Description
The FAN5353 is a step-down switching voltage regulator that delivers an adjustable output from an input voltage supply of 2.7V to 5.5V. Using a proprietary architecture with synchronous rectification, the FAN5353 is capable of delivering 3A at over 85% efficiency. The regulator operates at a nominal fixed frequency of 3MHz, which reduces the value of the external components to 470nH for the output inductor and 10µF for the output capacitor.

Features
■ 3MHz Fixed-Frequency Operation
■ Best-in-Class Load Transient
■ 3A Output Current Capability
■ 2.7V to 5.5V Input Voltage Range
■ Adjustable Output Voltage: 0.8V to VIN•0.9
■ Power Good Output
■ Internal Soft-Start
■ Input Under-Voltage Lockout (UVLO)
■ Thermal Shutdown and Overload Protection
■ 12-lead 3x3.5mm MLP

Applications
■ Set-Top Box
■ Hard Disk Drive
■ Communications Cards
■ DSP Power