Preliminary Datasheet

LP3301

LP3301-datasheet

Dec.-2005

2

Functional Pin Description

SOT-23-5

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. Connect R1 and R2 resistor divider here.

Calculate the Output Voltage according to the formua:Vout=1.25*(1+R1/R2).

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