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200KHz, PWM Buck DC/DC & Linear Controller
Typical Application Circuit (Continued)
(2) VOUT2 Drive NMOS
VCC2=3.3V
VOUT2=1.8V
220µF
NMOS
R1
50
100nF
1 SS/EN
OUT2 8
R2 1nF
100
V CC1
470µ F
PMOS
VOUT1=3.3V
220µ F
R3
47uH
170 Schottcky
R4
100
2 SCP
FB2 7
3 GND
FB1 6
4 OUT1
VCC 5
AP2006
AP2006
10K
V
CC1
220µF
AP2006=> VOUT1=1.25*(1+R3/R4)
VOUT2=1.25*(1+R1/R2)
Anachip Corp.
www.anachip.com.tw
Rev. 1.1 Nov 17, 2004
5/7