ISL9021AIRUNZ-T

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

The ISL9021AIRUNZ-T is a single-output fixed positive linear low-dropout (LDO) voltage regulator manufactured by Renesas Electronics. It provides a nominal output voltage of 3.3V with a maximum continuous load current capability of 250mA. The device operates within an input voltage range of 1.5V to 5.5V and features a typical dropout voltage of 0.25V at full load. It incorporates comprehensive protection mechanisms including overcurrent, thermal shutdown, reverse polarity, short-circuit, and soft-start functionality.

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

• Integrated reverse current protection feature specifically designed for the 6-lead µTDFN package configuration
• Capable of maintaining stability with output capacitance values ranging from 1µF to 4.7µF
• Includes built-in soft-start circuitry to limit inrush current during power-up sequences

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

• Portable battery-powered electronic devices requiring efficient power regulation
• Embedded systems utilizing microcontrollers or digital logic circuits
• Communication equipment modules needing stable supply rails

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

Verify component authenticity through authorized channels as this part number may be subject to obsolescence notices. Confirm that the specific package marking matches the manufacturer's official datasheet specifications. Ensure compliance with RoHS directives and check for any recent product change notifications regarding manufacturing origin or material composition updates prior to final procurement authorization.

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

Select this regulator when a fixed 3.3V rail is required with moderate current demands up to 250mA. It is suitable for designs prioritizing low quiescent current consumption and high power supply rejection ratio performance. Consider the 6-UTDFN footprint constraints and ensure adequate thermal management solutions are implemented on the printed circuit board to handle dissipated power under maximum load conditions.

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

This component belongs to the ISL9021A series of low-noise, high-PSRR LDO regulators. The series offers various fixed output voltage options while maintaining consistent electrical characteristics across the family. It represents a legacy product line originally developed by Intersil before its acquisition by Renesas Electronics Corporation.

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

Consult official cross-reference lists for direct pin-compatible alternatives such as the ISL9021AIINZ-T or ISL9021AIRUMZ-T variants. Verify that substitute components maintain identical output voltage tolerances and package dimensions to ensure seamless integration without redesigning the host application circuit.