S-8520B33MC-ARST2G

Overview

The S-8520B33MC-ARST2G is a step-down switching regulator controller manufactured by ABLIC Inc. It operates with a fixed switching frequency of 180kHz and supports a duty cycle up to 100%. The device accepts an input voltage range of 2.5V to 16V and provides a regulated positive output of 3.3V. Designed for surface-mount applications, it utilizes the SC-74A (SOT-753) package configuration. The component functions within an ambient temperature range of -40°C to +85°C and includes enable control features for power management efficiency.

Feature Summary

• Integrates PWM control circuitry for efficient DC-DC conversion
• Supports 100% duty cycle operation for low dropout performance
• Includes enable pin functionality for system power management

Applications

• Portable electronic devices requiring stable 3.3V logic supplies
• Battery-powered systems utilizing step-down topology
• General-purpose embedded power management circuits

Procurement Notes

Verify the specific suffix ARST2G against official ABLIC documentation to confirm tape-and-reel packaging specifications and marking codes. Ensure compatibility with standard SOT-753 footprint designs. Cross-reference the exact part number with current distributor catalogs to validate availability status and lead times prior to finalizing procurement plans.

Selection Notes

Select this component when a fixed 3.3V output is required from a 2.5V to 16V input source using a non-synchronous buck topology. The 180kHz switching frequency offers a balance between component size and efficiency. Verify that the external inductor and capacitor selections align with the controller's drive capabilities and stability requirements for the intended load conditions.

Part Context

This part belongs to the S-8520 series of CMOS step-down switching regulator controllers. The series is characterized by high integration and low current consumption. The S-8520 variant specifically employs PWM control, distinguishing it from the S-8521 series which supports switchable PWM/PFM modes. This family targets compact power supply designs in consumer and industrial electronics.

Replacement Considerations

Consult official substitution lists for direct equivalents within the S-8520 series. Verify pinout compatibility and electrical parameters before considering alternative manufacturers. No public substitute part numbers are confirmed for this specific model.