S-8355K33MC-NAST2G

Overview

The S-8355K33MC-NAST2G is a step-up switching regulator controller manufactured by ABLIC Inc. It operates with a fixed 600 kHz switching frequency and supports both PWM and PFM control modes for optimized efficiency across varying load conditions. The device provides a fixed output voltage of 3.3 V and is housed in a compact SOT-23-5 package. It features a wide input voltage range, enabling operation from low battery levels up to 5.5 V. The controller includes built-in soft-start functionality to limit inrush current during startup and an enable pin for power management. It is designed for surface-mount installation and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Supports switchable PWM/PFM control modes for enhanced light-load efficiency
• Integrates soft-start circuitry to manage startup inrush currents
• Features an enable pin for precise power supply control

Applications

• Battery-powered portable electronic devices
• Mobile communication equipment
• Consumer electronics requiring efficient step-up regulation

Procurement Notes

Verify the complete part number including suffixes to ensure correct package and temperature grade compatibility. Confirm that the target application voltage ranges align with the specified input limits. Check for RoHS compliance documentation if required by regulatory standards. Ensure PCB layout accommodates the SOT-23-5 footprint and thermal requirements for reliable operation.

Selection Notes

Select this component when a small form factor and high switching frequency are prioritized to minimize external passive component size. The switchable control mode makes it suitable for applications with variable load profiles. Consider the specific output voltage accuracy and quiescent current requirements against alternative series members like the S-8353 or S-8357 if different performance characteristics are needed.

Part Context

This part belongs to the S-8355 series of super-small package step-up switching regulators. The series is characterized by its high switching frequency and flexible control mode options. It is part of ABLIC's portfolio of PMIC solutions designed for space-constrained mobile and industrial applications.

Replacement Considerations

Direct substitutes include other variants within the S-8355 series such as S-8355LXXMC-NAST2G or S-8355M33MC-NAST2G, depending on the required output voltage and specific package suffix. Cross-series replacements like the S-8356 or S-8357 may require design adjustments due to differences in switching frequency and control topology.