ISL9005IRNZ-T

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

The ISL9005IRNZ-T is a fixed-output Low Dropout linear regulator manufactured by Renesas Electronics Corporation, providing a stable 3.3V output with a maximum continuous current of 300mA. It operates within an input voltage range of 2.3V to 6.5V and features a typical quiescent current of 50µA in active mode, dropping to 0.1µA during shutdown. The device incorporates a soft-start function to limit input current surges upon enablement. It maintains high power supply rejection ratio (PSRR) performance of 75dB at 1kHz and ensures low output noise below 45µVRMS. The unit is housed in a compact 8-lead 2mm x 3mm Dual Flat No-Lead (DFN) package.

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

• Integrates soft-start circuitry to minimize initial ramp-up rate and prevent input current surge during the enable sequence.
• Provides comprehensive protection mechanisms including internal current limiting and smart thermal shutdown to safeguard against overheating.
• Ensures stability when paired with ceramic output capacitors ranging from 1µF to 10µF with equivalent series resistance up to 200mΩ.

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

• Portable wireless equipment such as PDAs and smartphones
• Handheld medical instruments and portable diagnostic devices
• MP3 players and other battery-powered consumer electronics

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

Verify component authenticity through authorized channels due to potential availability issues. Confirm that the specific ordering suffix matches the required 3.3V fixed output voltage. Ensure compliance with RoHS standards and verify moisture sensitivity levels prior to surface mount assembly processes.

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

Select this component for designs requiring a fixed 3.3V rail with minimal standby power consumption. Evaluate the dropout voltage characteristics relative to the minimum expected input voltage under full load conditions. Consider the thermal dissipation capabilities of the 8-lead DFN package based on the ambient operating temperature and PCB copper area available for heat spreading.

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

This part belongs to the ISL9005 family of high-performance LDOs designed for portable applications. It shares architectural similarities with variants offering different fixed output voltages, such as 1.5V or 2.8V, while maintaining identical pinouts and package dimensions. The manufacturer has indicated it is not recommended for new designs, suggesting consideration of updated alternatives for future projects.

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

The datasheet explicitly recommends the ISL9005A as the replacement part. Verify if the ISL9005A variant supports the required 3.3V output configuration and confirm compatibility with existing PCB layouts and software control logic before transitioning.