ISL9021IRUCZ-T

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

The ISL9021IRUCZ-T is a fixed-output linear low-dropout (LDO) voltage regulator manufactured by Renesas Electronics. It provides a fixed output voltage of 2.85V with a maximum continuous output current of 250mA. The device operates within an input voltage range of 1.5V to 5.5V and features a typical dropout voltage of 250mV at full load. It utilizes a 6-UTDFN package measuring 1.6mm x 1.6mm, suitable for surface-mount applications across a temperature range of -40°C to +85°C.

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

• Integrated reverse current protection prevents backflow from the output to the input, ensuring system safety in WLCSP and µTDFN configurations.
• Includes comprehensive protection mechanisms such as overcurrent limiting, thermal shutdown, and soft-start functionality to safeguard against fault conditions.

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

• Portable battery-powered consumer electronics requiring stable low-noise power rails
• Embedded systems utilizing microcontrollers or memory components needing precise voltage regulation
• Wireless communication modules operating within standard single-cell lithium-ion voltage ranges

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

Verify component authenticity through authorized distributors due to end-of-life status. Confirm package integrity upon receipt, as WLCSP and small footprint packages are sensitive to moisture and mechanical stress. Ensure storage conditions meet JESD22-A113 standards to prevent lead frame corrosion before reflow soldering processes.

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

Select this regulator when a fixed 2.85V rail is required with minimal external component count. Consider the 250mA current limit and 5.5V maximum input voltage constraints during design. Evaluate thermal dissipation requirements based on the specific PCB copper area available for heat spreading in the 6-UTDFN package.

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

This component belongs to the ISL9021 family of ultra-low noise LDO regulators designed for RF and high-speed digital applications. The series emphasizes high Power Supply Rejection Ratio (PSRR) and low quiescent current to extend battery life in portable devices while maintaining signal integrity.

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

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative LDOs offering similar 2.85V output, 250mA capacity, and 6-UTDFN pinout if sourcing new inventory.