ISL9011IRNJZ

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

The ISL9011IRNJZ is a dual low-dropout linear regulator manufactured by Renesas Electronics Corporation. It integrates two independent LDO channels within a compact 10-lead, 3mm x 3mm Dual Flat No-Lead (DFN) package. Channel 1 provides a fixed 3.3V output capable of sourcing up to 150mA, while Channel 2 delivers a fixed 2.8V output with a continuous current capacity of 300mA. The device operates over an input voltage range of 2.3V to 6.5V and maintains a typical quiescent current of 45µA when both regulators are active. It features ±1.8% output voltage accuracy across the full operating temperature range of -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 power control
• Features extremely low quiescent current consumption and ultra-low shutdown current
• Includes integrated soft-start circuitry to limit input current surge during turn-on
• Provides comprehensive protection against thermal overload and output short circuits

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

• Powering portable instruments and MP3 players
• Supplying logic rails in PDAs, cell phones, and smart phones
• Providing regulated voltage for handheld medical devices

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

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance and Pb-free status using official documentation. Check for specific manufacturing lot codes and date codes to ensure alignment with project timelines. Validate that the package marking matches the ordering information provided in the datasheet.

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

Select this component when a dual-output solution is required within a minimal footprint. Ensure the application demands a 3.3V rail at 150mA and a 2.8V rail at 300mA. Verify that the system input voltage remains between 2.3V and 6.5V. Consider the CBYP pin requirements if optimizing for specific noise performance levels.

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

This part belongs to the ISL9011 series of dual LDO regulators designed for battery-powered applications. It succeeds earlier Intersil designs and is pin-compatible with certain Micrel MIC2211 variants. The series focuses on minimizing standby power while maintaining stability with small ceramic capacitors.

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

ISL9011AIRNJZ

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

How does the ISL9011 handle simultaneous enable signals?

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

What is the recommended capacitor value for the CBYP pin?

A 0.01µF capacitor is recommended for most high-performance applications. For lowest noise operation, a 0.1µF or greater capacitor should be used to filter reference noise below the 10Hz to 1kHz band.