S-8521B30MC-ATPT2G

Overview

The S-8521B30MC-ATPT2G is a CMOS step-down switching regulator controller from ABLIC, designed for high-efficiency power conversion. It features PWM/PFM switching control to optimize performance across varying load conditions. The device operates with an input voltage range of 2.5 V to 10 V and provides a fixed output voltage of 3.0 V. Packaged in a compact SOT-23-5 format, it supports surface-mount installation and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates PWM/PFM switching control that automatically transitions between modes based on load requirements to maintain high efficiency during both active operation and standby states.
• Includes internal reference voltage sources, oscillation circuits, and error amplifiers to regulate output without requiring complex external compensation networks.

Applications

• Battery-powered portable electronic devices requiring efficient step-down regulation
• Embedded systems utilizing single-cell lithium-ion or lithium polymer batteries
• Industrial equipment operating under variable load conditions

Procurement Notes

Verify the specific suffix ATPT2G against the manufacturer's current datasheet to confirm pinout compatibility and marking codes. Ensure the ordering documentation matches the exact part number to avoid receiving variants with different thermal or electrical characteristics. Confirm RoHS compliance status directly with the supplier prior to finalizing procurement orders.

Selection Notes

Select this component when designing circuits that require adaptive efficiency management through automatic mode switching. It is suitable for applications where input voltages fluctuate between 2.5 V and 10 V. Consider the SOT-23-5 package constraints regarding thermal dissipation and board space limitations compared to larger packages.

Part Context

This part belongs to the S-8521 series of switching regulator controllers. The series is characterized by its ability to switch between Pulse Width Modulation and Pulse Frequency Modulation. This family is engineered to provide stable power delivery while minimizing energy loss during light-load scenarios common in modern low-power electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.