FAN5361UMP15X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN5361UMP15X is a synchronous step-down switching voltage regulator manufactured by Fairchild Semiconductor, now part of ON Semiconductor. It delivers a fixed output voltage of 1.5 V with a maximum output current of 600 mA. The device operates from an input voltage range of 2.3 V to 5.5 V and supports a switching frequency of 6 MHz. It features a compact 6-UDFN (UMLP) package with an exposed pad for thermal management. The regulator includes internal compensation and protection mechanisms, operating within a temperature range of -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification for improved efficiency
• Fixed 1.5 V output voltage configuration
• Compact 6-UDFN package design
• Integrated thermal protection

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics
• Battery-powered devices
• Embedded systems power supplies
• Mobile communication equipment

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation, as Fairchild Semiconductor products are now distributed under ON Semiconductor branding. Confirm the specific suffix 'UMP15X' corresponds to the 1.5 V fixed output variant in the 6-UDFN package. Ensure compatibility with your board's thermal requirements due to the exposed pad design. Check for RoHS compliance status if required by your manufacturing standards.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.5 V output is required at up to 600 mA from a 2.3–5.5 V input source. The 6 MHz switching frequency allows for smaller external inductors and capacitors compared to lower-frequency alternatives. The synchronous design offers better efficiency than non-synchronous buck regulators. Consider the 6-UDFN package size constraints and thermal dissipation needs for your application layout.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the FAN5361 family of low-power synchronous buck regulators. The family typically includes variants with different fixed output voltages and adjustable versions. These components are designed for space-constrained applications requiring efficient power conversion from single-cell lithium-ion batteries or other low-voltage sources.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements may include other FAN5361 variants with different output voltages if adjustable settings are acceptable. Cross-reference with ON Semiconductor's current product portfolio for updated part numbers, as Fairchild branding has been phased out. Verify pinout and package dimensions match before substitution.