ISL9021AIIBZ-T

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

The ISL9021AIIBZ-T is a fixed-output low-dropout (LDO) linear voltage regulator manufactured by Renesas Electronics Corporation. It provides a fixed output voltage of 1.5 V with a maximum continuous output current of 1 A. The device operates within an input voltage range of 1.5 V to 5.5 V and maintains a typical dropout voltage of 150 mV at full load, with a maximum specified dropout of 250 mV. It features high power supply rejection ratio (PSRR) and low noise characteristics suitable for sensitive analog circuits. The regulator includes comprehensive protection mechanisms such as overcurrent, thermal shutdown, reverse polarity, and short-circuit protection. It is housed in a compact WLCSP-4 package and is rated for operation over an extended temperature range from -40°C to +85°C.

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

• High PSRR and low noise performance for clean power delivery
• Integrated reverse current protection prevents backflow
• Comprehensive protection against overcurrent, thermal overload, and short circuits

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

• Portable battery-powered electronic devices
• RF and wireless communication modules
• Low-noise sensor power supplies

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

Verify component authenticity through authorized channels due to end-of-life status. Confirm RoHS compliance and specific lot traceability requirements before integration. Check for alternative sourcing options as standard distribution may be limited.

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

Select this component when a stable 1.5 V rail is required with minimal footprint. Ensure input voltage remains above the minimum threshold while accounting for load-induced dropout. Verify that the WLCSP-4 package fits the PCB layout constraints.

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

This part belongs to the ISL9021A series of single LDO regulators designed for ultra-low noise and high PSRR applications. The series offers various fixed output voltages and packages, including WLCSP and µTDFN options, catering to space-constrained portable electronics.

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

Consult official datasheets for pin-compatible alternatives within the ISL9021 family or newer Renesas LDO generations. Verify electrical parameter equivalence for output voltage, current rating, and package dimensions.