S-8521B31MC-ATQT2U

Overview

The S-8521B31MC-ATQT2U is a synchronous rectifier DC-DC switching controller manufactured by ABLIC Inc. It utilizes a buck topology to provide a single positive output with a fixed voltage of 3.1V. The device operates within an input voltage range of 2.5V to 10V and supports a maximum duty cycle of 100%. It features a standard switching frequency of 60kHz and includes enable control functionality. The component is designed for surface mount installation in a compact SOT-23-5 package, ensuring reliable performance across the specified operating temperature range.

Feature Summary

• Synchronous rectification architecture for improved efficiency
• Fixed 3.1V output voltage configuration
• Compact SOT-23-5 surface mount packaging
• Enable pin for power management control

Applications

• Portable electronic devices requiring stable low-voltage regulation
• Battery-powered systems utilizing single-cell lithium-ion sources
• Embedded circuits needing compact DC-DC conversion solutions
• Consumer electronics with strict space constraints

Procurement Notes

Verify the specific suffix 'ATQT2U' against official ABLIC documentation to confirm tape and reel specifications and marking codes. Ensure compatibility with the target PCB footprint for the SOT-23-5 package. Cross-reference the 3.1V output requirement with system load demands before finalizing procurement orders.

Selection Notes

Select this component when a fixed 3.1V output is required without external feedback resistor networks. The synchronous design offers higher efficiency compared to non-synchronous alternatives at similar current levels. Consider the 60kHz switching frequency for applications prioritizing lower electromagnetic interference over faster transient response times.

Part Context

This part belongs to the S-8521 series of DC-DC controllers from ABLIC Inc., which are designed for general-purpose power management applications. The series provides various fixed output voltages to accommodate different logic families and sensor requirements. The S-8521 family is characterized by its small footprint and high integration level suitable for modern miniaturized electronics.

Replacement Considerations

Direct substitutes include other parts from the S-8521 series with matching output voltages and package types. Verify that alternative components support synchronous rectification and the same 2.5V to 10V input range to maintain system performance.