S-8521E25MC-BLKT2U

Overview

The S-8521E25MC-BLKT2U is a step-down switching regulator controller manufactured by ABLIC Inc. It operates within an input voltage range of 2.5V to 16V and provides a fixed output voltage of 2.5V. The device utilizes a buck topology with a single positive output configuration. It is housed in a compact SOT-23-5 package (SC-74A/SOT-753) suitable for surface mount applications. The component supports a switching frequency of 60kHz and features a maximum duty cycle of 100%. It includes enable control functionality and operates across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a synchronous rectification capable buck controller architecture for efficient power conversion.
• Supports continuous conduction mode operation with a maximum duty cycle of 100% for low dropout performance.
• Includes hardware enable pin functionality for precise power management sequencing.

Applications

• Portable electronic devices requiring stable low-voltage power rails
• Battery-powered systems utilizing single-cell lithium-ion sources
• Embedded industrial control modules

Procurement Notes

Verify the specific suffix BLKT2U against official ABLIC documentation to confirm tape-and-reel packaging and marking codes. Confirm RoHS compliance status via the manufacturer's current environmental declaration. Ensure the sourcing channel provides valid traceability for this discontinued or limited-stock item.

Selection Notes

Select this component when a fixed 2.5V output is required from inputs up to 16V. The SOT-23-5 package limits thermal dissipation; verify PCB layout requirements for heat spreading. Compare against the S-8520 series if different switching frequencies or package options are preferred for the design.

Part Context

This part belongs to the S-8521 series of DC-DC switching regulators from ABLIC. The series focuses on high-efficiency power management for portable electronics. The S-8521 variants typically integrate power switches or serve as controllers depending on the specific sub-model, offering compact solutions for space-constrained designs.

Replacement Considerations

Consult the official ABLIC cross-reference guide for verified substitutes. The S-8520F45MC-BOET2U shares the same package but differs in output voltage and switching characteristics. Do not assume functional compatibility without verifying electrical parameters against the new component datasheet.