ISL9021AIIFZ-T

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

The ISL9021AIIFZ-T is a single-output fixed linear voltage regulator (LDO) manufactured by Renesas Electronics Corporation. It provides a fixed output voltage of 3V with a guaranteed continuous load current of 250mA. The device operates within an input voltage range of 1.5V to 5.5V and features a maximum dropout voltage of 250mV at full load. It utilizes a 4-ball WLCSP package (1.16x0.98mm). The regulator maintains a voltage regulation accuracy of 0.8% and includes protection mechanisms such as overcurrent, thermal shutdown, reverse polarity, short circuit, and soft start capabilities.

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

• High power supply rejection ratio (PSRR) for effective noise filtering
• Ultra-low quiescent current consumption for battery efficiency
• Integrated comprehensive protection against overload and thermal stress

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

• Portable consumer electronics requiring low-noise power rails
• Battery-operated devices prioritizing extended operational life
• RF modules and sensors sensitive to power supply ripple

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

Verify component authenticity through authorized channels due to potential availability constraints. Confirm RoHS compliance status and specific manufacturing lot dates upon order confirmation. Ensure the WLCSP-4 package footprint matches the design layout precisely. Check for any recent product change notices regarding packaging or labeling updates before finalizing procurement plans.

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

Select this component when a fixed 3V output is required from inputs between 1.5V and 5.5V. It is suitable for space-constrained designs due to its small WLCSP form factor. Choose this LDO over adjustable types if system stability and simplified external component count are priorities. Ensure the application does not exceed the 250mA continuous current rating.

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

This part belongs to the ISL9021A series of high-performance LDOs designed for low-voltage applications. The series offers various fixed output voltages ranging from 1.2V to 3.3V in different packages including uTDFN and WLCSP. It targets markets demanding high PSRR and low noise in compact footprints.

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

Consult official cross-reference lists for direct substitutes. Verify pinout compatibility and electrical specifications match exactly. Consider package differences if replacing with other series members.