S-8521E19MC-BLET2U

Overview

The S-8521E19MC-BLET2U is a step-down switching regulator controller manufactured by ABLIC Inc. It operates within an input voltage range of 3.1 V to 10 V and delivers a fixed output voltage of 1.9 V. The device supports a maximum output current of 300 mA and functions with a switching frequency of 250 kHz. It features a low quiescent current of 18.7 uA and operates reliably across a temperature range from -40°C to +85°C. The component is housed in a compact SOT-23-5 package, suitable for surface mount applications.

Feature Summary

• Integrated buck converter controller for efficient step-down power conversion
• Low quiescent current consumption for extended battery life in portable devices
• Fixed output voltage configuration simplifies external component selection

Applications

• Battery-powered portable electronics
• Consumer handheld devices
• Industrial control systems requiring stable low-voltage rails

Procurement Notes

Verify the exact suffix against official ABLIC documentation to confirm pinout and electrical specifications. Ensure compatibility with external inductor and capacitor values specified in the datasheet. Confirm RoHS compliance status through manufacturer declarations before integration into regulated assemblies.

Selection Notes

Select this controller when a fixed 1.9 V output is required from a 3.1 V to 10 V input source. Consider the 250 kHz switching frequency for balancing efficiency and component size. Evaluate thermal performance based on the expected load current and ambient operating conditions within the specified temperature range.

Part Context

This component belongs to the S-8521 series of DC-DC switching regulators from ABLIC. The series offers various fixed output voltages and packaging options. The S-8521E19MC-BLET2U specifically targets applications needing a precise 1.9 V rail with high efficiency and low standby current consumption.

Replacement Considerations

Consult official cross-reference lists for verified substitutes. Ensure any replacement matches the SOT-23-5 package, 1.9 V output, and 300 mA current capability.