Description

The FAN5358 is a step-down switching voltage regulator that delivers a fixed output from an input voltage supply of 2.7V to 5.5V. Using a proprietary architecture with synchronous rectification, the device is capable of delivering 500mA and maintaining a very high efficiency of over 80 at load currents as low as 1mA. The regulator operates at a nominal frequency of 2MHz, which reduces the value of the external components to as low as 2.2μH for the output inductor and 4.7µF for the output capacitor.

Features

■ 2MHz Nominal-Frequency Operation

■ 25µA Typical Quiescent Current

■ 500mA Output Current Capability

■ 2.7V to 5.5V Input Voltage Range

■ 1.0 to 1.8V Fixed Output Voltages

■ Low Ripple, Light-Load PFM Mode

■ Internal Soft-Start

■ Input Under-Voltage Lockout (UVLO)

■ Thermal Shutdown and Overload Protection

■ 6-lead 2 x 2.2mm SC70

Applications

■ Cell Phones, Smart Phones

■ 3G, 4G, WiFi®, WiMAX™, and WiBro® Data Cards

■ Netbooks®, Ultra-Mobile PCs