ISL9011AIRLLZ

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

The ISL9011AIRLLZ is a dual low-dropout linear regulator manufactured by Renesas Electronics Corporation. It provides two fixed positive output voltages of 2.9V each, with maximum continuous output currents of 150mA for Channel 1 and 300mA for Channel 2. The device operates within an input voltage range of 2.3V to 6.5V and features a typical quiescent current of 45µA when both LDOs are active. It utilizes a 10-lead 3mm x 3mm DFN package and supports operation across a temperature range of -40°C to +85°C.

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

• Integrates two high-performance LDOs with separate enable pins for individual channel control.
• Features extremely low quiescent current consumption and soft-start functionality to limit input current surges during activation.
• Includes comprehensive protection mechanisms such as current limiting, thermal shutdown, and undervoltage lockout.
• Offers high power supply rejection ratio and low output noise, stabilized with ceramic capacitors.

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

• PDAs, Cell Phones and Smart Phones
• Portable Instruments and MP3 Players
• Handheld Devices including Medical Handhelds

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

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required voltage combination and packaging format. Check for RoHS compliance status and ensure the part meets environmental regulations relevant to your region before finalizing procurement.

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

Select this component for applications requiring dual independent regulated rails from a single source. Ensure the load current requirements do not exceed 150mA for the first channel and 300mA for the second. Verify that the input voltage remains within the specified operational limits and that the PCB layout accommodates the small DFN footprint for optimal thermal performance.

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

This device belongs to the ISL9011A series of dual LDO regulators designed for portable electronics. It is pin-compatible with the Micrel MIC2211, facilitating potential design swaps. The series is characterized by its compact size, low standby current, and ability to drive significant loads while maintaining stability with standard ceramic output capacitors.

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

Public confirmed substitute part number: MIC2211-OOYML-TR (Microchip Technology). Verify pin compatibility and electrical specifications against the original datasheet before implementation.

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

How does the ISL9011AIRLLZ manage startup sequences?

The device incorporates soft-start circuitry that limits the ramp-up rate to approximately 30µs/V to minimize input current surges. If both enable pins are asserted simultaneously, Channel 1 has priority and powers up first.

What is the function of the CBYP pin?

The CBYP pin serves as the reference bypass capacitor connection. Connecting a capacitor between this pin and ground allows users to tune the noise filter for improved low-noise and high PSRR performance in sensitive applications.