S-8521F15MC-BPAT2U

Overview

The S-8521F15MC-BPAT2U is a CMOS step-down switching regulator controller from the S-8520/8521 series, manufactured by ABLIC Inc. It features switchable PWM/PFM control modes and operates within an input voltage range of 2.5 V to 16 V. The device provides a fixed output voltage of 1.5 V with a typical quiescent current of 100 uA. Designed for surface mount applications, it utilizes an SOT-23-5 package and supports operation across a temperature range of -40°C to +85°C.

Feature Summary

• Switchable PWM/PFM control mode for optimized efficiency
• Integrated reference voltage source and error amplifier
• Low quiescent current consumption

Applications

• Battery-powered portable devices
• Consumer electronics power management
• Industrial equipment control circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for recent engineering change notices (ECNs) regarding marking or material changes. Ensure supply chain stability as availability may vary by region.

Selection Notes

Select this controller when a fixed 1.5 V output is required with minimal external component count. The switchable PWM/PFM feature allows adaptation to varying load conditions. Verify that the external inductor and capacitor values align with the 300 kHz switching frequency specifications for stable regulation.

Part Context

This component belongs to the S-8520/8521 series of CMOS step-down switching regulator controllers. While the S-8520 series utilizes fixed PWM control, the S-8521 variant offers switchable PWM/PFM modes. Both share similar internal architectures including oscillation circuits and error amplifiers, differing primarily in control strategy flexibility.

Replacement Considerations

S-8520F15MC-BNAT2U: Compatible fixed-output alternative with PWM-only control. S-8521F45MC-BOET2U: Same series with different output voltage.