FAN5355MP00X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN5355MP00X is a synchronous step-down DC-DC converter manufactured by Fairchild Semiconductor. It operates with an input voltage range of 2.7V to 5.5V and provides a fixed output voltage of 0.9V. The device supports a maximum load current of 1A and utilizes a 3MHz switching frequency for efficient power conversion. It features a digitally programmable interface compatible with I2C protocols, allowing for precise voltage adjustments. The component is housed in a compact 10-lead MLP (3mm x 3mm) or 12-bump CSP package, designed for space-constrained portable applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification architecture ensures high efficiency across varying load conditions
• Integrated I2C-compatible interface enables digital programming and dynamic voltage scaling
• Optimized for ultra-fast transient response to handle rapid processor load changes
• Supports smooth transition between PWM and PFM modes to minimize light-load quiescent current

Voltage Regulators - DC DC Switching Regulators Applications

• SmartReflex-compliant power supply systems
• Portable media players and digital cameras
• Cell phones and smart phones
• Micro DC-DC converter modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix designation against the manufacturer's official datasheet to confirm pinout compatibility and electrical tolerances. Ensure that the ordering information matches the exact package type required for the target PCB layout. Cross-reference the revision level to guarantee alignment with existing design specifications and regulatory compliance standards.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when a fixed 0.9V output is required for low-power digital logic or memory interfaces. The 1A current capability suits applications with moderate peak demands without requiring external passives larger than 1μH. Consider the 3MHz frequency for minimizing passive component size while maintaining acceptable ripple levels in noise-sensitive environments.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the TinyBuck family of regulators, which are engineered for high-frequency operation and minimal footprint. The series integrates control circuitry and power switches into a single small package, reducing the bill of materials and simplifying board layout compared to discrete solutions. It targets the mobile and handheld electronics market where space and battery life are critical constraints.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other models within the FAN5355 series offering identical 0.9V output and 1A current ratings. Verify pin-to-pin compatibility before substitution to ensure seamless integration without modifying the existing schematic or PCB traces.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the FAN5355MP00X support dynamic voltage scaling?

Yes, the device includes an I2C-compatible interface that allows for digital programming and on-the-fly adjustment of the output voltage settings.

What is the minimum operating temperature for this regulator?

The component is rated for operation down to -40°C, making it suitable for industrial and automotive-grade portable applications.