SP4446 Ver la hoja de datos (PDF) - Exar Corporation

Número de pieza

componentes Descripción

Fabricante

SP4446

High Output Voltage Boost Regulator LCD Bias Regulator

Exar Corporation 

SP4446

High Output Voltage Boost Regulator

LCD Bias Regulator

FEATURES

■ High Output Voltage: Up to 30V

■ High Efficiency

■ Low Quiescent Current: ~20uA

■ Single Battery Cell Operation

■ Programmable Output Voltage

■ 1Ω Switch (150mV at 150mA)

■ Lead Free, RoHS Compliant

Package: 5 Pin SOT-23

VIN

SHDN

5

4

SP4446

5 Pin SOT-23

1

2

3

SW

GND

FB

APPLICATIONS

■ LCD Bias

■ Tuner Pin Voltage

■ White LED Driver

■ High Voltage Bias

■ Digital Cameras

■ Cell Phone

■ Battery Backup

■ Handheld Computers

DESCRIPTION

The SP4446 is a micro power Boost Regulator in a 5-lead SOT-23 package. It is a current

limited, fixed off-time regulator configured for use in boost mode applications. The operating

voltage can be less than 3Volts and is capable of generating voltages as high as 30Volts.

The SP4446 is available in a Lead Free, RoHS compliant package and permits the construction

of complete regulators that occupy < 0.2 square inches of board space.

TYPICAL APPLICATION SCHEMATIC

VIN

2 to 7V

C1

4.7µF

L1

D1

10µH

VIN

SW

R1

SP4446

SHDN GND

FB

R2

High

Voltage Output

C2

2.2 µF

Mar28-08

SP4446 High Output Voltage Boost Regulator, LCD Bias Regulator

1

© 2008 Exar Corporation

Share Link: