S-8521F38MC-BPXT2U

Overview

The S-8521F38MC-BPXT2U is a step-down DC-DC switching controller manufactured by ABLIC Inc. It operates with a fixed output voltage of 3.8 V and utilizes PWM control topology. The device is housed in an SOT-23-5 package and supports surface-mount installation. It functions within a temperature range of -40°C to +85°C. The component is part of the S-8521 series, designed for efficient power management in compact electronic applications requiring regulated lower voltage outputs from higher input sources.

Feature Summary

• Implements synchronous buck regulation architecture for high-efficiency step-down conversion
• Integrates fixed-output voltage setting eliminating external resistor divider requirements
• Utilizes pulse-width modulation technique for stable output regulation under varying load conditions

Applications

• Battery-powered portable electronics requiring regulated 3.8 V supply rails
• Embedded systems utilizing single-cell lithium-ion or lithium-polymer batteries
• IoT devices needing compact power management solutions in small form factors

Procurement Notes

Verify component authenticity through authorized distributors due to potential counterfeit risks. Confirm RoHS compliance status via official datasheets before integration. Check current lifecycle status as availability may vary across regions. Ensure proper handling procedures are followed during assembly to prevent electrostatic discharge damage to the sensitive internal circuitry.

Selection Notes

Choose this controller when a fixed 3.8 V output is required without external programming components. Consider the SOT-23-5 package constraints for PCB layout space. Evaluate thermal performance requirements against the specified operating temperature range. Compare efficiency characteristics with alternative regulators if low quiescent current is critical for battery life extension.

Part Context

This component belongs to the S-8521 series of DC-DC controllers from ABLIC. The series focuses on providing reliable step-down voltage regulation in minimal footprint packages. These controllers are engineered for modern portable devices where space efficiency and power conservation are primary design drivers. The specific model variant indicates its fixed output configuration within the broader product family.

Replacement Considerations

Direct substitutes include other ABLIC S-8521 series variants with compatible pinouts and similar electrical characteristics. Verify output voltage matching and package compatibility before substitution. Cross-reference with equivalent offerings from other manufacturers only if pin-to-pin compatibility and functional equivalence are confirmed through detailed datasheet comparison.