S-8521F40MC-BPZT2G

Overview

The S-8521F40MC-BPZT2G is a step-down DC-DC switching controller manufactured by ABLIC Inc. It operates with a fixed switching frequency of 60kHz and supports a supply voltage range of 2.5V to 10V. The device features a positive output configuration and utilizes a transistor driver for external switch control. It offers a maximum duty cycle of 100% and includes an enable control feature. The component is housed in a SOT-23-5 (SC-74A) surface-mount package and functions within a temperature range of -40°C to 85°C.

Feature Summary

• Step-down topology with 100% maximum duty cycle capability
• Fixed 60kHz switching frequency operation
• Transistor driver output for external power switch control
• Enable pin functionality for power management

Applications

• Battery-powered portable devices requiring efficient voltage regulation
• Embedded systems utilizing low-voltage power supplies
• General-purpose step-down conversion in consumer electronics

Procurement Notes

Verify the specific suffix BPZT2G against the official datasheet to confirm package type and tape/reel specifications. Confirm RoHS compliance status as indicated in current documentation. Check part status, as this model may be marked as not recommended for new designs. Ensure compatibility with existing PCB footprints for SOT-23-5 packages during procurement planning.

Selection Notes

Select this controller when a fixed-frequency buck solution is required without integrated power switches. The 60kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Verify that the external transistor can handle the required load current and voltage ratings. Ensure the input voltage stays within the 2.5V to 10V operational range for stable performance.

Part Context

This component belongs to the S-8521 series of DC-DC controllers from ABLIC Inc. The series focuses on efficient step-down conversion for low-power applications. The S-8521 family typically offers compact packaging options suitable for space-constrained designs. This specific variant integrates essential control logic while relying on external components for power handling.

Replacement Considerations

Check for direct substitutes within the S-8521 series with compatible output voltages and pin configurations. Verify functional equivalence regarding switching frequency and control interface before substitution.