S-8358H33MC-NUST2U

Overview

The S-8358H33MC-NUST2U is a step-up switching regulator controller from ABLIC, designed for efficient power management in compact electronic devices. It operates with a fixed output voltage of 3.3 V and supports PWM/PFM hybrid control modes to optimize efficiency across varying load conditions. The device features a low quiescent current of 25.9 uA, ensuring minimal power drain during standby or light-load operations. It functions within an input voltage range suitable for single-cell lithium-ion battery applications and delivers up to 165 mA output current. The component is housed in a small SOT-23-5 package, facilitating surface-mount installation on space-constrained printed circuit boards.

Feature Summary

• Integrates PWM/PFM hybrid control architecture for enhanced conversion efficiency under dynamic load variations
• Maintains ultra-low static current consumption to extend battery life in portable equipment
• Supports direct connection to single-cell lithium-ion batteries without requiring external level shifting

Applications

• Portable consumer electronics powered by single-cell lithium-ion batteries
• Battery-operated medical devices requiring stable 3.3 V logic supply
• Wireless sensor nodes and IoT modules with strict power budget constraints

Procurement Notes

Verify the complete part number including suffixes against official ABLIC documentation to ensure correct pinout and electrical characteristics. Confirm RoHS compliance status through manufacturer datasheets prior to integration. Cross-reference package markings with approved silkscreen standards to prevent counterfeit components. Validate thermal performance requirements based on actual PCB copper area and ambient operating conditions.

Selection Notes

Select this component when designing systems requiring a regulated 3.3 V rail from a single-cell lithium source. Ensure the application load does not exceed the 165 mA output capability. Consider the SOT-23-5 footprint for layout compatibility. Verify that the 25.9 uA quiescent current meets system standby specifications. Check if the fixed output voltage aligns with downstream IC requirements.

Part Context

This part belongs to the S-8358 series of step-up switching regulators manufactured by ABLIC Inc. The series focuses on low-power applications where battery longevity is critical. The H33 variant specifically provides a fixed 3.3 V output, distinguishing it from adjustable or other voltage variants within the same family. It utilizes CMOS technology for high reliability and low power dissipation.

Replacement Considerations

Direct substitutes include S-8358J33MC-NWST2U and S-8358F33MC-MKST2U, which share identical pinouts and electrical specifications. Verify package marking differences and suffix codes before substitution to ensure mechanical and electrical compatibility.