ISL9021IRUWZ-T

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

The ISL9021IRUWZ-T is a single-output, positive fixed voltage linear regulator from Renesas Electronics Corporation. It operates with a maximum input voltage of 5.5V and provides a fixed output of 3.0V. The device delivers a guaranteed continuous load current of 250mA with a typical dropout voltage of 0.25V at full load. It features a low quiescent current of 50 µA and high power supply rejection ratio (PSRR) ranging from 60dB to 50dB across frequencies of 1kHz to 1MHz. The component is housed in a compact 6-UTDFN (1.6x1.6) surface-mount package.

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

• Provides high performance with low input voltage operation and high PSRR for clean power delivery.
• Delivers guaranteed continuous 250mA load current while remaining stable with small output capacitors.
• Integrates comprehensive protection mechanisms including overcurrent, thermal shutdown, reverse polarity, short circuit, and soft start capabilities.

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

• Portable electronic devices requiring efficient power management
• Battery-powered systems needing low quiescent current
• Embedded applications utilizing single-output positive fixed voltage regulation

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

Verify the specific output voltage variant required, as the ISL9021 family includes multiple fixed options such as 1.8V, 2.85V, and 3.3V. Confirm that the 6-UTDFN package dimensions align with the PCB footprint design. Check for end-of-life status or obsolescence notices, as some variants in this series have been discontinued by the manufacturer. Ensure compatibility with the target operating temperature range of -40°C to 85°C.

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

Select this component when a single LDO with high PSRR and low dropout characteristics is needed for noise-sensitive circuits. It is suitable for designs requiring a fixed output voltage with a maximum load of 250mA. Consider the 6-UTDFN package size for space-constrained layouts. Verify that the input voltage does not exceed the 5.5V maximum rating and that the required output voltage matches the specific suffix of the part number.

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

The ISL9021 series consists of single LDO regulators designed for high-performance applications. These devices are characterized by low input voltage operation and high power supply rejection ratios. They are engineered to provide stable regulation with minimal external components, specifically remaining stable with just a 1µF capacitor. The series supports various fixed output voltages to accommodate different digital logic levels.

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

Public confirmed substitute part numbers were not identified in the provided documentation. Users should consult official Renesas cross-reference tools or datasheets for verified alternatives, noting that specific variants within the ISL9021 family may have different output voltages and availability statuses.