Advanced Analog Technology, Inc.
Application Circuit 1 BOOST(step-up)
VDD
AAT1109A
VOUT
C1
L1
D1
R1
-IN
R2
Q1
CE
CE 4 1 -IN
SCP 2 8 FB
VDD
C2
VDD 3 7 OSC
OUT 5 6 GND
Application Circuit 2 (with charge pump)
VDD
AAT1109A
VOUT
C1
L1
D1
R1
-IN
R2
C2
Q1
CE
VDD
VP ≅ 3*Vout
D2
D3
C6
C7
C5
D4
C8
D5
D6
C9
VN ≅ -Vout
C10
D7
CE 4 1 -IN
SCP 2 8 FB
VDD 3 7 OSC
OUT 5 6 GND
AAT1109A
C4
R4
R3
C3
C4
R4
R3
C3
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Advanced Analog Technology, Inc. –
V 0.1