S-8356Q33MC-OYST2U

Overview

The S-8356Q33MC-OYST2U is a CMOS step-up switching regulator controller from the ABLIC S-8356 series. It operates with an input voltage range of 0.9 V to 10 V and provides a fixed output voltage of 3.3 V. The device supports a maximum switch current of 300 mA and utilizes a PWM/PFM switching control circuit. It functions at a switching frequency of 600 kHz with a maximum duty cycle of 85%. The controller is housed in a compact SOT-23-5 package and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates a PWM/PFM switching control circuit that transitions to PFM mode under light loads to maintain high efficiency.
• Supports low-voltage startup starting at 0.9 V, ensuring operation with depleted power sources.
• Features a built-in error amplifier and phase compensation circuit for stable regulation and excellent transient characteristics.

Applications

• Battery-powered portable electronic devices requiring efficient step-up conversion
• Systems utilizing single-cell lithium-ion or alkaline batteries
• Low-power consumer electronics needing compact power management solutions

Procurement Notes

Verify the specific suffix OYST2U against official ABLIC documentation to confirm packaging details and marking codes. Ensure compatibility with external N-channel power MOSFETs regarding gate drive requirements. Confirm RoHS compliance status through the manufacturer's latest environmental declaration before finalizing procurement specifications.

Selection Notes

Select this component when a fixed 3.3 V output is required from variable input sources between 0.9 V and 10 V. The 600 kHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. The PWM/PFM hybrid control is suitable for applications experiencing wide load variations, optimizing efficiency across different operational states.

Part Context

This part belongs to the S-8356 series of step-up switching regulator controllers manufactured by ABLIC Inc. The series is characterized by its super-small package options and high-efficiency control algorithms. It is designed to work with external power MOSFETs to deliver higher output currents than integrated regulators typically provide.

Replacement Considerations

Direct replacements within the same family include S-8356Q33MC-OYUT2U and S-8356Q33MC-OVJT2U, which share identical electrical characteristics but may differ in tape-and-reel packaging configurations. Verify pinout compatibility before substitution.