ISL9012IRLLZ

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

The ISL9012IRLLZ is a dual low dropout linear regulator manufactured by Renesas Electronics Corporation. It integrates two independent LDO channels, providing a continuous output current of 150mA for Channel 1 and 300mA for Channel 2. The device operates with an input voltage range from 2.3V to 6.5V and features extremely low quiescent current consumption of typically 45µA when both LDOs are active. It includes separate enable pins for individual channel control, a programmable Power-On Reset (POR) function for the VO2 output, and comprehensive protection mechanisms including thermal shutdown and current limiting.

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

• Integrates two high-performance LDOs with distinct current capabilities of 150mA and 300mA.
• Features a programmable Power-On Reset (POR) delay for the second output channel via an external capacitor.
• Includes separate enable pins allowing independent control of each LDO output.
• Provides excellent transient response and load regulation across the full operating temperature range.

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 suffix 'IRLLZ' against official manufacturer documentation, as standard datasheets list variants such as IRNNZ or IRCJZ. Confirm RoHS compliance status and package availability directly with authorized distributors. Ensure that the required output voltage combination matches available factory-trimmed options within the 1.5V to 3.3V range.

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

Select this component for applications requiring dual fixed voltage rails in a compact footprint. Consider the 10-lead 3x3mm DFN package for space-constrained designs. Evaluate the need for the POR feature on Channel 2 and ensure appropriate timing capacitors are included in the design. Verify stability requirements regarding output capacitance values between 1µF and 10µF.

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

The ISL9012 belongs to the Intersil/Renesas family of dual LDO regulators designed for portable electronics. It shares functional similarities with other models like the ISL9011 but offers specific current ratings and integrated POR logic. The device is pin-compatible with certain competitors like the Micrel MIC2212, facilitating potential design swaps while maintaining the same 10-lead DFN form factor.

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

Official datasheet notes recommend the ISL9000AIRNJZ, ISL9000AIRNFZ, ISL9000AIRMGZ-T, and ISL9000AIRJBZ-T as replacements for specific obsolete ISL9012 variants. Verify electrical compatibility and pinout alignment before substituting these recommended parts.

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

How is the Power-On Reset (POR) delay time determined?

The POR delay time for the VO2 output is externally programmed by connecting a timing capacitor to the CPOR pin. For example, a 0.01µF capacitor results in approximately a 200ms entry delay.

What is the recommended output capacitance range for stability?

The device is stable with ceramic output capacitors ranging from 1µF to 10µF, provided they have an Equivalent Series Resistance (ESR) of up to 200mΩ.

Can the two LDO outputs be enabled independently?

Yes, the ISL9012 features separate enable pins (EN1 and EN2) that allow individual control over each LDO output channel.