ISL9021AIRUJZ-T7A

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

The ISL9021AIRUJZ-T7A is a fixed-output low-dropout linear regulator manufactured by Renesas Electronics Corporation. It provides a fixed positive output voltage of 1.5 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 0.15 V, with a maximum specified at 0.25 V. It maintains a quiescent current of 50 µA and offers high power supply rejection ratio performance, typically 75 dB at 10 kHz and 50 dB at 1 MHz. The component is housed in a compact 6-UTDFN package measuring 1.6 x 1.6 mm.

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

• Provides stable regulation for sensitive circuits through high power supply rejection ratio across varying frequencies.
• Enables efficient power management via ultra-low quiescent current consumption during operation.
• Ensures system reliability through integrated protection mechanisms including overcurrent, thermal shutdown, reverse polarity, and short-circuit safeguards.

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

• Portable battery-powered consumer electronics requiring stable low-voltage rails
• Wireless communication modules needing low-noise power supplies
• Embedded systems utilizing microcontrollers or sensors with 1.5 V logic levels

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

Verify the exact suffix configuration against official datasheets, as variations exist within the ISL9021A family. Confirm package dimensions and pinout compatibility with your PCB layout. Check manufacturer announcements for end-of-life status or alternative recommendations, as discontinuation notices may affect long-term availability. Ensure input and output capacitor values meet stability requirements specified in the technical documentation.

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

Select this component when a precise 1.5 V output is required with minimal noise sensitivity. Consider the 250 mA current limit for load demands and verify that the 1.5 V minimum input voltage aligns with your source supply. Evaluate the 6-UTDFN footprint constraints against your board space limitations. Compare PSRR specifications against other LDOs if operating in high-interference environments.

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

This part belongs to the ISL9021A series of single-output LDO regulators designed for low-voltage, low-power applications. The series emphasizes high performance with low noise and high PSRR, suitable for RF and analog circuitry. Manufactured by Renesas (formerly Intersil), these devices are optimized for portable electronics where battery life and signal integrity are critical priorities.

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

Consult official substitution guides for equivalent parts within the ISL9021A family or newer generations from Renesas. Verify pin-to-pin compatibility and electrical parameter alignment before replacing. Cross-reference with industry-standard alternatives only if they match the specific 1.5 V output and 250 mA current rating exactly.