FAN5307MPX

Voltage Regulators - DC DC Switching Regulators Overview

The FAN5307MPX is a high-efficiency, low-noise synchronous PWM current mode and Pulse Skip (Power Save) mode DC-DC converter manufactured by Fairchild Semiconductor. Designed for battery-powered applications, it delivers up to 300mA of output current over an input voltage range of 2.5V to 5.5V. The output voltage is adjustable from 0.7V to VIN via an external divider or available as fixed options. It operates at a fixed frequency of 1MHz PWM and features soft start, dynamic output voltage positioning, and a quiescent current of 15µA. The component is housed in a 6-lead MLP 3x3mm package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous operation with up to 95% efficiency
• Adjustable output voltage from 0.7V to VIN
• Fixed frequency 1MHz PWM operation
• High efficiency Power Save Mode

Voltage Regulators - DC DC Switching Regulators Applications

• Pocket PCs
• PDAs
• Cell Phones
• Battery-Powered Portable Devices
• Digital Cameras

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer status carefully, as Fairchild Semiconductor's semiconductor division was acquired by onsemi. Confirm whether the specific FAN5307MPX part number is still actively produced or if it has been superseded by newer equivalents within the current product portfolio. Ensure compatibility with existing designs before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for portable electronics requiring efficient step-down conversion from a single-cell lithium-ion battery source. It is suitable for space-constrained designs due to its small MLP package. Consider the 300mA current limit and 1MHz switching frequency when designing the external inductor and capacitor values for optimal transient response and noise performance.

Voltage Regulators - DC DC Switching Regulators Part Context

The FAN5307 belongs to the FAN530x series of high-efficiency step-down DC-DC converters. It shares architectural similarities with the FAN5308 but offers lower output current capability (300mA vs 800mA). This series is targeted at mobile and handheld devices where power conservation and compact form factors are critical design constraints.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct replacements within the onsemi portfolio, such as the FAN5308MPX for higher current needs. Verify pin-to-pin compatibility and electrical parameter overlaps with any suggested substitutes to ensure seamless integration into existing PCB layouts.