S-8355K33MC-NAST2U

Overview

The S-8355K33MC-NAST2U is a boost switching controller IC from the ABLIC S-8355 series, designed for step-up DC/DC conversion. It features a fixed 3.3V output voltage and operates within an input supply range of 0.9V to 10V. The device utilizes a 600kHz switching frequency with a maximum duty cycle of 85%. It is housed in a compact SOT-23-5 package and supports operation across a temperature range of -40°C to +85°C. The controller includes enable functionality and provides a transistor driver output stage.

Feature Summary

• Integrated boost topology for efficient step-up voltage regulation
• Fixed 3.3V output configuration for standardized power rails
• Wide input voltage operating range supporting diverse power sources
• Built-in enable control feature for system power management

Applications

• Portable electronic devices requiring stable 3.3V logic supplies
• Battery-powered systems utilizing single-cell or multi-cell configurations
• Embedded circuits needing compact surface-mount power management solutions

Procurement Notes

Verify the specific suffix NAST2U against official ABLIC documentation to confirm package type and tape/reel specifications. Ensure compatibility with your PCB footprint for the SOT-23-5 package. Cross-reference the part number with authorized distributors to confirm current availability and lead times, as manufacturing cycles may vary. Confirm RoHS compliance status if required by your assembly standards.

Selection Notes

Select this component when a fixed 3.3V boost output is required with minimal external components. The 600kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 0.9V minimum input voltage for low-voltage battery applications. Verify that the load current requirements are met by the external switch and inductor selection, as this is a controller rather than a fully integrated regulator.

Part Context

This part belongs to the S-8355 series of switching controllers from ABLIC Inc., which focuses on high-efficiency power management solutions. The series is characterized by its compact packaging and flexible input voltage ranges, suitable for various consumer and industrial electronics. The S-8355K variant specifically denotes the fixed output voltage version within this family.

Replacement Considerations

Direct replacements within the same series include other S-8355 variants with different output voltages or packages, such as S-8355Q15MC-OWAT2U. Check datasheets for pin-to-pin compatibility and electrical parameter alignment before substitution.