MPQ8632 HIGH EFFICIENCY 18V SYNCHRONOUS STEP-DOWN CONVERTER FAMILY FOR 4A TO 20A
TYPICAL APPLICATION (7)
R3
0
VIN
BST
SW
IN
C3
0.1uF
C1A
C1B
C1C C1D
R7
L1
R5
1uH, TOKO FDU1250C-1R0M
10uF 10uF
0.1uF 0.1uF
357K
VOUT
100K
FREQ
+
R1
C2A
220uF/20m
C2B
0.1uF
Ω
13.7K
EN
MPQ8632
FB
SS
VCC
R2
C5
R6
1uF
20K
100K
C6
33nF
PG
AGND
PGND
Figure 13 — Typical Application Circuit with No External Ramp
MPQ8632-10, VIN=12V, VOUT=1V, IOUT=10A, FSW=500kHz
R3
VIN
BST
IN
0
C3
C1A
C1B
C1C C1D
R7
0.1uF
L1
R5
1uH, TOKO FDU1250C-1R0M
10uF 10uF
0.1uF 0.1uF
357K
SW
VOUT
100K
FREQ
C4
C2A
C2B
R4
C2C C2D
C2E
R1
47uF 47uF 47uF
0.1uF 0.1uF
330K
220pF
R9
13.7K
EN
MPQ8632
100
FB
SS
VCC
R2
C5
R6
1uF
20K
100K
C6
33nF
PG
AGND
PGND
Figure 14 — Typical Application Circuit with Low ESR Ceramic Capacitor
MPQ8632-10, VIN=12V, VOUT=1V, IOUT=10A, FSW=500kHz
VIN
BST
IN
0
C3
0.1uF
C1A
C1B
C1C C1D
R7
L1
R5
1uH, TOKO FDU1250C-1R0M
10uF 10uF
0.1uF 0.1uF
357K
SW
VOUT
100K
FREQ
C4
C2A
C2B
R4
C2C C2D
47uF
C2E
R1
47uF 47uF
0.1uF
0.1uF
330K
220pF
CDC
13.7K
EN
MPQ8632
10nF
FB
SS
VCC
R2
C5
R6
1uF
20K
100K
C6
33nF
PG
AGND
PGND
Figure 15 — Typical Application Circuit with Low ESR Ceramic Capacitor
and DC-Blocking Capacitor.
MPQ8632-10, VIN=12V, VOUT=1V, IOUT=10A, FSW=500kHz
MPQ8632 Rev.1.24
8/28/2013
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