Preliminary Datasheet

LP3315

LP3315– 00 Version1.0 Datasheet

Feb.-2012

www.lowpowersemi.com

Page 2 of 8

Functional pin description

SOT-23-5

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 Vout and

ground as a voltage sense. The feedback voltage is 1250mV.

4

SHDN

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

Vin

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

noise.

Function Block Diagram

VIN

FB

LX

GND

EN

+

+

+

-

-

-