S-8521B40MC-ATZT2U

Overview

The S-8521B40MC-ATZT2U is a step-down DC-DC switching controller manufactured by ABLIC Inc. It operates with a switching frequency of 180 kHz and features a low quiescent current of 60 µA. The device supports positive output configurations and utilizes PWM/PFM control modes. It is housed in an SOT-23-5 surface-mount package, designed for efficient power management in compact electronic applications.

Feature Summary

• Integrates PWM and PFM control modes for optimized efficiency across varying load conditions
• Features ultra-low quiescent current consumption to extend battery life in portable devices
• Supports step-down voltage conversion with positive output configuration

Applications

• Battery-powered portable electronics requiring low standby current
• Embedded systems utilizing step-down DC-DC conversion
• Compact consumer devices with space-constrained PCB layouts

Procurement Notes

Verify the complete part number including suffixes such as ATZT2U against official ABLIC documentation to ensure correct packaging and specifications. Confirm RoHS compliance status and active lifecycle status through authorized distributors or direct manufacturer channels before finalizing procurement plans.

Selection Notes

Select this component when designing circuits that require a dedicated switching controller rather than a fully integrated regulator IC. Consider the 180 kHz switching frequency and 60 µA quiescent current as key differentiators for low-power applications. Ensure external inductor and capacitor selections align with the controller's operational requirements for stability.

Part Context

This component belongs to the S-8521 series of switching controllers from ABLIC. It is categorized under Power Management ICs (PMIC) specifically within the DC-DC Switching Controllers subcategory. The device complements other ABLIC power solutions by providing control functionality for external power stages.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Verify compatibility with existing designs by comparing pinouts, control interfaces, and electrical characteristics with alternative stepping controllers from ABLIC or other manufacturers.