ISL9011IRJNZ

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

The ISL9011IRJNZ is a dual low-dropout linear regulator manufactured by Renesas Electronics Corporation, housed in a 10-lead 3mm x 3mm DFN package. It provides two independent positive fixed outputs: Channel 1 delivers 2.8V at up to 150mA, while Channel 2 supplies 3.3V at 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 channels are active. It features ±1.8% output accuracy, high power supply rejection ratio (70dB at 1kHz), and low output noise.

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

• Integrates two independent LDOs with separate enable pins for individual control
• Provides extremely low standby current consumption during shutdown mode
• Includes integrated soft-start circuitry to limit input current surge during activation
• Features thermal shutdown and current limit protection mechanisms

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

• Portable instruments and MP3 players
• Smartphones and cellular phones
• Medical handheld devices

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

Verify the specific ordering suffix against the manufacturer's official documentation to confirm exact output voltages and package variations. Confirm RoHS compliance status and lead-free material specifications prior to procurement. Check for any product change notices or end-of-life announcements that may affect long-term availability.

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

Select this component for applications requiring dual regulated rails from a single source within a compact footprint. Ensure the input voltage remains within the specified 2.3V to 6.5V range. Verify that the required load currents do not exceed the 150mA and 300mA limits for Channels 1 and 2 respectively. Consider the thermal performance characteristics given the small DFN package size.

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

This part belongs to the ISL9011 series of dual LDO regulators designed for portable electronics. It is pin-compatible with certain Micrel MIC2211 variants. The series offers various fixed voltage combinations to suit different system requirements while maintaining consistent performance metrics across the family.

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

ISL9011AIRJNZ

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

How does the device manage startup sequences when both enable pins are asserted?

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

What is the function of the CBYP pin?

The CBYP pin allows connection of an external capacitor to tune noise filter performance. A 0.01µF capacitor implements a 100Hz lowpass filter, while larger values like 0.1µF reduce reference noise below the 10Hz to 1kHz band for sensitive applications.