ISL9012IRJBZ-T

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

The ISL9012IRJBZ-T is a dual low-dropout linear regulator manufactured by Renesas Electronics Corporation. It provides two independent fixed output voltages: VO1 at 2.8V with a maximum continuous current of 150mA, and VO2 at 3.0V with a maximum continuous current of 300mA. The device operates within 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 high power supply rejection ratio (PSRR) of 70dB at 1kHz and low output noise of 30µVrms. The IC includes integrated Power-On Reset (POR) functionality for the VO2 channel, adjustable via an external capacitor on the CPOR pin. Protection mechanisms include thermal shutdown, overcurrent limiting, and undervoltage lockout (UVLO).

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

• Integrates two independent LDOs with separate enable pins for individual control.
• Includes a programmable Power-On Reset (POR) function for the second output channel.
• Features soft-start circuitry to limit input current surge during startup.
• Provides comprehensive protection against overcurrent, overheating, and undervoltage conditions.

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

• Portable instruments and handheld devices
• Cell phones and smart phones
• Medical handheld equipment

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

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific manufacturing lot codes if required for quality assurance. Review datasheet revision history for any updates to electrical characteristics or package dimensions prior to finalizing procurement specifications.

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

Select this component for applications requiring dual regulated supplies from a single input source. Ensure the load currents do not exceed 150mA for Channel 1 and 300mA for Channel 2. Verify that the input voltage remains within the 2.3V to 6.5V operating range. Consider the 10-lead DFN package size for space-constrained designs and confirm compatibility with the required output voltage tolerances.

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

This part belongs to the ISL9012 series of dual LDO regulators designed for low-noise and low-power applications. It is pin-compatible with certain Micrel MIC2212 variants. The device utilizes a 10-lead 3x3mm DFN package with an exposed pad for thermal management. It is suitable for battery-powered systems where efficiency and quiet operation are critical.

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

The datasheet lists ISL9000AIRNJZ, ISL9000AIRNFZ, ISL9000AIRMGZ-T, ISL9000AIRJBZ-T, and ISL9000AIRJNZ-T as recommended replacements for other ISL9012 variants. Direct substitution requires verification of matching output voltages and current ratings.

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

How is the POR delay time configured?

The POR delay time is externally programmed by connecting a timing capacitor between the CPOR pin and ground. A 0.01µF capacitor typically results in a 200ms entry delay.

What is the stability requirement for output capacitors?

The device is stable with ceramic output capacitors ranging from 1µF to 10µF, provided they have an Equivalent Series Resistance (ESR) of up to 200mΩ.

How does the device handle simultaneous enable signals?

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