S-8521B50MC-AUJT2U

Overview

The S-8521B50MC-AUJT2U is a synchronous rectification step-down switching regulator manufactured by ABLIC Inc. It operates with an input voltage range of 2.5V to 16V and provides a fixed output voltage of 5.0V. The device supports a maximum output current of 1A and features a switch frequency of 1.2MHz. It includes built-in protection mechanisms such as overcurrent protection, thermal shutdown, and under-voltage lockout. The component is housed in a compact SOT-23-5 package and is rated for an operating temperature range from -40°C to +85°C.

Feature Summary

• Synchronous rectification topology for high efficiency
• Built-in overcurrent and thermal protection circuits
• Compact SOT-23-5 surface mount package

Applications

• Portable electronic devices requiring efficient power management
• Battery-powered equipment needing stable 5V regulation
• Industrial control systems utilizing DC-DC conversion

Procurement Notes

Verify the specific suffix AUJT2U against the official ABLIC datasheet to confirm pinout and electrical characteristics. Ensure compatibility with your PCB footprint and thermal requirements. Check for RoHS compliance status and availability through authorized distributors. Confirm lead times and minimum order quantities directly with suppliers before placing orders.

Selection Notes

Select this component when a 1A synchronous buck converter is required in a small footprint. The 1.2MHz switching frequency allows for smaller external inductors and capacitors compared to lower-frequency alternatives. Verify that the 5.0V fixed output meets system voltage rails. Consider the -40°C to +85°C industrial temperature range for environmental suitability.

Part Context

This part belongs to the S-8521 series of synchronous rectification step-down regulators from ABLIC. The series is designed for applications requiring high efficiency and compact size. The S-8521B variant typically denotes specific output voltage options within the family. It complements other PMIC offerings like the S-8520 non-synchronous series.

Replacement Considerations

Check for direct pin-to-pin replacements within the S-8521 series with different output voltages if voltage adjustment is needed. Compare performance metrics such as quiescent current and load regulation with competitors like TI or MPS buck converters. Ensure thermal dissipation capabilities match the new component's specifications.