S-8358B33UA-NQST2G

Overview

The S-8358B33UA-NQST2G is a boost regulator positive output step-up DC-DC controller IC manufactured by ABLIC Inc. It operates within an input voltage range of 900 mV to 10 V and provides a fixed output voltage of 3.3 V. The device supports an output current of 231 mA with a typical static current consumption of 18.7 uA. It functions at a switching frequency of 50 kHz and is housed in a compact SOT-89-3 package. The component is designed for surface mount installation and operates reliably across a temperature range from -40°C to +85°C.

Feature Summary

• Integrates a high-efficiency synchronous step-down DC-DC converter architecture for power management applications.
• Features low quiescent current consumption to enhance battery life in portable devices.
• Utilizes a compact SOT-89-3 package suitable for space-constrained designs.

Applications

• Portable electronic devices requiring efficient voltage boosting
• Battery-powered systems needing stable 3.3 V output
• General-purpose DC-DC conversion in consumer electronics

Procurement Notes

Verify the specific suffix NQST2G against the manufacturer's latest datasheet to confirm pinout and electrical characteristics, as suffixes often denote tape-and-reel packaging or specific environmental ratings. Ensure compatibility with your PCB footprint for the SOT-89-3 package. Cross-reference the part number with authorized distributors to avoid counterfeit components, especially given the prevalence of similar model numbers in the S-835x series.

Selection Notes

Select this component when a boost topology is required to step up low input voltages to a regulated 3.3 V level. It is suitable for applications prioritizing low standby current and moderate output current capabilities. Compare its 50 kHz switching frequency against system noise requirements. Consider the SOT-89-3 thermal performance if operating near the upper temperature limits.

Part Context

This part belongs to the ABLIC S-835x series of switching regulators, which are widely used in power management integrated circuits (PMIC). The series includes various topologies such as boost and buck converters. The S-8358 variant specifically addresses step-up applications, distinguishing it from the S-8353 or S-8354 models which may offer different control mechanisms or efficiency profiles.

Replacement Considerations

Direct substitutes include other ABLIC boost regulators with identical 3.3 V output and SOT-89-3 packaging, such as variants within the S-8354 series. Verify that any replacement matches the 231 mA output current capability and 18.7 uA static current specifications to ensure circuit stability.