ISL9021AIINZ-T

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

The ISL9021AIINZ-T is a fixed-output low-dropout linear regulator manufactured by Renesas Electronics Corporation. It provides a stable 3.3 V output with a maximum continuous current of 1 A. The device operates within an input voltage range of 1.5 V to 5.5 V and features a typical dropout voltage of 150 mV, with a maximum rating of 250 mV. It maintains a voltage regulation accuracy of 0.8% and functions reliably across an operating temperature range from -40°C to +85°C. The component utilizes a WLCSP-4 surface-mount package.

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

• Delivers high-performance power regulation with low noise characteristics and high power supply rejection ratio (PSRR).
• Incorporates comprehensive protection mechanisms including overcurrent limiting, thermal shutdown, reverse polarity prevention, short-circuit protection, and soft-start functionality.
• Ensures stable operation with small ceramic output capacitors ranging from 1 µF to 4.7 µF.

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

• Portable battery-powered electronic devices requiring efficient power management.
• Embedded systems utilizing microcontrollers or digital signal processors.
• Communication equipment needing clean power supplies for sensitive analog sections.

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

Verify the specific suffix and package type against official datasheets before procurement, as variations exist within the series. Confirm end-of-life status and availability through authorized distributors, as this component may be discontinued. Ensure compatibility with existing PCB footprints and thermal requirements during the sourcing process.

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

Select this regulator when a fixed 3.3 V output at up to 1 A is required in a compact footprint. Consider the WLCSP-4 package for space-constrained designs. Evaluate the input voltage range and dropout characteristics against the system's power rail specifications to ensure optimal efficiency under varying load conditions.

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

This component belongs to the ISL9021A series of single LDO regulators designed for low-voltage applications. The series offers various fixed output voltages and packages, including WLCSP and µTDFN options. It is engineered for portable electronics where low quiescent current and high PSRR are critical for maintaining signal integrity and extending battery life.

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

Consult official manufacturer documentation for verified substitute part numbers. Cross-reference pinouts, electrical parameters, and package dimensions to ensure functional equivalence. Verify that any alternative component meets the same thermal and regulatory compliance standards.