LP3302 Datasheet, PDF (1/13 Pages) Lowpower Semiconductor inc – 1.1MHz Fixed-Frequency PWM Operation

Preliminary Datasheet
LP3302
High Performance, Constant Current Switching
Regulator For White LED
General Description
The LP3302 is a 1.1MHz PWM boost switching regulator
designed for constant current white LED driver applications.
The LP3302 can drive a string of up to 8 white LEDs from a
3.2V supply or 21 white LEDs from a 5V supply in series,
ensuring uniform brightness and eliminating several ballast
resistors. The LP3302 implements a constant frequency
1.1MHz PWM control scheme. The high frequency PWM
operation also saves board space by reducing external
component size. To improve efficiency, the feedback
voltage is set to 250mV, which reduces the power
dissipation in the current 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.
Features
 High Efficiency: 88% 　
 1.1MHz Fixed-Frequency PWM Operation
 Maximum Output Voltage up to 29V
 Operating Range : 2.7V to 6V
 Shutdown Supply Current:<1uA 　
 Available in SOT23-6 Package 　
 Built-in Over Voltage Protection 　
 Minimize the External Component
 RoHS Compliant and 100% Lead Pb-Free
Pin Configurations
Ordering Information
LP3302
F:Pb-free
Package Type
B6：SOT23-6
Applications
 WLED Backlight driver
 　OLED Backlight driver
 　PDA
 　DSC
 　Camera Flash WLED driver
LP3302B6F-00 Version 1.0 Datasheet May.-2013 www.lowpowersemi.com
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