Preliminary Datasheet

LP3302

LP3302B6F-00

Version 1.0 Datasheet

May.-2013

www.lowpowersemi.com

Page 1 of 13

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.

Ordering Information

LP3302

F:Pb-free

Package Type

B6：SOT23-6

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

Applications





WLED Backlight driver



　OLED Backlight driver



　PDA



　DSC



　Camera Flash WLED driver