S-8521B31MC-ATQT2G

Overview

The S-8521B31MC-ATQT2G is a synchronous rectification step-down DC/DC converter IC manufactured by ABLIC Inc. It operates within an input voltage range of 2.5V to 10V and provides a fixed output voltage of 3.1V. The device supports a maximum switching frequency of 60kHz and features a duty cycle capability up to 100%. Designed for surface-mount installation, it utilizes the SC-74A (SOT-753) package configuration. The component functions as a positive output regulator with one output channel and includes enable control characteristics. It is rated for operation across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates synchronous rectification technology for improved power conversion efficiency
• Supports 100% duty cycle operation to maintain regulation at low input-to-output voltage differentials
• Features integrated enable control functionality for system power management

Applications

• Battery-powered portable electronic devices requiring efficient voltage regulation
• Embedded systems utilizing microcontrollers or logic circuits needing stable 3.1V supply
• Industrial equipment operating within standard commercial temperature ranges

Procurement Notes

Verify the specific suffix ATQT2G against official ABLIC documentation to confirm packaging and tape-and-reel specifications. Confirm current lifecycle status, as similar S-8521 variants may carry end-of-life designations. Ensure compatibility with required PCB footprint dimensions for the SC-74A package before finalizing procurement orders.

Selection Notes

Select this component when a fixed 3.1V output is required from a 2.5V to 10V input source. The synchronous design offers higher efficiency compared to non-synchronous alternatives. Verify that the 60kHz switching frequency aligns with electromagnetic interference constraints and inductor selection requirements for the target application circuit.

Part Context

This part belongs to the S-8521 series of synchronous buck regulators from ABLIC. The series is characterized by compact packaging and integration suitable for space-constrained designs. The S-8521 family typically targets applications requiring reliable DC-DC conversion with minimal external component count.

Replacement Considerations

Consult official ABLIC substitution guides for direct equivalents. Cross-reference pinouts and electrical parameters carefully if considering third-party synchronous buck controllers.