Datasheet

25
LTC3776
3776fa
TYPICAL APPLICATIO S
U
Figure 16. 2-Phase, Synchronizable, DDR Memory Supplies
SGND
PLLLPF
IPRG2
IPRG1
V
FB1
I
TH1
SW1
R
VIN
10Ω
R
ITH2
15k
C
ITH2
220pF
C
IN
22μF
C
VIN
1μF
V
IN
3.3V
V
IN
R
ITH1
15k
C
ITH1
220pF
C
FF1
100pF
C
LP
10nF
R
LP
15k
R
FB1B
187k
R
FB1A
59k
PGOOD
V
FB2
V
REF
I
TH2
TG2
LTC3776EGN
PGND
TG1
SYNC/SSEN
BG1
PGND
1
24
23
22
21
20
19
18
17
16
15
14
13
C
OUT1
, C
OUT2
: SANYO 4TPB150MC
D1, D2: OPTIONAL SCHOTTKY DIODES
L1, L2: VISHAY IHLP-2525CZ-01
2
3
4
5
6
7
5
12
11
10
9
SENSE1
+
MP1
SW1
SW2
CLK IN
MP2
L1
1.5μH
L2
1.5μH
MN1
Si7540DP
MN2
Si7540DP
RUN/SS
BG2
PGND
SW2
SENSE2
+
C
OUT2
150μF
C
OUT1
150μF
V
DDQ
2.5V
4A
V
TT
1.25V
±4A
3736 F16
+
+
D1
D2