ISL9003IEKZ-T

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

The ISL9003IEKZ-T is a single-output fixed low-dropout (LDO) linear regulator 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 under-voltage 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

• Integrates comprehensive protection mechanisms including overcurrent limiting, thermal shutdown, soft-start functionality, and under-voltage lockout for robust system operation.
• Features a dedicated enable pin that controls the regulator state, allowing for effective power management and reduced standby consumption.
• Designed for stability with small ceramic output capacitors, supporting MLCC types with equivalent series resistance up to 200mΩ.

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

• Portable electronic devices such as PDAs and smart phones
• Handheld medical instruments and diagnostic equipment
• Battery-powered consumer electronics requiring efficient power regulation

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

Verify the specific suffix 'K' against official Intersil documentation to confirm package type and tape/reel specifications. Ensure compatibility with RoHS compliance standards required for your manufacturing process. Cross-reference the manufacturer part number with Renesas Electronics records, as Intersil assets have been acquired. Confirm lead times and availability status directly with authorized distributors or the manufacturer 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 moderate current demands up to 150mA. It is suitable for applications prioritizing low quiescent current and compact footprint via the SC-70-5 package. Consider the 0.4V dropout voltage relative to the minimum input voltage to ensure proper regulation under all load conditions. Evaluate the need for enable control and built-in protection features against alternative discrete solutions.

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

The ISL9003 series belongs to Intersil's portfolio of low-noise LDO regulators designed for portable applications. These devices emphasize high power supply rejection ratio (PSRR) and low output noise to support sensitive analog circuits. The ISL9003 variant specifically offers a fixed output configuration, distinguishing it from adjustable versions within the same family. This line targets markets demanding high performance in minimal space constraints.

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

Publicly confirmed substitute part numbers are not available in the provided source material. Verify functional equivalence with other Intersil/Renesas LDOs offering similar voltage, current, and package specifications if direct replacement is necessary.