APW7108
Typical Application Circuit
1. SSOP-28
VIN
+5V
Bias Supply VCC
C1
4.7mF
D1
BAT54W
D2
BAT54W
VCC
VIN
BOOT1
C2
C8
10mF
10mF
BOOT2
R6
0
R1
0
Q1
APM4412
Q3
APM4412
UGATE1 UGATE2
PHASE1 PHASE2
VOUT2
1.8V
L1
4.7mH
L2
4.7mH
VOUT1
2.5V
C6
C12
0.15mF
0.15mF
C4
150mFx2
C10
150mFx2
C9
4.7mF
C3
4.7mF
ISEN1
ISEN2
Q2
APM4412
R2
1k
R7
1k
Q4
APM4412
LGATE1 LGATE2
PGND1
PGND2
C5
10nF
R3
17.8k
R8
10k
C11
10nF
VOUT1
VSEN1
VOUT2
VSEN2
R4
10k
R9
10k
PG1
PG2
EN2
EN1
SOFT1
SOFT2
OCSET1 OCSET2
C7
10nF
C13
10nF
R5
100k
R10
100k
GND
APW7108
2. QFN4x4-24
VIN
+5V
Bias Supply VCC
C1
4.7mF
D1
BAT54W
VCC
D2
BAT54W
VIN
C2
C8
10mF
10mF
BOOT1
BOOT2
R6
0
R1
0
Q1
APM4412
Q3
APM4412
UGATE1 UGATE2
PHASE1 PHASE2
VOUT2
1.8V
VOUT1
2.5V
L1
4.7mH
L2
4.7mH
C6
0.15mF
C12
0.15mF
C4
150mFx2
C10
150mFx2
C3
4.7mF
C9
4.7mF
ISEN1
ISEN2
Q2
APM4412
R2
1k
R7
1k
Q4
APM4412
LGATE1 LGATE2
PGND
C11
10nF
C5
10nF
R3
17.8k
R8
10k
VOUT1
VSEN1
PG1
VOUT2
VSEN2
PG2
R4
10k
R9
10k
EN1
EN2
SOFT1
SOFT2
C7
10nF
C13
10nF
OCSET
GND
APW7108
R5
100k
Copyright ã ANPEC Electronics Corp.
16
www.anpec.com.tw
Rev. A.4 - Jan., 2009
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
