ISL9021IRUJZ-T

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

The ISL9021IRUJZ-T is a fixed-output linear low-dropout (LDO) regulator manufactured by Renesas Electronics Corporation. It provides a fixed output voltage of 2.8V with a maximum continuous load current of 250mA. The device features a maximum input voltage of 5.5V and a typical quiescent current of 50 µA. Key electrical parameters include a maximum dropout voltage of 0.25V at full load, high power supply rejection ratio (PSRR), and an operating temperature range of -40°C to +85°C. It is housed in a compact 6-UTDFN (1.6x1.6 mm) surface-mount package.

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

• Provides stable regulation with guaranteed 250mA continuous output current capability.
• Features ultra-low quiescent current for enhanced efficiency in battery-powered applications.
• Delivers high power supply rejection ratio (PSRR) to minimize noise on sensitive loads.
• Includes comprehensive protection mechanisms such as over-current, thermal shutdown, reverse polarity, and soft-start.

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

• Portable consumer electronics requiring low-noise power supplies
• Battery-operated devices prioritizing extended runtime through low IQ
• Embedded systems needing stable voltage regulation under varying load conditions

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

Verify component authenticity due to End-of-Life (EOL) status announced on September 23, 2023. Confirm RoHS3 compliance and MSL Level 1 classification during sourcing. Check for valid manufacturer markings and packaging integrity, as availability may be limited to existing stock or surplus channels. Ensure the specific suffix matches the required output voltage variant.

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

Select this component when a fixed 2.8V output is required with minimal external components. Consider the 6-UTDFN package size for space-constrained designs. Evaluate the 50 µA quiescent current against system sleep requirements. Verify that the input voltage does not exceed 5.5V and that thermal dissipation remains within limits for the specified ambient temperature range.

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

The ISL9021 series belongs to Renesas' portfolio of single LDO regulators designed for low-voltage, low-noise applications. This specific part number denotes the 2.8V fixed output variant in the UTDFN-6 package. The series is characterized by its ability to drive 250mA while maintaining stability with small output capacitors, typically 1µF.

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

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the EOL status, alternative sources should be evaluated based on pin compatibility, electrical specifications, and package dimensions.