ISL9021AIRUWZ-T

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

The ISL9021AIRUWZ-T is a fixed-output linear low-dropout (LDO) voltage regulator manufactured by Renesas Electronics. It provides a fixed output voltage of 1.2V with a maximum continuous output current of 250mA. The device supports an input voltage range up to 5.5V and operates within a junction temperature range of -40°C to +85°C. Key electrical characteristics include a typical quiescent current of 50µA, a maximum dropout voltage of 0.25V at full load, and high power supply rejection ratio performance. The component is housed in a compact 6-UTDFN package measuring 1.6x1.6mm.

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

• Integrated programmable current limiting capability for enhanced protection
• Low quiescent current consumption for improved system efficiency
• High power supply rejection ratio across frequency ranges
• Compact surface-mount packaging for space-constrained designs

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

• Portable battery-powered electronic devices
• Embedded systems requiring stable low-voltage rails
• IoT sensor nodes and modules
• Communication equipment power management

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

Verify the specific suffix 'W' against official Renesas documentation to confirm the exact output voltage variant, as suffixes often denote specific voltage codes or tape-and-reel configurations. Confirm RoHS compliance status and lead times through authorized distributors, noting that availability may vary due to lifecycle status. Ensure the ordering part number matches the required package type and output specification before procurement.

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

Select this component when a stable 1.2V rail is required from inputs up to 5.5V with minimal footprint. Consider the 250mA output limit and 50µA quiescent current for battery life optimization. Evaluate thermal dissipation requirements based on the input-output differential and load current within the -40°C to +85°C operating range. Verify compatibility with external capacitor requirements for stability and transient response.

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

This part belongs to the ISL9021 series of low-dropout regulators designed for efficient power management in portable applications. The series offers various fixed output voltages and packages, providing designers with flexible options for different voltage rails. The ISL9021AIRUWZ-T specifically targets applications needing a 1.2V output in a small form factor.

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

Check for direct pin-compatible alternatives within the ISL9021 family with different voltage suffixes if the 1.2V output is incorrect. Verify equivalent LDOs from other manufacturers ensuring matching output current, dropout voltage, and package dimensions. Cross-reference datasheets for quiescent current and PSRR specifications to ensure functional parity.