Preliminary Datasheet

LP3303

LP3303 –03 Ver. 1.3 Datasheet

Feb.-2009

Page 2 of 7

Functional pin description

SOT-23-6

Pin Name

Pin Function

1

SW

Switch Pin. Connect this Pin to inductor and catch diode. Minimize the track area

to reduce EMI.

2

GND

Ground Pin

3

FB

Feedback Reference Voltage Pin. Series connect a resistor between WLED and

ground as a current sense. Sense the current feedback voltage to set the current

rating.

4

CTRL

Chip Enable (Active High) and dimming Control pin.

5

OUT

Output Pin.Connect to output capacitor and LEDs.Minimize trace between this

pin and output capacitor to reduce EMI.

6

VIN

Supply Input Voltage Pin. Bypass 1uF X5R or X7R capacitor to GND to reduce

the input noise.

Function Block Diagram

Absolute Maximum Ratings

Supply Input Voltage(VIN)-------------------------------------------------------------------------------------------−0.3V to 16V

LX Input Voltage --------------------------------------------------------------------------------------------------------−0.3V to 36V

OUT Pin Voltage---------------------------------------------------------------------------------------------------------−0.3V to 29V

CTRL Pin Voltage-------------------------------------------------------------------------------------------------------−0.3V to 10V

FB Pins -------------------------------------------------------------------------------------------------------------------−0.3V to 2.0V

Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------------ 260°C

Operation Temperature Range ---------------------------------------------------------------------------------

Storage Temperature Range ----------------------------------------------------------------------------------------