ISL9021AIIUZ-T

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

The ISL9021AIIUZ-T is a fixed-output low-dropout (LDO) linear voltage regulator manufactured by Renesas Electronics. It provides a fixed output voltage of 1.2 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. It incorporates internal protection mechanisms including overcurrent limiting, thermal shutdown, reverse polarity protection, and soft-start functionality. The component is housed in a compact WLCSP-4 package and supports operation across a temperature range of -40°C to +85°C.

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

• Delivers high power supply rejection ratio (PSRR) for effective noise filtering
• Maintains low quiescent current to optimize system power efficiency
• Integrates comprehensive protection against overcurrent, thermal overload, and short circuits

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

• Portable battery-powered consumer electronics
• Wireless communication modules requiring stable low-noise power
• Embedded systems with strict space constraints

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

Verify the specific suffix 'IIUZ' against official Renesas documentation to confirm the exact output voltage and package variant, as suffixes define critical electrical parameters. Confirm end-of-life status and availability through authorized distributors, as this component may be discontinued or subject to last-time buy restrictions. Ensure compatibility with RoHS3 compliance requirements for your manufacturing process.

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

Select this component when a fixed 1.2 V output is required from a single-cell lithium-ion or similar low-voltage source. The WLCSP-4 package is suitable for applications demanding minimal board space. Consider the 250 mA current limit and dropout characteristics relative to the expected load profile and minimum input voltage conditions.

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

This part belongs to the ISL9021A series of single LDO regulators designed for low-input voltage and high-performance applications. The series offers various fixed output voltages and packaging options to support diverse portable electronic designs while maintaining consistent performance metrics such as low noise and high PSRR.

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

Consult official cross-reference data for direct substitutes. Verify that any alternative maintains the same 1.2 V output, 250 mA current rating, and WLCSP-4 footprint to ensure mechanical and electrical compatibility without redesign.