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

Features
■ 3 MHz Fixed-Frequency Operation
■ Best-in-Class Load Transient
■ 3 A Output Current Capability
■ 2.7 V to 5.5 V Input Voltage Range
■ Adjustable Output Voltage: 0.8 V to 90% of VIN
■ Power Good Output
■ Internal Soft-Start
■ Input Under-Voltage Lockout (UVLO)
■ Thermal Shutdown and Overload Protection
■ 12-Lead, 3 x 3.5 mm MLP

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