ISL9003IEBZ-T

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

The ISL9003IEBZ-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 1.5V 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

• Delivers excellent transient response to large current steps while maintaining stable operation with ceramic output capacitors.
• Integrates soft-start functionality to limit input current surge during enable and includes thermal shutdown protection.
• Features a dedicated enable pin that controls power state, allowing for ultra-low standby current consumption in shutdown mode.

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

• Portable wireless equipment
• PDAs, cell phones and smart phones
• Handheld medical devices

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

Verify the specific ordering suffix 'EBZ' confirms the 1.5V fixed output voltage variant. Confirm the '-T' suffix indicates tape-and-reel packaging specifications as defined in Intersil Technical Brief TB347. Ensure the component meets RoHS compliance requirements via the specified Pb-free material sets and tin plate plus anneal termination finish.

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

Select this component when designing circuits requiring low noise and high ripple rejection for sensitive analog or RF sections. The device is suitable for applications needing fast transient response and minimal quiescent current draw. Verify that the required output voltage matches the fixed 1.5V option available in this specific part number.

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

This component belongs to the ISL9003 family of low dropout regulators manufactured by Renesas Electronics (formerly Intersil). It is designed for portable electronics where battery life and signal integrity are critical. The device utilizes a 5-lead SC-70 plastic package to provide a compact footprint for space-constrained mobile designs.

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

The datasheet explicitly recommends the ISL9003A as the replacement part for new designs. Verify if the successor device meets all original electrical specifications and pinout compatibility before implementation.

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

What is the maximum equivalent series resistance allowed for the output capacitor?

The device remains stable with MLCC output capacitance having an ESR of up to 200mΩ.

How does the device protect against overheating?

It integrates smart thermal shutdown protection that momentarily shuts down the LDO when the die temperature reaches approximately +140°C.