S-8355M31MC-MCQT2U

Overview

The S-8355M31MC-MCQT2U is a boost switching regulator controller manufactured by ABLIC Inc. It operates within an input voltage range of 0.9V to 10V and provides a fixed output voltage of 3.1V. The device utilizes a PWM control method with a typical switching frequency of 600kHz and supports a maximum duty cycle of 85%. Packaged in a compact SC-74A (SOT-753) surface-mount housing, it is designed for operation across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a high-frequency PWM controller optimized for external MOSFET drive applications
• Features a wide input voltage operating range suitable for single-cell battery systems
• Includes an enable pin for precise power management and system state control

Applications

• Portable electronic devices requiring step-up voltage conversion
• Battery-powered equipment utilizing single-cell lithium-ion or lithium-polymer sources
• Embedded systems needing regulated higher voltage rails from low input sources

Procurement Notes

Verify the specific suffix codes against official documentation to confirm exact electrical tolerances and package variants. Ensure compatibility with external components such as inductors and diodes based on the 600kHz switching frequency. Confirm RoHS compliance status through current manufacturer declarations before finalizing procurement specifications.

Selection Notes

Select this component when a fixed 3.1V output is required from inputs as low as 0.9V. The 600kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Verify that the external MOSFET can handle the gate drive requirements and that the thermal design accommodates the expected load currents within the specified temperature range.

Part Context

This part belongs to the S-8355 series of boost switching regulators from ABLIC. The series focuses on efficient power management for portable electronics. The S-8355 models typically integrate the control logic while relying on external power switches, offering flexibility in current handling capabilities.

Replacement Considerations

Check the official datasheet for direct pin-compatible substitutes within the S-8355 family. Verify if other series like S-8351 or S-8353 offer compatible functionality with different fixed output voltages or switching frequencies.