ISL9123IICZ-T

Voltage Regulators - DC DC Switching Regulators Overview

The ISL9123IICZ-T is a highly integrated buck switching regulator from Renesas Electronics Corporation, packaged in an 8-UFBGA (WLCSP) format. It provides a positive adjustable output voltage ranging from 0.4V to the input supply level, with a maximum output current of 600mA. The device operates within an input voltage range of 1.8V to 5.5V and supports an operating temperature range of -40°C to 85°C. Key electrical characteristics include a quiescent current of 950nA in regulation mode, 140nA in forced bypass mode, and 7nA in shutdown mode.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Ultra-low quiescent current consumption across regulation, bypass, and shutdown modes for extended battery life
• Integrated bypass function allowing direct connection between input and output when switching is disabled
• Highly integrated design reducing external component count and board space requirements
• Capable of supplying low output voltages down to 0.4V for modern low-power digital loads

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered portable electronics requiring minimal standby power drain
• IoT devices and sensors needing efficient step-down conversion from single-cell lithium batteries
• Mobile communication equipment utilizing low-voltage logic supplies
• Consumer gadgets where small form factor WLCSP packaging is critical

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'IICZ-T' against the manufacturer's latest datasheet to confirm package type and tape-and-reel specifications. Check for any Product Change Notices (PCNs) affecting this part number, as Renesas has issued notices impacting related ISL9123 variants. Ensure compatibility with your PCB footprint for the 8-bump WLCSP configuration before ordering.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when ultra-low static current is prioritized over high efficiency at heavy loads. It is suitable for applications where the input voltage remains relatively stable above 1.8V. Consider the 600mA current limit for load requirements. Compare with ISL9123A or ISL9123B if different thermal or performance characteristics are needed, though these may share similar core features.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the ISL9123 family of ultra-low IQ buck regulators, originally developed by Intersil and now managed by Renesas Electronics. The family includes variants like ISL9123A and ISL9123B, which offer similar functionality but may differ in specific electrical parameters or packaging options. These regulators are designed for portable applications demanding high efficiency in light-load conditions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include ISL9123A and ISL9123B, provided pinout and functional compatibility are verified. Check for updated part numbers such as RAA2123xx series equivalents if available in Renesas's current portfolio. Ensure any replacement maintains the 8-WLCSP package dimensions for mechanical fit.