S-8520C36MC-BRVT2G

Overview

The S-8520C36MC-BRVT2G is a CMOS step-down switching regulator controller from the S-8520/8521 series, manufactured by ABLIC Inc. It utilizes Pulse Width Modulation (PWM) control to provide low-ripple power and high efficiency. The device features a built-in reference voltage source, oscillation circuit, error amplifier, and soft-start circuit to prevent startup overshoot. Designed for surface-mount installation in an SC-74A (SOT-753) package, it operates within a supply voltage range of 2.5 V to 10 V and supports duty ratios from 0% to 100%.

Feature Summary

• PWM control capability with linear duty ratio variation from 0% to 100%
• Integrated soft-start circuit to prevent output voltage overshoot during startup
• Built-in error amplifier and reference voltage source for stable regulation

Applications

• Step-down DC-DC converter designs requiring external Pch MOSFETs or PNPs
• Portable electronic devices needing efficient power management
• General-purpose industrial equipment power supplies

Procurement Notes

Verify the specific suffix BRVT2G against the official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with external components such as coils, capacitors, and diodes required for the buck topology. Confirm RoHS compliance status through the manufacturer's environmental documentation.

Selection Notes

Select this component when PWM control is preferred over PFM for applications demanding consistent ripple characteristics. It requires external power switches and passive components to function as a complete regulator. Consider the 2.5 V to 10 V input range and SC-74A package constraints for PCB layout.

Part Context

This part belongs to the S-8520/8521 series of switching regulator controllers. While the S-8521 variant supports both PWM and PFM modes, the S-8520 series is dedicated to PWM control. These ICs serve as the core control logic for external power stages rather than integrated switching regulators.

Replacement Considerations

The S-8521 series offers similar functionality but includes PFM control capabilities. Verify if the additional PFM mode is necessary for light-load efficiency requirements before substituting.