ISL9011IRBLZ

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

The ISL9011IRBLZ is a dual low-dropout (LDO) linear voltage regulator manufactured by Intersil, now part of Renesas. It features two independent output channels capable of sourcing 150 mA from Channel 1 and 300 mA from Channel 2. The device operates with an input voltage range of 2.3 V to 6.5 V and provides fixed output voltages, specifically 1.5 V and 2.9 V for this suffix variant. It is housed in a compact 10-lead DFN (3x3 mm) package. Key electrical characteristics include a typical quiescent current of 45 µA, high power supply rejection ratio (PSRR), and stability with output capacitance between 1 µF and 10 µF.

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

• Dual-channel architecture providing independent regulation with distinct current capabilities per channel.
• Low noise performance enhanced by a dedicated reference bypass pin for external filtering.
• High power supply rejection ratio (PSRR) suitable for sensitive analog and RF applications.
• Integrated protection mechanisms including over-current, over-temperature, and soft-start functionality.

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

• Portable electronic devices requiring multiple stable voltage rails from a single source.
• RF front-end modules needing low-noise power supplies for oscillators and amplifiers.
• Embedded systems utilizing microcontrollers and memory components with specific voltage requirements.
• Battery-powered equipment benefiting from low standby current consumption.

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

Verify the exact output voltage combination against the datasheet, as suffixes like BLZ denote specific fixed outputs (e.g., 1.5V/2.9V). Confirm the package type is 10-DFN (3x3 mm) and check for RoHS compliance status. Ensure the design accounts for the thermal dissipation limits within the exposed pad DFN footprint. Cross-reference the manufacturer's latest documentation for any obsolescence notices or recommended replacement parts.

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

Select this component when dual isolated rails are required from a single LDO structure to save board space. It is appropriate for designs where low quiescent current is critical for battery life. The device requires output capacitors within the 1 µF to 10 µF range with ESR up to 200 mΩ for stability. Consider the thermal performance if operating near maximum load currents, as the small DFN package has limited heat dissipation capability compared to larger packages.

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

The ISL9011 belongs to the Intersil/Renesas portfolio of high-performance power management integrated circuits. This series is designed for portable applications demanding efficiency and low noise. The ISL9011IRBLZ specifically represents a fixed-output variant within the broader ISL9011 family, which may also include adjustable versions. The integration of dual regulators into a single 10-lead package highlights the trend toward miniaturization in modern consumer electronics and industrial control systems.

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

What is the maximum output current for each channel?

Channel 1 can source up to 150 mA, while Channel 2 can source up to 300 mA.

How does the device achieve low noise performance?

It includes a reference bypass pin that allows an external capacitor to be connected, enabling users to adjust the noise filter for low noise and high PSRR applications.

What is the required output capacitance range for stability?

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