FAN5361UC19X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN5361UC19X is a synchronous buck regulator manufactured by Fairchild Semiconductor, now part of onsemi. It operates with an input voltage range of 2.3 V to 5.5 V and provides a fixed output voltage of 1.9 V. The device supports a maximum output current of 600 mA and features a switching frequency of 6 MHz. Packaged in a compact 6-pin WLCSP format measuring 0.97 mm x 1.37 mm x 0.378 mm, it is designed for surface mount installation. The component functions within a temperature range of -40 °C to +85 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification topology for improved efficiency
• Fixed-frequency operation at 6 MHz
• Compact WLCSP package for space-constrained designs

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices requiring efficient power management
• Battery-powered systems utilizing single-cell lithium-ion sources
• Embedded applications with strict size limitations

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer status as Fairchild Semiconductor has been acquired by onsemi. Confirm that the specific suffix UC19 corresponds to the 1.9 V fixed output variant. Check datasheets for any revisions or obsolescence notices from the current manufacturer. Ensure compatibility with the intended PCB footprint for the 6-WLCSP package.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.9 V rail is required from a 2.3 V to 5.5 V source. The 600 mA current capability suits moderate load applications. The 6 MHz frequency allows for smaller external passive components compared to lower-frequency regulators. Consider the thermal performance within the small WLCSP package for high-duty cycle operations.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the TinyBuck family of synchronous step-down converters. These regulators are designed to provide high efficiency in minimal footprints. The series typically includes various fixed output voltages and current ratings to cover diverse portable electronics needs. The technology emphasizes low quiescent current and fast transient response.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct pin-compatible substitutes within the same product family offering different output voltages or current ratings. Verify if newer generations from onsemi offer equivalent specifications with updated packaging or enhanced features.