FAN5358S712X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN5358S712X is a synchronous step-down DC-DC converter manufactured by onsemi. It provides a fixed 1.2V output with a maximum current of 500mA. The device operates from an input voltage range of 2.7V to 5.5V and utilizes a buck topology. It is housed in a compact 6-pin TSSOP, SC-88, or SOT-363 package. The regulator features a switching frequency of 2MHz and achieves an efficiency of approximately 80%.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck architecture for improved power conversion efficiency
• Fixed 1.2V output configuration suitable for low-voltage digital loads
• Compact surface-mount packaging designed for space-constrained applications

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring stable low-voltage power rails
• Battery-powered devices utilizing single-cell lithium-ion sources
• Embedded systems needing efficient step-down regulation from 3.3V or 5V inputs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation as onsemi, resulting from the Fairchild Semiconductor acquisition. Confirm the specific package variant (TSSOP, SC-88, or SOT-363) matches the design footprint. Check part status as obsolete; ensure alternative sourcing or lifecycle management strategies are in place for production continuity.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.2V output at 500mA is required from a 2.7V to 5.5V input source. The 2MHz switching frequency allows for smaller external passive components compared to lower-frequency regulators. Ensure the thermal performance of the 6-pin package meets the application's heat dissipation requirements under full load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the FAN5358 series of synchronous buck regulators. The suffix '712' indicates the fixed 1.2V output voltage setting. The 'X' typically denotes tape-and-reel packaging. The series is designed for portable applications where efficiency and small form factor are critical constraints.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the part status is listed as obsolete, engineers must consult official obsolescence notices or contact the manufacturer directly for recommended next-generation replacements.