S-8358B33UA-NQST2U

Overview

The S-8358B33UA-NQST2U is a step-up switching regulator IC from the ABLIC S-8358 series, designed for efficient power management in compact electronic devices. It operates with a fixed output voltage of 3.3 V and features an ultra-low quiescent current of 25.9 uA to maximize battery life. The device supports both PWM and PFM modes via the SWR pin, ensuring stable regulation across varying load conditions. It functions within an input voltage range of 0.7 V to 5.5 V and delivers up to 600 mA of output current. Operating reliably between -40°C and +85°C, it is housed in a compact SOT-89-3 package suitable for surface-mount applications.

Feature Summary

• Ultra-low quiescent current consumption enhances energy efficiency in battery-powered systems.
• Integrated PWM/PFM mode selection allows optimization for either high efficiency or low noise performance.
• Wide input voltage range accommodates various single-cell battery types and discharge profiles.
• Compact SOT-89-3 package facilitates space-constrained PCB layouts.

Applications

• Portable consumer electronics requiring extended battery operation
• Wearable health monitoring devices
• IoT sensor nodes and wireless communication modules
• Medical diagnostic equipment

Procurement Notes

Verify the specific suffix NQST2U against the official ABLIC datasheet to confirm package type and tape/reel specifications. Ensure compatibility with your board's thermal design and input voltage constraints. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm RoHS compliance status if required by your assembly standards.

Selection Notes

Select this component when a fixed 3.3 V output is required with minimal standby current draw. Compare the 600 mA output capability against your peak load requirements. Consider the SOT-89-3 package size relative to available PCB real estate. Evaluate the need for external compensation components based on your specific inductor selection and layout constraints.

Part Context

This part belongs to the S-8358 series of step-up DC-DC converters from ABLIC Inc., focusing on low-power applications. The series is characterized by high efficiency and small footprint solutions for portable devices. The S-8358B variant specifically denotes the 3.3 V fixed output version within this family, distinct from adjustable or other voltage variants.

Replacement Considerations

Check for direct pin-compatible alternatives within the S-8358 series offering different output voltages or currents. Verify electrical equivalence for any cross-brand replacements, focusing on quiescent current, switch frequency, and maximum output current ratings.