ISL9021AIRUJZ-T

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

The ISL9021AIRUJZ-T is a single-output low dropout (LDO) linear voltage regulator manufactured by Renesas Electronics Corporation. It provides a fixed output voltage of 3.3V with a maximum continuous load current of 250mA. The device operates within an input voltage range of 1.5V to 5.5V and features a typical quiescent current of 50µA. It utilizes a 6-UTDFN package measuring 1.6x1.6mm. The regulator ensures high power supply rejection ratio (PSRR) performance across frequencies from 1kHz to 1MHz. Operating temperatures range from -40°C to +85°C, with a maximum dropout voltage of 0.25V at full load.

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

• Delivers guaranteed continuous 250mA load current capability for stable power delivery.
• Provides high power supply rejection ratio (PSRR) to minimize noise sensitivity.
• Integrates comprehensive protection mechanisms including overcurrent, thermal shutdown, reverse polarity, short circuit, and soft-start functionality.
• Features a compact 6-UTDFN surface-mount package suitable for space-constrained designs.

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

• Portable electronic devices requiring efficient power management
• Battery-powered systems needing low quiescent current operation
• Embedded circuits demanding stable regulated voltage rails
• Noise-sensitive analog sections in mixed-signal applications

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

Verify component authenticity through authorized distributors or direct manufacturer channels due to end-of-life status. Confirm RoHS compliance and moisture sensitivity level (MSL 1) requirements during storage and handling. Ensure proper ESD precautions are observed given the small form factor. Cross-reference datasheet revisions to confirm pinout and electrical characteristics match design specifications before integration.

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

Select this component when a fixed 3.3V output is required with moderate current demands up to 250mA. Consider its low quiescent current for battery-operated applications where efficiency is critical. Evaluate the 6-UTDFN footprint against available board space constraints. Verify that the input voltage range accommodates the system's supply variations while maintaining regulation under expected load conditions.

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

The ISL9021AIRUJZ-T belongs to the ISL9021A series of low dropout regulators designed for high-performance applications. This series emphasizes low noise and high PSRR characteristics suitable for sensitive analog circuits. The specific variant offers a fixed 3.3V output, distinguishing it from other adjustable or different fixed-voltage options within the same family. It represents Renesas' focus on compact, efficient power solutions for modern electronics.

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

This product is officially marked as obsolete. Check for alternative packages or updated part numbers within the ISL9021A series if availability is required. Consult manufacturer documentation for recommended replacements or last-time buy information. Ensure any substitute component matches the electrical specifications and physical footprint to maintain design integrity.

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

What is the maximum input voltage for the ISL9021AIRUJZ-T?

The maximum input voltage rating for this regulator is 5.5V.

Does the ISL9021AIRUJZ-T include protection features?

Yes, it includes overcurrent protection, thermal shutdown, reverse polarity protection, short circuit protection, and soft-start functionality.

What is the operating temperature range?

The device operates within a temperature range of -40°C to +85°C.