ISL9021IRUFZ-T

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

The ISL9021IRUFZ-T is a single-output linear voltage regulator (LDO) manufactured by Renesas Electronics Corporation. It provides a fixed output voltage of 2.5 V with a maximum continuous load current 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 utilizes a 6-UTDFN (1.6x1.6 mm) surface-mount package. The unit supports an operating temperature range from -40°C to +85°C.

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

• High power supply rejection ratio (PSRR) for low-noise performance
• Stable operation with small 1 µF ceramic output capacitors
• Integrated protection against overcurrent, thermal overload, reverse polarity, and short circuits
• Includes soft-start functionality to limit inrush current

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

• Portable battery-powered electronic devices
• RF and communication modules requiring low noise
• Microcontroller power supplies
• Sensor interface circuits

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

Verify component authenticity through authorized channels as the part may be subject to obsolescence or lifecycle changes. Confirm that the 6-UTDFN footprint matches the design layout. Ensure compliance with RoHS3 standards if required by the target market regulations. Check for specific datasheet revisions that may affect electrical characteristics or pin definitions before finalizing procurement.

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

Select this component when a fixed 2.5 V rail is required with moderate current demands up to 250 mA. It is suitable for applications prioritizing low noise and high PSRR over ultra-low quiescent current. The small 6-UTDFN package makes it ideal for space-constrained designs. Consider alternative variants within the ISL9021 family if different output voltages or higher current capabilities are needed.

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

The ISL9021 series consists of low-dropout regulators designed for high-performance analog and RF applications. This specific variant offers a fixed 2.5 V output. The series is characterized by its ability to maintain stability with minimal external capacitance, simplifying board layout. It belongs to the broader portfolio of power management integrated circuits (PMICs) offered by Renesas for consumer and industrial electronics.

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

Direct substitutes include other ISL9021 variants with different fixed output voltages, such as ISL9021AIRUCZ-T (1.8 V) or ISL9021AIRUNZ-T (3.3 V), provided the system voltage requirements align. Cross-referencing with equivalent LDOs from other manufacturers requires verification of pin compatibility, thermal performance, and capacitor stability requirements.