S-8358F33MC-MKST2U

Overview

The S-8358F33MC-MKST2U is a step-up switching regulator controller from the ABLIC S-8358 series. It operates with a fixed output voltage of 3.3 V and features an ultra-low quiescent current of 25.9 uA. The device supports both PWM and PFM modes for optimized efficiency across load conditions. It functions within an input voltage range suitable for single-cell lithium-ion battery applications. The component is housed in a compact SOT-23-5 package, designed for surface-mount installation. It ensures stable operation across a wide temperature range from -40°C to +85°C.

Feature Summary

• Integrates automatic switching between PWM and PFM control modes to maintain high efficiency at varying load currents.
• Features ultra-low standby current consumption to extend battery life in portable electronic devices.
• Includes built-in protection mechanisms against over-current and thermal issues for reliable operation.

Applications

• Portable consumer electronics powered by single-cell lithium-ion batteries
• Battery-operated medical devices requiring low power consumption
• Wireless sensors and IoT modules

Procurement Notes

Verify the complete part number including suffixes such as MKST2U to ensure correct packaging and tape-and-reel specifications. Confirm RoHS compliance status through official manufacturer documentation before integration. Check for automotive qualification requirements if the application demands specific reliability standards beyond standard industrial grades.

Selection Notes

Select this component when designing systems that require a fixed 3.3 V output from a single-cell lithium source. Consider the 25.9 uA quiescent current for applications prioritizing standby power efficiency. Ensure the external inductor and capacitor values match the internal switching frequency and control loop requirements specified in the datasheet for stability.

Part Context

This part belongs to the S-8358 series of step-up switching regulators manufactured by ABLIC Inc. The series is characterized by low quiescent current and integrated power switches. It targets applications needing efficient power conversion from single-cell lithium batteries to regulated DC voltages for digital logic or peripheral circuits.

Replacement Considerations

Direct substitutes include other parts from the S-8358 family with compatible output voltages and pinouts, such as variants with different output voltage settings. Verify electrical compatibility and package dimensions before substitution.