S-8355Q57MC-OXQT2U

Overview

The S-8355Q57MC-OXQT2U is a boost switching controller from ABLIC's S-8355 series, designed for step-up DC/DC conversion. It operates within an input voltage range of 0.9V to 10V and delivers a fixed output voltage of 5.7V. The device features a high switching frequency of 600kHz and supports a maximum duty cycle of 85%. It utilizes a transistor driver output configuration without synchronous rectification or clock synchronization capabilities. The component is housed in a compact SOT-23-5 package and is rated for operation across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a high-frequency 600kHz oscillator to minimize external passive component size.
• Features a wide input voltage operating range suitable for single-cell battery applications.
• Includes an enable control function for power management and system sleep modes.

Applications

• Portable electronic devices requiring efficient step-up power regulation
• Battery-powered systems utilizing single-cell lithium-ion or lithium-polymer sources
• Compact consumer electronics with strict space constraints

Procurement Notes

Verify the specific suffix codes against official datasheets to confirm output voltage and package variations. Ensure compatibility with required input voltage ranges and thermal performance specifications before integration. Confirm RoHS compliance status through manufacturer documentation.

Selection Notes

Select this component when a fixed 5.7V output is required from low-voltage sources. The 600kHz frequency allows for smaller inductors compared to lower-frequency alternatives. Verify that the load current requirements fall within the controller's driving capabilities and that the SOT-23-5 package fits the PCB layout constraints.

Part Context

This part belongs to the ABLIC S-8355 series of boost switching controllers. The series is characterized by high switching frequencies and wide input voltage ranges, targeting portable applications where space and efficiency are critical. The S-8355 variant specifically offers fixed output voltages with standard transistor driver outputs.

Replacement Considerations

Cross-reference with other S-8355 series variants for different fixed output voltages. Check S-8356, S-8357, and S-8358 series for alternative switching frequencies or feature sets if the 600kHz specification is not mandatory.