ISL9011IRFCZ

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

The ISL9011IRFCZ is a dual low-dropout (LDO) linear regulator manufactured by Renesas Electronics Corporation. It provides two independent fixed output voltages: VO1 at 2.5V and VO2 at 1.8V. The device supports a maximum continuous output current of 150mA on Channel 1 and 300mA on Channel 2, with an input voltage range spanning from 2.3V to 6.5V. Key electrical specifications include a typical quiescent current of 45µA when both LDOs are active, a shutdown current below 0.1µA, and a power supply rejection ratio (PSRR) of 70dB at 1kHz. The unit operates within a temperature range of -40°C to +85°C and utilizes a 10-lead 3mm x 3mm Dual Flat No-Lead (DFN) package.

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 high PSRR for noise-sensitive applications.
• Includes integrated soft-start circuitry to limit input current surge during startup.
• Provides comprehensive protection against overcurrent conditions and thermal overload.

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 'IRFCZ' to confirm the exact output voltage combination of 2.5V and 1.8V. Confirm that the component is supplied in tube packaging as indicated by standard Intersil/Renesas DFN distribution practices. Ensure compatibility with RoHS3 compliance standards and verify the Moisture Sensitivity Level classification prior to soldering processes.

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

Select this component when a compact dual-output solution is required for portable electronics. The ISL9011IRFCZ is suitable for designs needing distinct voltage rails with minimal standby power draw. Verify that the application load requirements do not exceed 150mA for the first channel or 300mA for the second channel. Ensure the input voltage remains within the specified 2.3V to 6.5V operational window.

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

This part belongs to the ISL9011 family of dual LDO regulators designed for low-noise and low-power applications. Manufactured originally by Intersil and now under Renesas Electronics, these devices utilize a tiny 10-lead DFN package to save board space. The family offers various fixed voltage combinations, with the IRFCZ variant specifically configured for 2.5V and 1.8V outputs.

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

The datasheet explicitly states the device is pin compatible with the Micrel MIC2211. Verify functional equivalence regarding output currents and voltage accuracy before substitution.

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

What is the recommended capacitor value for the CBYP pin?

A 0.01µF capacitor is recommended for most high-performance applications to implement a 100Hz lowpass filter. For lowest noise applications, a 0.1µF or greater capacitor should be used.

How does the device handle simultaneous enable signals?

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