Preliminary Datasheet

LP3302S

LP3302S –02

Version 1.2 Datasheet

Feb.-2012

www.lowpowersemi.com

Page 3 of 11

Functional pin description

SOT-23-6

TSOT23-6

Pin Name

Pin Function

1

LX

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

EN

Chip Enable (Active High). Voltage sensing input to trigger the function of over

voltage protection. Note that this pin is high impedance. There should be a pull

low 100kΩ resistor connected to GND when the control signal is floating.

5

OUT

OVP Pin. Overvoltage Sense. When VOUT is greater than 27.5V, the internal

N-channel MOSFET turns off until VOUT drops below 27V, then the IC reenters

start. Connect a 1uF capacitor from OUT to GND.

6

VIN

Supply Input Voltage Pin. Bypass 1uF capacitor to GND to reduce the input

noise.

Function Block Diagram