SP4446 Datasheet, PDF (1/10 Pages) Sipex Corporation – High Output Voltage Boost Regulator LCD Bias Regulator

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
V_IN
2 to 7V
C1
4.7µF
L1
D1
10µH
V_IN
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
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