ISL9003IEJZ-T

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

The ISL9003IEJZ-T is a single-channel low-dropout (LDO) voltage regulator manufactured by Intersil. It provides a fixed output voltage of 1.8 V with a maximum continuous load current of 150 mA. The device operates within an input voltage range of 2.3 V to 6.5 V and features a typical dropout voltage of 200 mV at full load. It incorporates a shutdown pin that reduces standby current to a maximum of 1 µA. The component is housed in a 5-lead SC-70 package and is rated for operation from -40°C to +85°C.

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

• Extremely low quiescent current consumption of 31 µA during normal operation
• High power supply rejection ratio exceeding 90 dB at 1 kHz
• Integrated thermal overload protection and current limiting circuitry
• Stable performance with small ceramic output capacitors ranging from 1 µF to 4.7 µF

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

• Portable electronic devices such as PDAs and smartphones
• Handheld medical instruments requiring low noise power supplies
• MP3 players and other portable audio equipment
• Battery-powered systems prioritizing extended operational life

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

Verify the specific suffix JEJZ against official Renesas or Intersil documentation to confirm package type and temperature grade. Confirm availability status as legacy components may have limited stock or end-of-life restrictions. Ensure compatibility with existing PCB footprints for the SC-70-5 package before finalizing procurement orders.

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

Select this component when designing circuits requiring ultra-low noise and high PSRR for sensitive analog sections. The fixed 1.8 V output suits digital logic cores and RF modules. Verify that the required load current does not exceed 150 mA and that the input voltage remains within the specified 2.3 V to 6.5 V window for optimal regulation.

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

This part belongs to the ISL9003A series of low-noise LDO regulators designed for portable applications. It shares architectural similarities with other members of the family but differs in output voltage and package configuration. The series emphasizes low power consumption and stability with modern ceramic capacitors, addressing the needs of battery-operated consumer electronics.

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

Consult official substitution guides for equivalent parts with matching 150 mA current ratings and 1.8 V fixed outputs. Verify pin compatibility for the SC-70-5 package if replacing on existing boards. Ensure replacement devices offer comparable PSRR and noise specifications to maintain system performance integrity.