LTC3425
24
3425f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2003
LT/TP 0803 1K PRINTED IN USA
TYPICAL APPLICATIO
U
10MHz, High Current, Very Low Profile, 8-Phase Converter Using Two LTC3425s Operating
in Fixed Frequency Mode with Forced CCM (Max Component Height = 1.6mm)
L5
1µH
C
IN2
2.2µF
R6
75k
R
T2
14.7k
R
F4
17.4k
R
F3
10.2k
L6
1µH
L7
1µH
L8
1µH
C
IN1,2
: TAIYO YUDEN JMK107BJ225MA
C
OUT
: TAIYO YUDEN JMK212BJ475MG (×8)
L1 TO L8: MURATA LQH32CN1R0M51
V
IN
SWA SWB
LTC3425
SWC SWD
SGND
SHDN
V
OUTS
V
OUTA
V
OUTB
V
OUTC
V
OUTD
REFOUT
CCM
REFEN
SYNCIN
BURST
R
T
I
LIM
PGOOD
SYNCOUT
SS
FB
COMP
GNDA GNDB GNDC GNDD
C1
330pF
3425 TA05
C
OUT2
4.7µF
×4
C
SS
0.022µF
R3
33k
R
F2
17.4k
R4
100k
PGOOD
R
F1
10.2k
V
OUT
3.3V
5A
L1
1µH
C
IN1
2.2µF
R5
75k
R
T1
12.1k
L2
1µH
L3
1µH
L4
1µH
V
IN
V
OUT
V
IN
2.5V
SWA SWB
LTC3425
SWC SWD
SGND
SHDN
V
OUTS
V
OUTA
V
OUTB
V
OUTC
V
OUTD
REFOUT
CCM
REFEN
SYNCIN
BURST
R
T
I
LIM
PGOOD
SYNCOUT
SS
FB
COMP
GNDA GNDB GNDC GNDD
C
OUT1
4.7µF
×4
V
OUT
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DC/DC Controller
