S-8521B21MC-ATGT2U

Overview

The S-8521B21MC-ATGT2U is a positive output step-down DC-DC switching controller manufactured by ABLIC Inc. It operates within an input voltage range of 2.5V to 16V and features a fixed switching frequency of 180kHz. The device supports up to 100% duty cycle operation and includes an enable control feature. Packaged in a compact SOT-23-5 format, it functions as a transistor driver for external power switches.

Feature Summary

• Functions as a positive output buck regulator controller
• Supports wide input voltage range from 2.5V to 16V
• Includes enable pin for power management control

Applications

• Battery-powered portable electronics
• General purpose step-down power conversion
• Embedded systems requiring regulated lower voltage rails

Procurement Notes

Verify the exact suffix ATGT2U against official ABLIC documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing PCB footprints for SOT-23-5 components. Confirm availability status as supply conditions may vary by region and distributor.

Selection Notes

Select this component when a fixed 180kHz switching frequency is required for EMI considerations. Suitable for designs needing a simple transistor driver interface rather than an integrated MOSFET solution. Verify that external component selection aligns with the 2.5V to 16V input range constraints.

Part Context

This part belongs to the S-8521 series of DC-DC switching controllers from ABLIC. It is designed for efficient power management in space-constrained applications. The series typically offers low quiescent current and high efficiency characteristics suitable for battery-operated devices.

Replacement Considerations

Check for direct pin-compatible alternatives within the S-8521 family or other ABLIC buck controllers. Verify switching frequency and input voltage overlap before substituting.