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