S-8521E22MC-BLHT2G

Overview

The S-8521E22MC-BLHT2G is a step-down DC/DC switching controller IC manufactured by ABLIC Inc. It operates with a fixed switching frequency of 60 kHz and supports a maximum duty cycle of 100%. The device accepts an input supply voltage range of 2.5V to 10V and provides a single positive output configuration via a transistor driver stage. Designed for surface-mount assembly, it is housed in a compact SC-74A (SOT-753) package with five pins. The component functions within an ambient operating temperature range of -40°C to +85°C and includes enable control features for power management.

Feature Summary

• Fixed 60 kHz switching frequency operation
• Supports up to 100% duty cycle for low dropout applications
• Integrated enable pin for power state control

Applications

• Battery-powered portable electronic devices
• General-purpose DC-DC conversion circuits
• Embedded systems requiring stable voltage regulation

Procurement Notes

Verify the specific suffix BLHT2G against official ABLIC documentation to confirm packaging type and tape-and-reel specifications. Ensure compatibility with standard SC-74A footprints during PCB layout. Confirm RoHS compliance status through current manufacturer declarations before finalizing procurement orders.

Selection Notes

Select this component when a low-cost, fixed-frequency buck controller is required for moderate current applications. The 60 kHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Verify that the 2.5V to 10V input range aligns with the system's available power rails and that the SOT-753 package fits the mechanical constraints.

Part Context

This part belongs to the S-8521 series of step-down switching controllers from ABLIC. The series is designed for cost-sensitive applications requiring reliable voltage regulation without integrated power switches. It complements other PMIC offerings by providing a basic control interface for external MOSFETs, distinguishing it from fully integrated converter ICs.

Replacement Considerations

Consult official substitution lists for direct equivalents. Cross-reference electrical parameters such as switching frequency, input voltage range, and package dimensions with alternative suppliers to ensure functional compatibility.