S-8520D35MC-BVUT2G

Overview

The S-8520D35MC-BVUT2G is a CMOS step-down switching regulator controller from the S-8520/8521 Series manufactured by ABLIC. It utilizes Pulse Width Modulation (PWM) control to provide low-ripple power, high efficiency, and excellent transient characteristics. The device features an internal error amplifier and a soft-start circuit that prevents output voltage overshoot during startup. Designed for operation with external P-channel power MOS FETs or PNPs, it supports input voltages ranging from 2.5 V to 10 V. The component is housed in a compact SOT-23-5 package.

Feature Summary

• PWM control circuit capable of varying duty ratio linearly from 0% up to 100%
• Integrated soft-start circuit to prevent overshoot at startup
• Low-ripple power supply with high efficiency and excellent transient characteristics

Applications

• Portable electronic devices requiring efficient step-down regulation
• Battery-powered systems needing stable voltage conversion
• Embedded circuits utilizing external P-channel transistors

Procurement Notes

Verify the specific suffix BVUT2G against official ABLIC documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with external P-channel MOSFET selection based on the controller's drive capabilities. Confirm RoHS compliance status through the manufacturer's current datasheet before finalizing procurement orders.

Selection Notes

Select this component when a dedicated PWM controller is required rather than an integrated switcher. It is suitable for designs where external power switches allow for higher current handling or specific voltage levels not supported by monolithic regulators. Consider the need for external components such as coils, capacitors, and diodes to complete the step-down topology.

Part Context

This part belongs to the S-8520 series, which consists of CMOS step-down switching regulator controllers. Unlike the S-8521 series which supports both PWM and PFM modes, the S-8520 series provides fixed PWM control. This distinction ensures consistent switching behavior across load variations, making it ideal for applications prioritizing ripple reduction over ultra-light-load efficiency.

Replacement Considerations

The S-8521 series offers similar functionality but includes PFM mode support for light loads. Direct pin-compatible replacements within the same family should be verified via official substitution lists.