ISL9123IINZ-T

Voltage Regulators - DC DC Switching Regulators Overview

The ISL9123IINZ-T is an ultra-low quiescent current buck switching regulator IC manufactured by Renesas Electronics Corporation. It operates with an input voltage range of 1.8V to 5.5V and provides a positive, adjustable output voltage from 0.4V to 5.375V. The device delivers a maximum output current of 600mA and integrates synchronous rectification for high efficiency. It functions at a fixed switching frequency of 2.5MHz and supports operation across an ambient temperature range of -40°C to +85°C. The component is housed in an 8-WLCSP (1.8x1mm) package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Ultra-low quiescent current design optimized for battery-powered applications
• Integrated bypass mode allows direct connection from input to output for minimal loss
• Highly integrated synchronous buck topology reduces external component count
• Adjustable output voltage capability down to 0.4V for low-power logic supplies

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring extended battery life
• IoT devices with strict power consumption constraints
• Mobile communication equipment
• Wearable health monitoring devices

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the 'I' grade corresponds to industrial temperature ratings (-40°C to +85°C). Ensure compatibility with 8-WLCSP footprint dimensions during PCB layout. Check for RoHS3 compliance status if required by regional regulations. Validate that the 600mA output current meets system peak load requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when ultra-low standby current is critical compared to standard buck regulators. Consider the integrated bypass feature if input-output differential voltage is frequently minimal. Evaluate the 2.5MHz switching frequency against EMI sensitivity in the target application. Compare the 8-WLCSP package size against available board space constraints. Ensure the 0.4V minimum output voltage aligns with downstream load requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

The ISL9123 belongs to Renesas' ultra-low IQ regulator family, designed specifically for energy-efficient portable systems. It complements other ISL912x series parts by offering a dedicated bypass function not present in all variants. The device represents Intersil's legacy technology now managed under Renesas Electronics, maintaining compatibility with established designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

ISL9122AIINZ-T7A is documented as a parameter-equivalent substitute. Verify functional equivalence regarding bypass mode availability and output current capabilities before substitution.