S-8521D27MC-BXMT2G

Overview

The S-8521D27MC-BXMT2G is a CMOS step-down switching regulator controller from the S-8521 series, manufactured by ABLIC Inc. It operates with PWM or PFM control modes and features a supply voltage range of 2.5V to 16V. The device switches at 60kHz with a maximum duty cycle of 100%. It provides positive output configuration in a SC-74A (SOT-753) package. The operational temperature range spans from -40°C to +85°C.

Feature Summary

• Supports automatic switching between PWM and PFM control modes for optimized efficiency across varying load conditions.
• Features a soft-start circuit to prevent output overshoot during startup sequences.
• Capable of linear duty ratio variation from 0% to 100% under PWM control for low-ripple power delivery.

Applications

• Step-down DC-DC converter designs requiring external power MOSFETs
• Battery-powered portable electronics needing high efficiency
• Embedded systems operating within specified voltage and temperature ranges

Procurement Notes

Verify the specific suffix BXMT2G against official datasheets to confirm packaging and tape-and-reel specifications. Confirm RoHS compliance status and REACH registration details prior to integration. Ensure the supplier provides valid traceability documentation matching the manufacturer's part identification codes.

Selection Notes

Select this component when designing buck converters requiring flexible control mode switching between PWM and PFM. It is suitable for applications demanding wide input voltage tolerance up to 16V and operation in automotive or industrial environments characterized by temperatures down to -40°C. External components must be selected to match the 60kHz switching frequency.

Part Context

This part belongs to the S-8521 series of CMOS step-down switching regulator controllers. The series includes variants with different control strategies, such as the S-8520 which utilizes fixed PWM control. The S-8521 series distinguishes itself by offering dual-mode operation to enhance efficiency in light-load scenarios while maintaining stability under heavy loads.

Replacement Considerations

Consider the S-8521C27MC-BTMT2G for similar functionality with a reduced supply voltage range of 2.5V to 10V. Verify that the alternative part number meets the required thermal and electrical specifications for the target application.