S-8358B28MC-NQNT2U

Overview

The S-8358B28MC-NQNT2U is a step-up switching controller IC from ABLIC, designed for boost DC-DC conversion. It operates with a supply voltage range of 0.9V to 10V and features a fixed switching frequency of 100kHz. The device supports a maximum duty cycle of 90% and utilizes PWM/PFM control modes. It is housed in an SOT-23-5 package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated step-up topology for efficient voltage boosting
• Dual-mode operation combining PWM and PFM for optimized efficiency
• High input voltage tolerance up to 10V
• Compact surface-mount packaging for space-constrained designs

Applications

• Battery-powered portable electronics requiring voltage elevation
• Low-voltage sensor interfaces needing stable higher rails
• Consumer devices utilizing single-cell lithium-ion power sources
• Industrial IoT nodes operating on variable input supplies

Procurement Notes

Verify the specific suffix NQNT2U against official ABLIC documentation to confirm tape-and-reel specifications and marking codes. Ensure compatibility with existing PCB footprints for the SOT-23-5 package. Cross-reference lead times directly with authorized distributors as manufacturing schedules may vary. Confirm RoHS compliance status through current environmental declarations prior to final procurement approval.

Selection Notes

Select this component when a fixed 100kHz switching frequency is required for EMI management. The 0.9V minimum input voltage allows operation with deeply discharged batteries. Consider the 90% maximum duty cycle limits for high step-up ratios. Verify that external inductor and capacitor selections support the internal controller's drive capabilities without exceeding thermal limits.

Part Context

This part belongs to the S-8358 series of switching controllers, which are engineered for general-purpose power management applications. The series offers various output voltage configurations and control modes to suit different system requirements. It serves as a core component for designing compact, efficient power stages in modern electronic devices.

Replacement Considerations

Direct substitutes include other S-8358 series variants with matching pinouts and electrical characteristics. Verify equivalent switching frequencies and input voltage ranges before substitution. Ensure alternative parts support the same SOT-23-5 package dimensions for seamless integration.