®
PRELIMINARY
SP4446
High Output Voltage Boost Regulator LCD Bias Regulator
FEATURES ■ High Output Voltage: Up to 30V...
®
PRELIMINARY
SP4446
High Output
Voltage Boost Regulator LCD Bias Regulator
FEATURES ■ High Output
Voltage: Up to 30V ■ High Efficiency ■ Low Quiescent Current: ~20uA ■ Miniature Package: (5-lead SOT-23) ■ Single Battery Cell Operation ■ Programmable Output
Voltage ■ 1Ω Switch (150mV at 150mA) APPLICATIONS ■ LCD Bias ■ Tuner Pin
Voltage ■ White LED Driver ■ High
Voltage Bias ■ Digital Cameras ■ Cell Phone ■ Battery Backup ■ Handheld Computers
VIN SHDN
5
4
SP4446
5 Pin SOT-23 1
SW
2
GND
3
FB
Now Available in Lead Free Packaging
DESCRIPTION The SP4446 is a micro power Boost Regualtor 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 3V and is capable of generating
voltages as high as 30 Volts. The SP4446 is to be supplied in a SOT-23-5 and permits the construction of complete regulators that occupy < 0.2 square inches of board space. TYPICAL APPLICATION SCHEMATIC
VIN 2 to 7V VIN SP4446 SHDN GND C1 4.7µF R2 FB 2.2 µF L1 10µH SW R1 C2 D1 High
Voltage Output
Rev. 7/14/03
SP4446 High Output
Voltage Boost Regualtor, LCD Bias Regulator
© Copyright 2003 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
VIN ....................................................................... 15V SW
Voltage .............................................. -0.4 to 34V FB
Voltage .......................................................... 2.5V All other pins ............................