描述 Description

The FAN5355 device is a high-frequency, ultra-fast transient response, synchronous step-down DC-DC converter optimized for low-power applications using small, low-cost inductors and capacitors. The FAN5355 supports up to 800 mA, 1 A, or 1.1 A load current.

特性 Features

■ 93 Efficiency at 3 MHz

■ 800 mA, 1 A, or 1.1 A Output Current

■ I2C?-Compatible Interface up to 3.4 Mbps

■ 6-bit VOUT Programmable from 0.75 V to 1.975 V

■ 2.7 V to 5.5 V Input Voltage Range

■ 3 MHz Fixed-Frequency Operation

■ Excellent Load and Line Transient Response

■ Small Size, 1 μH Inductor Solution

■ ±2 PWM DC Voltage Accuracy

■ 35 ns Minimum On-Time

■ High-Efficiency, Low-Ripple, Light-Load PFM

■ Smooth Transition between PWM and PFM

■ 37 μA Operating PFM Quiescent Current

■ Pin-Selectable or I2C? Programmable Output Voltage

■ On-the-Fly External Clock Synchronization

■ 10-lead MLP (3 x 3 mm) or 12-bump CSP Packages

Applications

■ Cell Phones, Smart Phones

■ 3G, WiFi?, WiMAX?, and WiBro? Data Cards

■ Netbooks?, Ultra-Mobile PCs

■ SmartReflex?-Compliant Power Supply

■ Split Supply DSPs and μP Solutions OMAP?, XSCALE?

■ Mobile Graphic Processors (NVIDIA?, ATI)

■ LPDDR2 and Memory Modules