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ISL9021AIIWZ-T is listed in the Voltage Regulators - Linear, Low Drop Out (LDO) Regulators range at ChipApex. The manufacturer field lists Renesas Electronics Corporation. Its product description is IC REG LINEAR 1.2V 250MA 4-WLCSP. Review the specifications below when checking this part for your BOM.
The ISL9021AIIWZ-T is a fixed-output linear voltage regulator (LDO) manufactured by Renesas Electronics. It provides a fixed output voltage of 1.2V with a maximum continuous load current of 250mA. The device operates within an input voltage range of 1.5V to 5.5V and features a typical dropout voltage of 250mV at full load. It includes protection mechanisms such as overcurrent, thermal shutdown, reverse polarity, and soft-start capabilities. The component is housed in a compact 6-UTDFN package measuring 1.6x1.6mm.
Verify the specific suffix 'IIWZ' against official Renesas documentation to confirm the 1.2V fixed output variant. Confirm package type is 6-UTDFN. Check for end-of-life status or obsolescence notices prior to procurement planning.
Select this component when a stable 1.2V rail is required from a single-cell lithium battery or similar source. Ensure input voltage remains above 1.5V. Consider the 250mA limit for load requirements. Verify compatibility with the 6-UTDFN footprint during PCB layout.
This part belongs to the ISL9021A series of low-dropout regulators designed for portable applications. It shares family characteristics such as high PSRR and low quiescent current but differs in output voltage and package options compared to other variants like the 1A WLCSP versions.
Direct substitutes include other ISL9021A variants with different output voltages if adjustable, or equivalent 250mA LDOs in 6-UTDFN packages. Verify pinout compatibility and thermal performance before substitution.
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