S-8520F36MC-BNVT2G

Overview

The S-8520F36MC-BNVT2G 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 3.6 V, an input voltage range of 2.5 V to 10 V, and a switching frequency of 180 kHz. 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 format, it operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates PWM control circuitry for linear duty ratio variation up to 100%, ensuring stable low-ripple output performance.
• Includes an internal error amplifier and a dedicated soft-start circuit to manage startup transients effectively.
• Offers flexible external component configuration using standard Pch MOS FETs or PNPs with discrete coils and capacitors.

Applications

• Portable electronic devices requiring efficient step-down power conversion
• Battery-powered systems needing regulated voltage rails
• General-purpose DC-DC converter designs

Procurement Notes

Verify the specific suffix BNVT2G against official ABLIC documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required input voltage ranges and thermal management strategies for the SOT-23-5 package. Cross-reference RoHS compliance status with current environmental declarations before finalizing procurement orders.

Selection Notes

Select this component when a fixed 3.6 V output is required without external resistor programming. It is suitable for applications prioritizing simplicity and cost-efficiency over programmability. Consider the 180 kHz switching frequency for balancing component size and electromagnetic interference. Verify that the external driver stage matches the controller's drive capabilities.

Part Context

This part belongs to the S-8520/8521 series of CMOS step-down switching regulator controllers. The S-8520 series specifically focuses on PWM control for consistent performance across load variations. It serves as a core control element in non-synchronous buck converter topologies, distinguishing itself from integrated switch regulators by requiring external power components.

Replacement Considerations

Direct substitutes include other S-8520 series variants with different fixed output voltages, such as S-8520A or S-8520B series parts. Ensure the replacement maintains the same SOT-23-5 footprint and pinout configuration. Verify that the alternative part supports the required 2.5 V to 10 V input range and 180 kHz switching frequency.