LP3308 Datasheet, PDF (1/9 Pages) Lowpower Semiconductor inc – 1.4MHzFixed-Frequency PWM Operation

Preliminary Datasheet
LP3308
1.4MHz,30V/1.3A High Performance, Boost Converter
General Description
The LP3308 is a 1.4MHz PWM boost switching
regulator designed for constant-voltage boost
applications. The LP3308 can drive a string of up to
30V. The LP3308 implements a constant frequency
1.4MHz PWM control scheme. The high frequency
PWM operation also saves board space by reducing
external component sizes. To improve efficiency, the
feedback voltage is set to 1230 mV, which reduces
the power dissipation in the voltage setting resistor.
Highly integration and internal compensation
network minimizes as 5 external component counts.
Optimized operation frequency can meet the
requirement of small LC filters value and low
operation current with high efficiency.
Ordering Information
LP3308
F: Pb-Free
Package:
B5: SOT23-5
B6: TSOT23-6
Pin Configurations
Features
High Efficiency: 90% 
1.4MHzFixed-Frequency PWM Operation
Maximum Output Voltage up to 30V
Guaranteed 13V/200mA Output with 5V input
Operating Range : 2.7V to 5.5V
Shutdown Supply Current:<1uA 
Programmable Soft-star
Available in TSOT23-6/SOT23-5 Package 
Minimize the External Component
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Panel Bais Voltage supply
OLED Backlight driver
Notebook Computers
Portable Applications
MID/PTV
Typical Application Circuit
Vin
10uH
C1
4.7uF
LP3308
6 _Vin
4 _SHDN
D1
C2
SS0520 4.7uF
3
FB
SS ⁵
C3/NC
100pF
C4
33nF
R1
860K
R2
100K
(TSOT23-6)
(SOT23-5)
Marking information
Please view website.
LP3308– 00 Version1.0 Datasheet Feb.-2010
www.lowpowersemi.com
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