S-8520C28MC-BRNT2G

Overview

The S-8520C28MC-BRNT2G is a CMOS step-down switching regulator controller manufactured by ABLIC Inc. It utilizes Pulse Width Modulation (PWM) control to achieve low ripple and high efficiency. The device operates with an input voltage range of 2.5V to 10V and supports a maximum switching frequency of 375kHz. It features a duty ratio capability from 0% to 100%, ensuring excellent transient characteristics. The IC includes an integrated error amplifier and soft-start circuit to prevent startup overshoot. It is housed in a compact SOT-23-5 package and is rated for operation within a temperature range of -40°C to +85°C.

Feature Summary

• PWM control circuit enables linear duty ratio variation from 0% to 100% for low-ripple power output
• Integrated soft-start circuit prevents output voltage overshoot during startup
• Built-in error amplifier ensures stable regulation and excellent transient response

Applications

• Step-down DC-DC converter designs requiring precise voltage regulation
• Portable electronic devices powered by battery sources
• Embedded systems needing efficient power management solutions

Procurement Notes

Verify the specific suffix codes against official ABLIC documentation to confirm pinout, tolerance, and packaging details. Ensure compatibility with external components such as MOSFETs and inductors for the intended application. Confirm RoHS compliance status if required by project specifications. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit products.

Selection Notes

Select this component when a dedicated PWM controller is preferred over integrated converters for flexible topology design. Consider the 375kHz switching frequency for balancing size and efficiency. Verify that the external Pch power MOS FET or PNP transistor meets the current requirements. Ensure the input voltage range aligns with the system's power supply capabilities.

Part Context

This part belongs to the S-8520 Series, which consists of CMOS step-down switching regulator controllers. The series is designed to provide high efficiency and low ripple through PWM control. It serves as a core component in power management circuits where external power switches are utilized to handle higher currents or voltages than the controller itself.

Replacement Considerations

Direct substitutes include other parts from the S-8520/8521 series with compatible pinouts and electrical characteristics. Verify functional equivalence regarding PWM control and operating voltage ranges before replacement.