. It incorporates comprehensive protection mechanisms including overcurrent, thermal shutdown, reverse polarity, short-circuit, and soft-start functionality. The component is housed in a compact 6-UTDFN package measuring 1.6 x 1.6 mm and is rated for operation between -40°C and +85°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Delivers high power supply rejection ratio (PSRR) performance suitable for noise-sensitive applications
• Features ultra-low quiescent current consumption to optimize battery life in portable devices
• Generates minimal output voltage noise for clean power delivery to sensitive circuits
• Integrates multiple protection functions including thermal shutdown and reverse polarity blocking

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Portable consumer electronics requiring stable low-voltage power rails
• Battery-powered systems prioritizing energy efficiency and extended runtime
• Noise-sensitive analog or RF circuit sections needing clean power supplies
• Embedded systems utilizing microcontrollers or sensors with strict voltage tolerance requirements

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify component authenticity through authorized channels as the part is officially obsolete. Confirm package integrity and pin alignment against the 6-UTDFN specification before integration. Review the latest Product Change Notification (PCN) documents for any manufacturing origin updates. Ensure design compatibility with the fixed 1.3 V output requirement since adjustable variants are not available in this specific suffix configuration.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 1.3 V rail is required with minimal footprint constraints. The 6-UTDFN package offers space efficiency compared to larger alternatives. Consider the 250 mA current limit for load requirements; higher current needs may require parallel configurations or different regulators. Evaluate the input voltage headroom to ensure the dropout voltage remains within acceptable limits under all operating conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This device belongs to the ISL9021 series of low-dropout regulators designed for low-power applications. The series includes various output voltage options and packages, but this specific model is optimized for 1.3 V output. It shares common architectural features with other members of the family, such as low noise and high PSRR, tailored for modern portable electronic designs.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

The manufacturer has declared this product obsolete. No direct public substitute part numbers are confirmed in the provided documentation. Designers should consult official cross-reference tools or contact Renesas support for validated alternative components that meet the same electrical and mechanical specifications.