S-8521B44MC-AUDT2U

Overview

The S-8521B44MC-AUDT2U is a step-down switching regulator controller from ABLIC, designed for efficient DC-DC conversion. It operates with an input voltage range of 2.5V to 16V and delivers a fixed output voltage of 4.4V. The device features a typical quiescent current of 100µA and supports a switching frequency of 300kHz. Packaged in a compact SOT-23-5 format, it is suitable for space-constrained portable electronics requiring stable power management.

Feature Summary

• Integrated PWM control for efficient step-down voltage regulation
• Low quiescent current consumption for extended battery life
• Fixed output voltage configuration simplifies external component selection

Applications

• Portable consumer electronics
• Battery-powered devices
• General-purpose power supply circuits

Procurement Notes

Verify the exact suffix against official ABLIC documentation to confirm pinout and electrical specifications. Confirm availability status as distribution channels may vary. Ensure compatibility with your PCB footprint and thermal requirements before finalizing procurement decisions.

Selection Notes

Select this component when a fixed 4.4V output is required from a 2.5V to 16V input range. Consider the 300kHz switching frequency for balancing efficiency and external component size. Verify that the SOT-23-5 package meets your board layout constraints and thermal dissipation needs.

Part Context

This part belongs to the S-8521 series of step-down switching regulators by ABLIC. These controllers are engineered for high efficiency and low power consumption in portable applications. The series typically offers fixed output voltages to reduce design complexity and external component count.

Replacement Considerations

Check ABLIC datasheets for other S-8521 variants with different output voltages or packaging options. Cross-reference with similar step-down controllers from other manufacturers if supply chain constraints exist, ensuring equivalent electrical parameters and pin compatibility.