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