ISL9011IRJNZ-T

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

The ISL9011IRJNZ-T is a dual low-dropout (LDO) linear regulator manufactured by Renesas Electronics Corporation. It integrates two independent LDO channels within a 10-lead, 3mm x 3mm Dual Flat No-Lead (DFN) package. Channel 1 provides a fixed output voltage of 2.8V with a maximum continuous current capability of 150mA. Channel 2 delivers a fixed output voltage of 3.3V with a maximum continuous current capability of 300mA. The device operates over an input supply voltage range of 2.3V to 6.5V and supports an ambient operating temperature range from -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 circuitry to limit input current surges during activation.
• Includes comprehensive protection mechanisms such as thermal shutdown, current limiting, and undervoltage lockout.
• Designed for stability with ceramic output capacitors ranging from 1µF to 10µF.

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 the specific ordering suffix '-T' indicates tape and reel packaging configuration. Confirm that the 'Z' suffix denotes lead-free (RoHS compliant) material sets. Ensure the base part number matches the required voltage combination of 2.8V and 3.3V. Check manufacturer documentation for any product change notices or end-of-life status updates prior to finalizing procurement plans.

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

Select this component when a compact dual-rail power solution is required for portable electronics. The device offers distinct current ratings for each channel, accommodating different load requirements. Verify that the application utilizes ceramic output capacitors between 1µF and 10µF to ensure stability. Consider the separate enable pins if independent sequencing or power management of the two rails is necessary.

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

This component belongs to the ISL9011 series of dual LDO regulators designed for low noise and high power supply rejection ratio (PSRR) applications. The series is characterized by its tiny 10-lead DFN footprint and compatibility with standard surface-mount assembly processes. It serves as a pin-compatible alternative to other industry-standard dual LDOs in mobile and handheld device designs.

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

The datasheet explicitly states the device is pin compatible with the Micrel MIC2211. Designers should verify electrical specifications and pin assignments against the MIC2211 datasheet before substitution. Other variants within the ISL9011 family may offer different fixed output voltage combinations but share the same package and functional architecture.

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

How does the device manage startup sequences when both enable pins are asserted?

If both EN1 and EN2 are brought high simultaneously, the VO1 output has priority and powers up first. If one pin is asserted before the other stabilizes, the device delays the second turn-on until the first output reaches its target level.

What is the function of the CBYP pin?

The CBYP pin is the reference bypass capacitor pin. Connecting a capacitor between this pin and ground allows tuning of the noise filter for low noise and high PSRR performance.