LP3315 Datasheet, PDF (2/8 Pages) Lowpower Semiconductor inc – 1.2MHzFixed-Frequency PWM Operation

Preliminary Datasheet
LP3315
Functional pin description
SOT-23-5
1
2
3
4
5
Pin Name
LX
GND
FB
Pin Function
Switch Pin. Connect this Pin to inductor and catch diode. Minimize the track
area to reduce EMI.
Ground Pin
Feedback Reference Voltage Pin. Series connect a resistor between Vout and
ground as a voltage sense. The feedback voltage is 1250mV.
SHDN
Vin
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.
Supply Input Voltage Pin. Bypass 1uF capacitor to GND to reduce the input
noise.
Function Block Diagram
LX
VIN
+
-
+
FB
-
+
EN
-
GND
LP3315– 00 Version1.0 Datasheet Feb.-2012
www.lowpowersemi.com
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