ISL9003IEFZ-T

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

The ISL9003IEFZ-T is a single-output fixed linear regulator (LDO) manufactured by Intersil. It provides a fixed output voltage of 2.5V 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 maximum dropout voltage of 0.4V at full load. Key electrical parameters include a quiescent current of 40µA and a maximum supply current of 57µA. It incorporates protection functions including overcurrent, thermal shutdown, soft-start, and undervoltage lockout (UVLO). The component is housed in a SC-70-5 surface-mount package and supports an operating temperature range from -40°C to +85°C.

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

• Provides low noise regulation with high power supply rejection ratio (PSRR) for sensitive analog circuits
• Ensures stability with small ceramic output capacitors, typically 1µF MLCC
• Integrates comprehensive protection mechanisms including thermal shutdown and current limiting
• Features a shutdown pin to minimize standby current consumption

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

• Portable consumer electronics such as PDAs and smart phones
• Battery-powered handheld instruments and medical devices
• Audio equipment requiring low noise power supplies like MP3 players
• General purpose low dropout regulation in space-constrained PCB designs

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

Verify the specific suffix 'EFZ' against the manufacturer datasheet to confirm the exact output voltage tolerance and package variant. Confirm RoHS compliance status and lead times with authorized distributors. Ensure the ordering quantity matches the standard reel or cut tape specifications provided by the supplier. Check for any recent product discontinuance notifications or lifecycle changes before finalizing procurement plans.

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

Select this component when a fixed 2.5V rail is required with minimal board space due to the SC-70-5 footprint. It is suitable for applications demanding low quiescent current to extend battery life. Consider the 150mA current limit when sizing for peak load requirements. Verify that the input voltage remains within the 2.3V to 6.5V range under all operating conditions to ensure proper regulation and protection functionality.

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

The ISL9003 series belongs to Intersil's family of low noise LDO regulators designed for portable applications. These devices are characterized by high PSRR and low output noise, making them ideal for RF and audio sections. The ISL9003IEFZ-T specifically denotes the 2.5V fixed output version in the SC-70-5 package. This part bridges the need for precision voltage regulation in compact mobile and handheld form factors.

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

Check for direct cross-references from Renesas or Intersil documentation. Similar parts in the ISL9003 family may offer different output voltages or packages. Verify pin compatibility and electrical specifications before substituting with other manufacturers' LDOs offering 150mA output.