ISL9021IRU1Z-T

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

The ISL9021IRU1Z-T is a fixed-output low-dropout (LDO) linear regulator manufactured by Renesas Electronics Corporation. It provides a fixed output voltage of 3.0V with a maximum output current capability of 250mA. The device operates within an input voltage range of 1.5V to 5.5V and features a typical dropout voltage of 150mV at full load. It utilizes a 6-lead Ultra Thin Dual Flat No-Lead (UTDFN) package measuring 1.6mm x 1.6mm. The component supports an operating temperature range from -40°C to +85°C.

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

• Integrated reverse current protection mechanism designed specifically for WLCSP and 1.6mm x 1.6mm 6-lead µTDFN packages to prevent backflow.
• High power supply rejection ratio performance, achieving 75dB at 10kHz and 50dB at 1MHz to minimize noise coupling.
• Includes comprehensive internal protection circuits covering overcurrent, thermal shutdown, reverse polarity, short circuit, and soft-start functionality.

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

• Portable battery-powered consumer electronics requiring stable low-noise power rails
• RF modules and wireless communication interfaces sensitive to power supply ripple
• Embedded systems utilizing microcontrollers or sensors needing precise fixed voltage regulation

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

Verify the specific suffix configuration against official datasheets, as variations exist within the ISL9021 family regarding output voltage and package type. Confirm availability status directly with authorized distributors, as this part number may be subject to end-of-life notices or discontinuation. Ensure compatibility with existing PCB footprints for the 6-UTDFN package before finalizing procurement decisions.

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

Select this component when a fixed 3.0V rail is required with moderate current demands up to 250mA. It is suitable for designs prioritizing low noise and high PSRR in space-constrained applications due to its small footprint. Consider alternative variants if different output voltages or higher current capabilities are needed, as the base model offers multiple fixed options.

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

This device belongs to the ISL9021 series of single LDO regulators known for low quiescent current and high accuracy. The series is engineered for portable applications where battery life and signal integrity are critical. It complements other power management solutions by providing clean, regulated voltage for sensitive analog and digital loads.

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

Direct substitutes include other ISL9021 variants with matching 3.0V output and 250mA rating, such as ISL9021AIRUCZ-T or ISL9021IIMZ-T, provided the package and electrical specifications align with the design requirements.