FAN5350(2007) データシートの表示（PDF） - Fairchild Semiconductor

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FAN5350
(Rev.:2007)

3MHz, 600mA Step-Down DC-DC Converter in Chip-Scale and MLP Packaging

Fairchild Semiconductor 

July 2007

FAN5350

3MHz, 600mA Step-Down DC-DC Converter in

Chip-Scale and MLP Packaging

Features

ƒ 3MHz Fixed-Frequency Operation

ƒ 16µA Typical Quiescent Current

ƒ 600mA Output Current Capability

ƒ 2.7V to 5.5V Input Voltage Range

ƒ 1.82V Fixed Output Voltage

ƒ Synchronous Operation

ƒ Power-Save Mode

ƒ Soft-Start Capability

ƒ Input Under-Voltage Lockout (UVLO)

ƒ Thermal Shutdown and Overload Protection

ƒ 6-Lead 3 x 3mm MLP

ƒ 5-Bump 1 x 1.37mm WLCSP

Applications

ƒ Cell Phones, Smart-Phones

ƒ Pocket PCs

ƒ WLAN DC-DC Converter Modules

ƒ PDA, DSC, PMP, and MP3 Players

ƒ Portable Hard Disk Drives

Description

The FAN5350 is a step-down switching voltage regulator

that delivers a fixed 1.82V from an input voltage supply

of 2.7V to 5.5V. Using a proprietary architecture with

synchronous rectification, the FAN5350 is capable of

delivering 600mA at over 90% efficiency, while

maintaining a very high efficiency of over 80% at load

currents as low as 1mA. The regulator operates at a

nominal fixed frequency of 3MHz at full load, which

reduces the value of the external components to 1µH for

the output inductor and 4.7µF for the output capacitor.

At moderate and light loads, pulse frequency modulation

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

typical quiescent current of 16µA. Even with such a low

quiescent current, the part exhibits excellent transient

response during large load swings. At higher loads, the

system automatically switches to fixed-frequency

control, operating at 3MHz. In shutdown mode, the

supply current drops below 1µA, reducing power

consumption.

The FAN5350 is available in a 6-lead Molded Leadless

Package (MLP) and a 5-bump Wafer Level Chip Scale

Package (WLCSP).

Ordering Information

Part Number Pb-Free

Operating

Temperature Range

Package

Packing Method

FAN5350UCX

Yes

FAN5350MPX

Yes

-40°C to 85°C

-40°C to 85°C

WLCSP-5 1x1.37mm

MLP-6 3 x 3mm

Tape and Reel(1)

Tape and Reel(1)

Note:

1. Please refer to tape and reel specifications on www.fairchildsemi.com; http://www.fairchildsemi.com/packaging.

© 2007 Fairchild Semiconductor Corporation

FAN5350 Rev. 1.0.1

www.fairchildsemi.com

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