S-8358B31MC-NQQT2U

Overview

The S-8358B31MC-NQQT2U is a step-up switching controller from ABLIC, designed for positive output boost DC-DC conversion. It operates within an input voltage range of 0.9V to 10V and provides a fixed output voltage of 3.1V. The device features a low quiescent current of 25.9uA and supports a maximum output current of 231mA. It utilizes a PWM/PFM hybrid control scheme with a switch frequency of 100kHz. Packaged in a compact SOT-23-5 format, it functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates PWM/PFM hybrid control for optimized efficiency across varying load conditions
• Supports wide input voltage operation suitable for single-cell battery applications
• Delivers high-efficiency step-up regulation with minimal static current consumption

Applications

• Portable electronic devices requiring efficient power management
• Battery-powered systems utilizing single-cell lithium-ion or lithium-polymer sources
• Low-power consumer electronics needing stable regulated voltage rails

Procurement Notes

Verify the specific suffix NQQT2U against official ABLIC documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing PCB footprints for the SOT-23-5 package. Cross-reference the fixed 3.1V output requirement with system design needs before procurement. Confirm RoHS compliance status through the manufacturer's latest environmental declarations.

Selection Notes

Select this component when a fixed 3.1V output is required from a variable input source between 0.9V and 10V. The 25.9uA quiescent current makes it suitable for battery-operated devices where standby power conservation is critical. The SOT-23-5 package offers a small footprint for space-constrained designs. Consider the 100kHz switching frequency for inductor size trade-offs compared to higher-frequency alternatives.

Part Context

This part belongs to the S-8358 series of step-up switching controllers by ABLIC. The series is characterized by high efficiency and low power consumption. The S-8358B31MC variant specifically denotes the 3.1V output version. It is categorized under PMIC DC-DC Switching Controllers, distinct from linear regulators or charge pump variants found in other ABLIC product lines.

Replacement Considerations

The S-8358J33MC-NWST2U is a documented substitute within the same series, offering a similar form factor but with a different fixed output voltage of 3.3V instead of 3.1V. Verify that the system can tolerate the slight voltage difference. Other S-8358 variants may share the same package but differ in output voltage or pin configuration.