S-8520B36MC-ARVT2G

Overview

The S-8520B36MC-ARVT2G is a CMOS step-down switching regulator controller from ABLIC Inc., designed for high-efficiency power conversion. It utilizes Pulse Width Modulation (PWM) control to provide low-ripple output and excellent transient characteristics. The device features a reference voltage source, oscillation circuit, error amplifier, and soft-start functionality to prevent startup overshoot. It operates within an input voltage range of 2.5V to 10V and supports a maximum switching frequency of 180kHz. The component is housed in a compact SC-74A (SOT-753) surface-mount package and functions as a positive output buck converter.

Feature Summary

• PWM control circuit enabling linear duty ratio variation from 0% to 100% for stable regulation
• Integrated error amplifier and soft-start circuit to ensure smooth startup without voltage overshoot
• Compact SC-74A (SOT-753) surface-mount package suitable for space-constrained designs

Applications

• Portable electronic devices requiring efficient step-down power management
• Battery-powered systems needing low-ripple DC-DC conversion
• General-purpose embedded applications utilizing external Pch MOSFETs or PNPs

Procurement Notes

Verify the specific suffix ARVT2G against official ABLIC documentation to confirm tape-and-reel packaging and marking codes. Ensure compatibility with required operating temperature ranges (-40°C to 85°C). Confirm RoHS compliance status prior to integration into final assemblies.

Selection Notes

Select this controller when PWM operation is preferred over PFM for consistent noise profiles. It requires external power switches, inductors, and capacitors to complete the buck topology. Suitable for designs where linear duty cycle adjustment is critical for load transient response.

Part Context

This part belongs to the S-8520 Series, which focuses on PWM-controlled step-down regulators. Unlike the S-8521 series, it does not support automatic PFM switching for light loads, prioritizing steady-state performance and ripple reduction through fixed-frequency PWM operation.

Replacement Considerations

Direct substitutes include other S-8520 series variants with different output voltage settings or package options, such as S-8520E22MC-BJH-T2G, provided the pinout and control logic remain compatible.