Datasheet

LTC3708
28
3708fb
TYPICAL APPLICATIONS
V
CC
5V 5V
TRACK1
BOOST2
BAT54A
BOOST1
LTC3708EUH
TG1 V
RNG1
I
ON1
EXTLPF I
TH1
V
FB1
TRACK2
0Ω 0Ω
BOOST1
0Ω 0Ω
1.2M
59k
1nF
1nF
SENSE1
+
SENSE1
–
RUN/SS SGND
PGND1 BG1
FCB DRV
CC
SW1
TG2
V
CC
V
CC
V
RNG2
I
ON2
INTLPF
I
TH2
V
FB2
PWRGD
BOOST2
SENSE2
+
SENSE2
–
PGND2
BG2
SW2
0.22μF
0.22μF
100pF
C2 10μF 25V
V
IN
604k
30.9k
V
IN
V
CC
V
CC
Si4860DY Si4860DY
Si4860DY
L2
2.2μH
C3 10μF 25V
C4 10μF 25V
Si4860DY
C
OUT1
470μF 2.5V
B240A
L1
2.2μH
1μF
10Ω
*
C1 10μF 25V
100pF
1nF
1nF
15k
15k
10k
10k
10k 1%
10k
1%
100k
5V
100pF
150pF
150pF
0.1μF
V
IN
*
1M
9.09k
10nF
3708 TA03
470pF
100pF
100pF
12.1k 1%
30.1k
1%
10k
1%
6.04k 1%
+
1.8V
6A
9V TO 20V
GND
GND
SGND
RUN/SS
2.2μF
2.2μF
BOOST2
2.2μF 6.3V X5R
V
IN
0Ω 0Ω
B240A
B240A
C
OUT2
470μF 2.5V
+
GND
PGOOD
0.9V
±4A
*SIGNAL GROUND, ROUTED SEPARATELY C
OUT1
, C
OUT2
: SANYO 2R5TPD470M
C1 TO C4: TAIYO YUDEN TMK325BJ106MM L1, L2: SUMIDA CDEP105-2R2MC-88
DDR II Supplies with Transient Coupling