LP3311 Datasheet, PDF (2/8 Pages) Lowpower Semiconductor inc – 1.3MHzFixed-Frequency PWM Operation

Preliminary Datasheet
Functional pin description
LP3311
SOT-23-6
1
2
3
4
5
6
Pin Name Pin Function
SW
Switch Pin. Connect this Pin to inductor and catch diode. Minimize the track
area to reduce EMI.
GND
Ground Pin
Feedback Reference Voltage Pin. Series connect a resistor between WLED
FB
and ground as a current sense. Sense the current feedback voltage to set the
current rating.
EN
OVP
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.
Over voltage pin.
Vin
Supply Input Voltage Pin. Bypass 1uF capacitor to GND to reduce the input
noise.
Function Block Diagram
LP3311 – 00 Version 1.0 Datasheet Feb.-2011
www.lowpowersemi.com
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