S-8521B44MC-AUDT2G

Overview

The S-8521B44MC-AUDT2G is a synchronous rectification switching regulator (DC-DC converter) manufactured by ABLIC Inc. It belongs to the S-8521 series, designed for high-efficiency power management in compact electronic devices. The component operates with an input voltage range of 2.5 V to 16 V and provides a fixed output voltage of 4.4 V. It features a maximum output current capability of 1 A and utilizes a COT (Constant On-Time) control method to ensure stable performance under varying load conditions. The device is housed in a small SC-74A (SOT-753) surface-mount package, suitable for space-constrained applications. It supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates synchronous rectification technology for enhanced conversion efficiency compared to standard diode-based rectification.
• Employs Constant On-Time (COT) control architecture to maintain rapid transient response and stable regulation across wide load variations.
• Features a highly compact SC-74A (SOT-753) package footprint, facilitating dense PCB layout designs.
• Includes built-in protection mechanisms such as over-current protection and thermal shutdown to ensure operational safety.

Applications

• Portable consumer electronics requiring efficient battery-powered operation
• Industrial equipment control boards needing stable 4.4 V logic supply
• Automotive infotainment systems utilizing compact power management solutions
• IoT devices and sensor nodes with strict size and power constraints

Procurement Notes

Verify the specific suffix 'AUDT2G' against the manufacturer's latest datasheet to confirm pinout compatibility and tape-and-reel specifications. Ensure that the required output voltage of 4.4 V aligns precisely with the target circuit design before finalizing procurement orders. Cross-reference the package marking code to distinguish this variant from other fixed-voltage options within the S-8521 series family.

Selection Notes

Select this component when a fixed 4.4 V output is required with up to 1 A current capacity in a minimal footprint. It is appropriate for designs prioritizing efficiency through synchronous rectification without the complexity of adjustable feedback networks. Consider the input voltage range of 2.5 V to 16 V to ensure compatibility with the system's power source, whether it be a single-cell lithium battery or a higher voltage rail.

Part Context

The S-8521B44MC-AUDT2G is part of ABLIC's S-8521 series of synchronous buck converters. This series is engineered to provide high efficiency and compactness for modern portable and industrial applications. The B44 designation indicates the specific fixed output voltage setting, while the MC suffix typically refers to the package type and temperature grade. It complements the broader PMIC portfolio by offering a ready-to-use solution for common voltage rails.

Replacement Considerations

Direct replacements may include other S-8521 series variants with different fixed output voltages if the voltage requirement changes, provided the current and package specifications remain compatible. Verify pin-to-pin compatibility with alternative manufacturers' synchronous buck regulators offering similar 1 A output and COT control characteristics.