S-8520B32MC-ARRT2G

Overview

The S-8520B32MC-ARRT2G is a CMOS step-down switching regulator controller from the S-8520 series by ABLIC Inc. It utilizes Pulse Width Modulation (PWM) control to provide low-ripple power and high efficiency. The device features a fixed output voltage of 3.2V, selectable input voltage range of 2.5V to 16V, and an internal oscillator operating at 180kHz. It supports a maximum duty cycle of 100% and includes a soft-start circuit to prevent startup overshoot. Packaged in a compact SOT-23-5 surface-mount case, it operates within a temperature range of -40°C to +85°C.

Feature Summary

• PWM Control for Low-Ripple Output
• Integrated Soft-Start Circuit
• 100% Duty Cycle Capability

Applications

• Portable electronic devices requiring efficient step-down conversion
• Battery-powered equipment with strict size constraints
• General-purpose DC-DC converter designs using external Pch MOSFETs

Procurement Notes

Verify the specific suffix 'ARRT2G' against official ABLIC documentation to confirm package type and tape/reel specifications. Ensure compatibility with required input voltage ranges and thermal management strategies for the SOT-23-5 package. Confirm RoHS compliance status if required by your manufacturing standards.

Selection Notes

Select this component when a fixed 3.2V output is required without external feedback resistors. It is suitable for applications prioritizing simplicity and board space over adjustable voltage flexibility. Consider the 180kHz switching frequency for inductor selection and the PWM mode for consistent ripple performance under varying loads.

Part Context

This part belongs to the S-8520 series of CMOS step-down switching regulator controllers. The series is characterized by its ability to vary the duty ratio linearly from 0% to 100%, ensuring excellent transient characteristics. It serves as a core control IC that requires external power switches and passive components to function as a complete DC-DC converter.

Replacement Considerations

Check for other S-8520 variants with different output voltages or input ranges. Verify pinout compatibility before substituting with similar buck controllers from other manufacturers.