SP4446
High Output Voltage Boost Regulator
LCD Bias Regulator
VIN
SHDN
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
5
4
SP4446
5 Pin SOT-23
1
SW
2
GND
3
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
V
IN
2 to 7V
V
IN
L1
10µH
SW
SP4446
SHDN GND
C1
FB
D1
High
Voltage Output
R1
C2
2.2
µF
4.7µF
R2
Mar28-08
SP4446 High Output Voltage Boost Regulator, LCD Bias Regulator
© 2008 Exar Corporation
1
EXAR [ EXAR CORPORATION ]
