S-8521D20MC-BXFT2U

Overview

The S-8521D20MC-BXFT2U is a step-down switching regulator controller manufactured by ABLIC Inc. It operates within an input voltage range of 2.5V to 16V and delivers a fixed output voltage of 2.0V. The device features a switching frequency of 60kHz and supports up to 100% duty cycle operation. Designed for surface-mount applications, it utilizes the SOT-23-5 package (SC-74A). The component functions as a positive output DC-DC converter with transistor driver outputs and includes enable control characteristics. It complies with RoHS3 standards and operates across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates synchronous rectification-free buck topology for efficient power conversion
• Features built-in enable control functionality for system power management
• Supports full duty cycle operation for minimal dropout voltage requirements

Applications

• Battery-powered portable electronic devices requiring efficient step-down regulation
• General-purpose DC-DC conversion in embedded systems
• Power management circuits in consumer electronics operating within specified voltage ranges

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific suffix matches the required output voltage and package variant. Check current lifecycle status as availability may vary. Ensure compliance with regional environmental regulations such as RoHS3 before integration into final products.

Selection Notes

Select this model when a fixed 2.0V output from a 2.5V to 16V input source is required. Consider the 60kHz switching frequency for EMI constraints and external component sizing. The SOT-23-5 package suits space-constrained designs. Verify thermal performance under maximum load conditions given the single-output configuration.

Part Context

This component belongs to the S-8521 series of switching regulators from ABLIC Inc. The series focuses on low-power DC-DC conversion solutions suitable for battery-operated applications. The S-8521 family provides various fixed output voltages while maintaining consistent control architecture and packaging options for design flexibility.

Replacement Considerations

Consult official ABLIC documentation for verified substitute part numbers within the S-8521 series. Cross-reference output voltage tolerance, switching frequency, and package dimensions. Ensure any replacement maintains compatibility with existing enable logic and thermal requirements.