FAN5307SX

Voltage Regulators - DC DC Switching Regulators Overview

The FAN5307SX is a synchronous step-down switching regulator manufactured by onsemi, designed for efficient power management in portable and battery-operated devices. It operates with an input voltage range of 2.5 V to 5.5 V and delivers a fixed output voltage of 3.3 V at up to 300 mA. The device integrates a high-side and low-side N-channel MOSFETs for improved efficiency and utilizes a 1 MHz switching frequency to minimize external component size. Housed in a compact SOT-23-5 package, it supports operation from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification using internal N-channel MOSFETs for enhanced conversion efficiency.
• Features a fixed 3.3 V output configuration suitable for powering digital logic and memory components.
• Operates at a 1 MHz switching frequency to allow the use of small inductors and capacitors.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronics requiring stable 3.3 V supply rails
• Battery-powered consumer devices
• Embedded systems with limited board space

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SX' against the official datasheet to confirm the fixed 3.3 V output variant. Ensure compatibility with the SOT-23-5 package footprint. Confirm end-of-life status if long-term availability is required for production.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required within a 2.5 V to 5.5 V input range. Consider the 300 mA current limit and 1 MHz frequency for thermal and layout constraints. Compare against adjustable variants if flexible output voltages are needed instead.

Voltage Regulators - DC DC Switching Regulators Part Context

Part of the FAN5307 series of synchronous buck regulators from onsemi. This family offers various output configurations including adjustable and fixed voltages in different packages like MLP and SOT-23-5. The FAN5307SX specifically denotes the SOT-23-5 packaged version with a fixed 3.3 V output.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct pin-compatible alternatives within the same FAN5307 family or other synchronous buck regulators with similar 3.3 V fixed output and SOT-23-5 packaging. Verify electrical parameters match before substitution.