S-8521C27MC-BTMT2U

Overview

The S-8521C27MC-BTMT2U is a synchronous buck DC-DC switching controller manufactured by ABLIC Inc. It operates within an input voltage range of 2.5V to 10V and delivers a fixed positive output. The device integrates a 60kHz switching frequency with a maximum duty cycle of 100%. Designed for surface-mount applications, it utilizes the SC-74A (SOT-753) package configuration. The component supports an operating temperature range from -40°C to +85°C and features enable control characteristics.

Feature Summary

• Integrates a step-down topology with a fixed 60kHz switching frequency for efficient power conversion.
• Supports a maximum duty cycle of 100% to maintain regulation at low input-to-output voltage differentials.
• Features an enable pin for precise power management and system state control.

Applications

• Battery-powered portable electronic devices requiring regulated step-down power
• Embedded systems utilizing single-cell lithium-ion or lithium-polymer batteries
• General-purpose DC-DC conversion in compact consumer electronics

Procurement Notes

Verify the specific suffix BTMT2U against official datasheets to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status as indicated in current documentation. Check for obsolescence notices, as this part may be marked as not recommended for new designs due to minimum order quantity constraints or lifecycle status.

Selection Notes

Select this controller when a fixed output voltage buck solution is required without external feedback resistors. Ensure the application input voltage remains within the 2.5V to 10V operational window. Verify that the load requirements align with the internal driver capabilities and that the SOT-23-5 footprint fits the PCB layout constraints.

Part Context

This component belongs to the S-8521 series of switching controllers from ABLIC Inc. It is categorized under PMIC DC-DC Switch Controllers. The series is designed for low-power applications where space efficiency and simple implementation are prioritized over adjustable output flexibility.

Replacement Considerations

Consult official ABLIC documentation for direct cross-reference part numbers. Verify pin compatibility and electrical parameters before substituting with other buck controllers from different manufacturers.