S-8521F19MC-BPET2G

Overview

The S-8521F19MC-BPET2G is a single-output, positive step-down DC-DC switching controller manufactured by ABLIC Inc. It operates within a supply voltage range of 2.5V to 16V and supports a fixed switching frequency of 300kHz. The device features a maximum duty cycle of 100% and utilizes an SOT-23-5 package. Designed for surface-mount installation, it functions as a buck regulator with transistor driver outputs and includes enable control characteristics.

Feature Summary

• Supports 100% maximum duty cycle for low dropout operation
• Integrated enable pin for power management control
• Fixed 300kHz switching frequency for compact external component sizing

Applications

• Battery-powered portable electronic devices
• Positive output step-down voltage regulation
• General-purpose DC-DC conversion in embedded systems

Procurement Notes

Verify the specific suffix BPET2G against the manufacturer's current datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with the required input voltage range of 2.5V to 16V. Confirm that the 300kHz switching frequency aligns with the design's electromagnetic interference constraints and efficiency targets before finalizing procurement.

Selection Notes

Select this controller when a fixed 300kHz frequency is required for a single-phase buck topology. It is suitable for applications needing a wide input voltage range up to 16V. The SOT-23-5 package is ideal for space-constrained designs. Verify that the external MOSFETs and passive components are rated for the expected current and voltage stresses associated with the 100% duty cycle capability.

Part Context

This component belongs to the S-8521 series of DC-DC switching controllers from ABLIC Inc. The series offers various output voltage options and switching frequencies. The F19 variant specifically denotes the internal feedback resistor network setting the output voltage, while the BPET2G suffix indicates the specific packaging and reel configuration for automated assembly.

Replacement Considerations

Check for direct pin-compatible alternatives within the S-8521 family that match the 300kHz frequency and 16V max input rating. Verify that any substitute maintains the same SOT-23-5 footprint and enable logic levels. Cross-reference the internal feedback divider ratio to ensure no external resistor adjustments are needed.