ISL9003IEMZ-T

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

The ISL9003IEMZ-T is a single low noise, high PSRR LDO delivering 150mA continuous load current. It features a typical no-load quiescent current of 30µA and a shutdown current of 0.5µA. The device provides a fixed 3.0V output with ±1.8% accuracy over temperature, line, and load conditions. It operates within an input voltage range of 2.3V to 6.5V and maintains stability with 1µF MLCC output capacitors having up to 200mΩ ESR. Key performance metrics include a 90dB PSRR at 1kHz and a typical output noise of 20µVRMS.

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

• High performance LDO with excellent transient response to large current steps
• Extremely low quiescent current for portable wireless equipment
• Integrated soft-start limits input current surge during enable
• Current limit and overheat protection

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

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

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

Verify the exact part number suffix against official Renesas documentation to confirm the specific output voltage and package configuration. Confirm RoHS compliance status and check for any recommended replacement parts such as the ISL9003A if sourcing from legacy channels. Ensure compatibility with your PCB land pattern for the SC-70-5 package.

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

Select this component when low noise and high PSRR are critical for sensitive analog or RF circuits in battery-powered devices. The fixed 3.0V output suits systems requiring precise regulation without external resistors. Consider the 150mA current capability and wide input voltage range for versatile power management solutions in compact form factors.

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

The ISL9003 series belongs to Intersil's (now Renesas) portfolio of low dropout regulators designed for portable electronics. This specific variant offers a fixed 3.0V output in a 5-lead SC-70 package. The datasheet indicates it is not recommended for new designs, suggesting the availability of newer alternatives for future projects.

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

The datasheet explicitly recommends the ISL9003A as the replacement part for the ISL9003 series.

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

What is the maximum output capacitance recommended for stable operation?

The device is stable with output capacitance values ranging from 1µF to 4.7µF ceramic capacitors.

How does the CBYP pin affect performance?

Connecting a capacitor between the CBYP pin and ground tunes the noise and PSRR performance; a 0.1µF capacitor is recommended for lowest noise applications.