S-8520B43MC-ASCT2U

Overview

The S-8520B43MC-ASCT2U is a CMOS step-down switching regulator controller manufactured by ABLIC Inc. It operates with Pulse Width Modulation (PWM) control and supports an input voltage range of 2.5 V to 16 V. The device provides a fixed output voltage of 4.3 V and delivers an output current capability up to 100 mA. It features a typical quiescent current of 100 µA during operation. The component functions within a temperature range of -40 °C to +85 °C and is housed in a compact SOT-23 package.

Feature Summary

• Integrates PWM control circuitry for efficient step-down voltage regulation
• Supports wide input voltage ranges suitable for various power sources
• Utilizes low-profile surface-mount packaging for space-constrained designs

Applications

• Battery-powered portable electronic devices
• General-purpose embedded system power supplies
• Industrial equipment requiring stable DC voltage conversion

Procurement Notes

Verify the specific suffix codes against official datasheets to confirm pinout compatibility and thermal characteristics. Ensure that external components such as inductors and capacitors meet the electrical requirements specified in the manufacturer's application notes for stable operation.

Selection Notes

Select this component when a dedicated PWM-controlled buck converter solution is required rather than a complete integrated switcher. Evaluate the need for external power MOSFETs and verify that the 100 mA output current meets the load requirements of the target circuit design.

Part Context

This part belongs to the S-8520 Series, which consists of CMOS step-down switching regulator controllers. Unlike complete regulators, this series requires external power switches and passive components to function, offering flexibility in designing custom power stages for specific efficiency or size constraints.

Replacement Considerations

Direct replacements include other parts from the S-8520 series with compatible output voltages and packages. Verify functional equivalence regarding control topology and operating parameters before substitution.