Diodes AP3015/A - Manual (Page 2)

MICRO POWER STEP-UP DC-DC CONVERTER AP3015/A
2
May 2010 Rev. 1. 4 BCD Semiconductor Manufacturing Limited
Data Sheet
Figure 2. Pin Configuration of AP3015/A (Top View)
Pin Description
Pin Number Pin Name Function
1 SW Switch Pin. This is the collector of the internal NPN power switch. Minimize the trace area
connected to this Pin to minimize EMI
2 GND Ground Pin. GND should be tied directly to ground plane for best performance
3 FB Feedback Pin. Set the output voltage through this pin. The formula is V
OUT
=1.23V*(1+R1/
R2). Keep the loop between Vout and FB as short as possible to minimize the ripple and noise,
which is beneficial to the stability and output ripple
4 SHDN Shutdown Control Pin. Tie this pin above 0.9V to enable the device. Tie below 0.25V to turn
off the device
5 V
IN
Supply Input Pin. Bypass this pin with a capacitor as close to the device as possible
Pin Configuration
K Package
(SOT-23-5)
SW
FB
V
IN
SHDN
GND
1
2
3 4
5