ISL9012IRLLZ-T

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

The ISL9012IRLLZ-T is a dual low-dropout linear regulator manufactured by Renesas Electronics Corporation, housed in a 10-lead 3x3mm DFN package. It provides two independent positive fixed outputs: Channel 1 delivers up to 150mA, and Channel 2 delivers up to 300mA. The device operates with an input voltage range of 2.3V to 6.5V and maintains a typical quiescent current of 45µA when both LDOs are active. It features a shutdown mode drawing less than 0.1µA, a programmable Power-On Reset (POR) for the VO2 output, and separate enable pins for each channel.

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

• Integrates two high-performance LDOs with distinct current capabilities of 150mA and 300mA.
• Features extremely low quiescent current consumption and a deep shutdown mode for power efficiency.
• Includes a programmable Power-On Reset (POR) function for the second output channel.
• Provides individual enable control for each LDO output alongside soft-start and thermal protection.

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 output voltage configuration required for the ISL9012IRLLZ-T variant against official datasheets, as suffixes determine fixed voltage pairs. Confirm availability status through authorized distributors, as this component may be subject to limited supply or end-of-life transitions. Ensure compliance with RoHS standards and verify MSL ratings for surface mount assembly processes.

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

Select this component for applications requiring dual regulated rails from a single source with minimal standby power draw. The device is suitable for noise-sensitive circuits due to its high PSRR and low output noise characteristics. Verify that the load requirements do not exceed 150mA for the first channel or 300mA for the second channel. Ensure compatibility with the 1µF to 10µF ceramic output capacitor range for stability.

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 is pin-compatible with the Micrel MIC2212, facilitating direct upgrades or replacements in existing designs. The series emphasizes low noise and high power supply rejection ratio performance within a compact footprint.

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

Official documentation lists the ISL9000AIRNJZ, ISL9000AIRNFZ, ISL9000AIRMGZ-T, ISL9000AIRJBZ-T, and ISL9000AIRJNZ-T as recommended replacements for discontinued variants within the ISL9012 family.

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

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

The POR delay for the VO2 output is externally programmed by connecting a timing capacitor to the CPOR pin. A standard value of 0.01µF yields approximately a 200ms delay.

What is the maximum allowable output capacitance for stability?

The device is stable with output capacitance ranging from 1µF to 10µF, provided the equivalent series resistance (ESR) is up to 200mΩ.

How does the device handle simultaneous enable signals?

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