ISL9005AIRFZ-T

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

The ISL9005AIRFZ-T is a single-output low dropout linear regulator from the ISL9005A series, manufactured by Renesas Electronics Corporation. It provides a fixed output voltage of 1.8 V with a maximum output current of 300 mA. The device operates within an input voltage range of 2.3 V to 6.5 V and features a typical dropout voltage of 200 mV at full load. Key electrical parameters include a quiescent current of 50 µA, power supply rejection ratio of 75 dB at 1 kHz, and output noise of typically 45 µVRMS. Voltage regulation accuracy is ±1.8% across the operating temperature range of -40°C to +85°C. The component is housed in a compact 2mm x 3mm 8-lead DFN package.

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

• High performance LDO capable of sourcing 300mA current with excellent transient response to large current steps
• Low standby current consumption and high PSRR for efficient power management in portable applications
• Integrated soft-start functionality to limit input current surge during enable, alongside current limit and overheat protection

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

• PDAs, cell phones and smart phones
• Portable instruments and MP3 players
• Handheld devices including medical handhelds

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

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential counterfeits. Confirm RoHS compliance and Pb-free status as specified in official datasheets. Check for moisture sensitivity level requirements prior to soldering. Ensure storage conditions adhere to humidity control standards to prevent damage before reflow assembly.

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

Select this regulator when a fixed 1.8V output is required with up to 300mA load capability. It is suitable for space-constrained designs utilizing the 8-lead DFN package. Consider its 75dB PSRR and low noise characteristics for sensitive analog circuits. Verify that the input voltage remains within the 2.3V to 6.5V range for proper operation.

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

This component belongs to the ISL9005A family of low dropout regulators designed for portable electronics. It shares architectural similarities with other single-output LDOs in the portfolio but is distinguished by its specific 1.8V fixed output and 300mA current rating. The series emphasizes low quiescent current and high power supply rejection for battery-powered applications.

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

Public confirmed substitute part numbers are not available in the provided documentation.