LP3301S Datasheet, PDF (2/8 Pages) Lowpower Semiconductor inc – 1.2MHzFixed-Frequency PWM Operation

Preliminary Datasheet LP3301S
Functional pin description
SOT-23-5
1
2
3
4
5
SOT-23-6
1
2
3
Pin Name Pin Function
LX
Switch Pin. Connect this Pin to inductor and catch diode. Minimize the track
area to reduce EMI.
GND
FB
Ground Pin
Feedback Reference Voltage Pin. Series connect a resistor between Vout and
ground as a voltage sense. The feedback voltage is 1250mV.
Chip Enable (Active High). Voltage sensing input to trigger the function of
over voltage protection. Note that this pin is high impedance. There should
4
/SHDN _{be a pull low 100kΩ resistor connected to GND when the control signal is}
floating.
5
SS
Softstar pin. Leave SS open to disable the soft-star function.
6
Vin
Supply Input Voltage Pin. Bypass 1uF capacitor to GND to reduce the input
noise.
Function Block Diagram
LP3301S– 00 Version1.0 Datasheet Feb.-2010
www.lowpowersemi.com
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