ISL9003AIRUMZ-T

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

The ISL9003AIRUMZ-T is a single-output low dropout regulator (LDO) manufactured by Renesas Electronics, formerly Intersil. It provides a fixed 3V output with a maximum continuous load current of 150mA. The device operates within an input voltage range of 2.3V to 6.5V and features a typical dropout voltage of 200mV at full load. Quiescent current is specified at 31µA, rising to 1µA maximum in shutdown mode. It utilizes a 6-lead µTDFN package and maintains stability with ceramic output capacitors ranging from 1µF to 4.7µF.

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

• High power supply rejection ratio exceeding 90dB at 1kHz for effective noise filtering
• Low output noise typically 20µVRMS ensuring clean power delivery for sensitive circuits
• Integrated thermal protection and current limit safeguards against overload conditions
• Soft-start functionality limits input current surge during enable transitions

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

• Portable instruments and handheld medical devices
• Cell phones and smart phones
• MP3 players and personal digital assistants

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

Verify component authenticity through authorized distributors due to discontinuation status. Confirm package marking and datasheet revision alignment. Check for end-of-life notifications or last-time-buy deadlines. Ensure storage conditions comply with moisture sensitivity levels. Validate supplier documentation for RoHS compliance and traceability records prior to acquisition.

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

Select this LDO when low noise and high PSRR are critical for analog signal integrity. The fixed 3V output suits systems requiring stable rail generation from varying input sources. Consider the 150mA current limit for moderate load requirements. The µTDFN package offers space efficiency for compact portable designs. Evaluate capacitor ESR requirements to ensure stability with 1µF to 4.7µF MLCCs.

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

This component belongs to the ISL9003A series of low-noise LDOs designed for portable electronics. It shares architectural similarities with other Intersil regulators but is distinguished by its specific 3V fixed output and 150mA current rating. The series emphasizes low quiescent current and high PSRR, targeting applications where battery life and signal purity are paramount constraints.

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

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with direct replacements by matching electrical parameters such as output voltage, current capacity, and package dimensions. Consult manufacturer cross-reference guides for updated PMIC solutions if this part is discontinued.