FAN5307S15X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN5307S15X is a high-efficiency, low-noise synchronous step-down DC-DC converter manufactured by Fairchild Semiconductor. It operates within an input voltage range of 2.5V to 5.5V and provides a fixed output voltage of 1.5V with a maximum continuous output current of 300mA. The device utilizes a fixed frequency 1MHz PWM operation mode and incorporates Pulse Skip (Power Save) mode for enhanced efficiency under light loads. It features soft start functionality, dynamic output voltage positioning, and excellent load transient response. The component is housed in a compact SOT-23-5 surface-mount package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification architecture ensures high conversion efficiency across varying load conditions
• Integrated Power Save mode optimizes performance by minimizing quiescent current during light-load operations
• Fixed 1MHz switching frequency allows for the use of small external passive components
• Built-in soft start limits inrush current and prevents output voltage overshoot during startup

Voltage Regulators - DC DC Switching Regulators Applications

• Cell phones and mobile communication devices
• Battery-powered portable electronic equipment
• Digital cameras requiring stable low-power supplies
• Low power DSP applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'S15X' confirms the 1.5V fixed output configuration and SOT-23-5 packaging. Confirm RoHS compliance status and check for obsolescence notices as this part may be discontinued. Ensure the supplier provides valid traceability documentation matching Fairchild Semiconductor manufacturing records.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.5V rail is required from a single-cell lithium battery or similar 2.5V-5.5V source. It is suitable for space-constrained designs due to the small SOT-23-5 footprint. Consider alternatives if higher output current than 300mA is needed or if an adjustable output voltage is preferred over the fixed 1.5V setting.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the FAN5307 series of high-efficiency step-down converters. The series includes variants with different fixed output voltages and adjustable options. The 'S' suffix typically denotes the SOT-23-5 package variant, distinguishing it from the MLP package versions within the same functional family.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other FAN5307 variants with compatible output voltages and packages, such as FAN5307MP18X for 1.8V output in an MLP package, though pinout compatibility must be verified. Cross-brand replacements require matching input/output voltage ranges, current capabilities, and package dimensions.