LTC3802
28
3802f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
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PolyPhase is a registered trademark of Linear Technology Corporation. No R
SENSE
is a trademark of Linear Technology Corporation.
LINEAR TECHNOLOGY CORPORATION 2004
LT/TP 0404 1K • PRINTED IN USA
TYPICAL APPLICATIO
U
2.5V/15A and 1.8V/15A Outputs with Start-Up Tracking and External Synchronization
BG2
1
4
3
2
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
BOOST2
TG2
SW2
PLLIN
PLLLPF
I
MAX2
CMPIN2
V
CC
COMP2
FB2
PHASEMD
PGOOD
V
INFF
+
+
PV
CC
0.1µF
100Ω
2k
0.1µF
0.1µF
V
CC
EXT
SYNC
10µF
Q1
ZETEX
FZT603
5.6V
MM5Z6V2ST1
D3
BAS40-06LT1
QB1
Si7884DP
×2
QT2
Si7884DP
1.5µF
35V
×8
QT1
Si7884DP
C11
2200pF
C31
1500pF
RATIOMETRIC
TRACKING
C21
330pF
R21
15k
10k
2k
10k
R
IMAX2
62k
R
IMAX1
62k
10k
V
CC
10Ω
V
CC
R31
390Ω
R51
3.16k
C
OUT1
, C
OUT2
: SANYO 4TPD330M
L1, L2: TOKO FDA1254-1R0M
R
B1
3.16k
BG1
BOOST1
TG1
SW1
PGND
I
MAX1
FBT
CMPIN1
COMP1
FB1
SGND
FCB
RUN/SS
C
SS
0.1µF
BURST
CONTINUOUS
D1
B340B
D2
B340B
L1
1µH
+
C
OUT1
330µF
4V ×3
+
C
IN
22µF
35V
×4
V
OUT1
2.5V
15A
V
IN
8V TO 28V
GND
R
T4
10k
R11
10k
R
T5
4.99k
R41
10k
560pF
C
INFF
0.47µF
V
IN
QB2
Si7884DP
×2
L2
1µH
C
OUT2
330µF
4V ×3
R42
10k
R12
10k
R32
390Ω
C32
1500pF
V
OUT2
1.8V
15A
GND
3802 TA02
R
B2
4.99k
R52
4.99k
+
10µF
560pF
0.1µF
C22
330pF
C12
2200pF
R22
15k
0 DEG
LTC3802
90 DEG
POWER DOWN
