ISL9021AIRUYZ-T

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

The ISL9021AIRUYZ-T is a single-output low-dropout (LDO) linear voltage regulator manufactured by Renesas Electronics Corporation. It provides a guaranteed continuous output current of 250mA with an input voltage range spanning from 1.5V to 5.5V. The device features a fixed output voltage of 3.0V, maintaining an accuracy of ±1.8% across temperature, line, and load variations. Key electrical parameters include a typical power supply rejection ratio (PSRR) of 75dB at 10kHz and 50dB at 1MHz, alongside a low quiescent current of 35µA. The dropout voltage is specified as less than 150mV at full load. The component operates within a temperature range of -40°C to +85°C and is housed in a compact 6-lead µTDFN package measuring 1.6mm x 1.6mm.

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

• High performance LDO delivering 250mA continuous output current with low noise and high PSRR capabilities
• Operates stably with small output capacitors ranging from 1µF to 4.7µF, supporting an ESR range of 5mΩ to 400mΩ
• Integrated protection mechanisms including soft-start for input current surge limiting, overcurrent protection, and thermal shutdown

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

• Portable instruments and handheld devices
• Cell phones and smart phones
• MP3 players and other portable media devices

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

Verify the specific suffix 'AIRUYZ-T' against official Renesas documentation to confirm the exact output voltage and package variant. Confirm RoHS compliance status and check for End-of-Life notices or Product Change Notifications prior to procurement. Ensure compatibility with required PCB footprint dimensions for the 6-lead µTDFN package.

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

Select this component when designing circuits requiring a stable 3.0V rail from inputs between 1.5V and 5.5V. It is suitable for space-constrained applications due to its small footprint. Consider the 35µA quiescent current for battery-powered designs. Verify that the external capacitor values fall within the 1µF to 4.7µF range to ensure stability.

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

This part belongs to the ISL9021A series of single LDO regulators. The series is characterized by high performance, low input voltage requirements, and high PSRR. Variants within the family offer different fixed output voltages and packaging options, including WLCSP and µTDFN formats, catering to diverse portable electronic design needs.

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

Consult official Renesas datasheets for direct pin-compatible substitutes within the ISL9021 series. Verify equivalent electrical specifications such as output current, dropout voltage, and PSRR before considering alternative manufacturers.