S-8520A26MC-AVLT2G

Overview

The S-8520A26MC-AVLT2G is a CMOS step-down switching regulator controller from the S-8520 series, manufactured by ABLIC Inc. It utilizes Pulse Width Modulation (PWM) control to provide low-ripple power and high efficiency. The device operates with an input voltage range of 2.5 V to 10 V and supports a maximum switching frequency of 375 kHz. It features a duty ratio that varies linearly from 0% up to 100%, ensuring excellent transient characteristics. The IC includes an internal error amplifier and a soft-start circuit to prevent output overshoot during startup. Designed for surface-mount applications, it is housed in a compact SOT-23-5 package and functions 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 output
• Integrated soft-start circuit prevents output voltage overshoot at startup
• Built-in error amplifier ensures stable regulation and excellent transient response

Applications

• Battery-powered portable electronic devices requiring efficient step-down conversion
• Embedded systems needing stable voltage rails from varying supply sources
• Industrial equipment operating within wide ambient temperature ranges

Procurement Notes

Verify the complete part number including suffixes such as AVLT2G to ensure correct packaging and tape-and-reel specifications. Confirm RoHS compliance status and check for any recent PCN notifications regarding marking or material changes. Ensure compatibility with your PCB footprint for the SOT-23-5 package. Validate input voltage requirements against the 2.5 V to 10 V operational range before finalizing procurement.

Selection Notes

Select this component when PWM control is preferred over PFM for consistent noise profiles and ripple performance. It is suitable for designs requiring a wide duty cycle range down to 0%. Consider the external MOSFET or transistor requirements, as this is a controller rather than a fully integrated regulator. Evaluate thermal management needs based on the SOT-23-5 package limitations and expected load currents.

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, distinguishing it from the S-8521 series which supports both PWM and PFM modes. These controllers are designed to work with external power components to form complete DC-DC converter circuits, offering flexibility in design while maintaining high efficiency and stability.

Replacement Considerations

Check for direct substitutes within the S-8520 series with different output voltage settings or package variations. Verify pin-to-pin compatibility if replacing with other manufacturers' PWM buck controllers. Ensure the replacement supports the same input voltage range and switching frequency capabilities.