Datasheet > FAN5358

FAN5358

更新时间： 2024-09-17 06:58:43

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		稳压器
页数	文件大小	规格书
13页	626K
描述
2MHz, 500mA, SC70 Synchronous Buck Regulator

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FAN5358 数据手册

September 2009

FAN5358

2MHz, 500mA, SC70 Synchronous Buck Regulator

Features

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.

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

At moderate and light loads, pulse frequency modulation is

used to operate the device in power-save mode with a typical

quiescent current of 25µA. Even with such a low quiescent

current, the part exhibits excellent transient response during

large load swings. In shutdown mode, the supply current

drops below 1µA, reducing power consumption.

Input Under-Voltage Lockout (UVLO)

Thermal Shutdown and Overload Protection

6-lead 2 x 2.2mm SC70

FAN5358 is available in a 6-lead SC70 package.

Applications

Cell Phones, Smart Phones

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

Netbooks^®, Ultra-Mobile PCs

Typical Application

Table 1. External Components for Figure 1

VIN

GND

f_SW

C_IN

C_OUT

C_IN

FAN5358

2MHz

2.2μH

2.2μF

4.7μF

GND

VOUT

C_OUT

Figure 1. FAN5358 Typical Application

Wi-Fi® is a registered trademark of Wi-Fi Alliance Corporation.

WiMax™ is a trademark of WIMAX Forum Corporation.

WiBro® is a registered trademark of Telecommunications Technology Association.

Netbooks® is a registered trademark of Netbooks, Inc.

FAN5358 • Rev. 1.0.1

www.fairchildsemi.com

12 3 4 5 6 7...13

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