FAN5307SX

Voltage Regulators - DC DC Switching Regulators Overview

The FAN5307SX is a synchronous step-down DC-DC switching regulator manufactured by Fairchild Semiconductor, now part of onsemi. It operates with an input voltage range of 2.5V to 5.5V and delivers a fixed 1.8V output at up to 300mA. The device integrates synchronous rectification for improved efficiency and features a 1MHz switching frequency. It is housed in a compact SOT-23-5 package and supports surface mount installation. The operational temperature range extends from -40°C to 85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification to enhance power conversion efficiency within a compact footprint.
• Utilizes a fixed 1MHz switching frequency to minimize external component size requirements.
• Provides a stable positive output configuration suitable for low-power digital loads.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices requiring efficient voltage regulation
• Battery-powered consumer electronics systems
• Embedded circuits needing stable 1.8V logic supply rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation carefully, as Fairchild Semiconductor operations were acquired by onsemi. Confirm the specific suffix 'X' indicates tape and reel packaging if required for automated assembly. Ensure the fixed 1.8V output variant matches the design requirement, as other voltage options exist within the same family. Check current product status, as availability may vary across distributors.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.8V output is required without external programming resistors. The 300mA current limit suits light-load applications rather than high-power processing units. Consider the SOT-23-5 package constraints for thermal management in dense layouts. Verify that the 5.5V maximum input voltage aligns with the system's power source characteristics.

Voltage Regulators - DC DC Switching Regulators Part Context

This regulator belongs to the FAN5307 series of low-current buck converters designed for space-constrained portable applications. The series offers various fixed output voltages and adjustable configurations. The FAN5307SX specifically denotes the SOT-23-5 packaged version with a fixed 1.8V output, distinguishing it from the MLP or other package variants.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other FAN5307 variants with different output voltages or packages, such as FAN5307MP18X (MLP package) or FAN5307S15X (1.5V output). Cross-reference with onsemi documentation for pin-compatible alternatives within the same regulatory framework.