ISL9011IRMMZ

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

The ISL9011IRMMZ is a dual low-dropout linear regulator manufactured by Renesas Electronics Corporation, housed in a 10-lead 3mm x 3mm Dual Flat No-Lead (DFN) package. It provides two independent regulated outputs: Channel 1 delivers up to 150mA at a fixed 3.0V, while Channel 2 supplies up to 300mA at a fixed 3.0V. The device operates with an input voltage range of 2.3V to 6.5V and maintains a typical quiescent current of 45µA when both channels are active. It features high power supply rejection ratio (PSRR), low output noise, and separate enable pins for individual channel control.

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

• Integrates two independent LDOs with distinct current capabilities and separate enable controls
• Provides high PSRR and ultra-low output noise suitable for sensitive analog circuits
• Includes soft-start functionality to limit input current surges during startup
• Features integrated thermal shutdown and current limit protection

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

• Portable instruments and handheld devices
• Cell phones and smart phones
• MP3 players and PDAs

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

Verify the specific ordering suffix against manufacturer documentation to confirm exact pinout compatibility and package dimensions. Confirm RoHS compliance status and lead-free material specifications prior to integration. Ensure the selected variant matches the required fixed output voltages, as multiple combinations exist within the ISL9011 family.

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

Select this component when a compact dual-rail solution is required for portable electronics. The fixed 3.0V/3.0V configuration suits systems needing simultaneous power rails. Evaluate the 1µF to 10µF ceramic capacitor stability requirements and ensure the load current does not exceed 150mA for Channel 1 or 300mA for Channel 2.

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

The ISL9011 series consists of various fixed-output voltage combinations packaged in a tiny 10-lead DFN format. This specific part number represents one of the standard configurations offering symmetric 3.0V outputs on both channels. The series is designed for space-constrained applications requiring low standby current and high performance.

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

The datasheet explicitly states the device is pin-compatible with the Micrel MIC2211. Verify that the substitute component meets the same electrical specifications regarding dropout voltage, quiescent current, and output capacitance stability before implementation.

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

How is the reference bypass pin utilized?

The CBYP pin allows connection of an external capacitor (typically 0.01µF to 0.1µF) to ground. This capacitor tunes the noise filter, improving PSRR and reducing output noise for high-performance applications.

What happens if the input voltage drops below the UVLO threshold?

If the VIN voltage drops below approximately 1.8V, the device immediately disables both LDO outputs. Operation resumes automatically once VIN rises back above 2.1V, triggering the start-up sequence again.