Datasheet

LTC3859A
40
3859af
Typical applicaTions
Figure 14. High Efficiency Triple 24V/1V/1.2V Converter from 12V V
IN
3859A F14
LTC3859A
SENSE1
–
SENSE1
+
PGOOD1
TG1
SW1
BOOST1
BG1
V
BIAS
PGND
INTV
CC
TG2
BOOST2
SW2
BG2
SENSE2
+
SENSE2
–
TG3
SW3
BOOST3
BG3
SENSE3
–
SENSE3
+
V
FB1
I
TH1
TRACK/SS1
FREQ
PLLIN/MODE
SGND
RUN1
RUN2
RUN3
V
FB2
I
TH2
TRACK/SS2
V
FB3
I
TH3
SS3
C1
1nF
100k
C
B1
0.1µF
D1
D2
C
BIAS
10µF
C
INT1
4.7µF
C2
1nF
MTOP1
MBOT1
C1
10µF
L1
0.47µH
R
SENSE1
3.5mΩ
C
OUT1
220µF
×2
V
OUT1
1V
8A
MTOP2
MBOT2
C2
10µF
L2
0.47µH
R
SENSE2
3.5mΩ
C
OUT2
220µF
×2
V
OUT2
1.2V
8A
C
B2
0.1µF
MTOP3
MBOT3
L3
3.3µH
R
SENSE2
4mΩ
C3
1nF
D3
C
B3
0.1µF
C
IN
220µF
C
OUT3
220µF
R
B1
28.7k
56pF
V
OUT1
R
A1
115k
R
B2
57.6k
56pF
V
OUT2
R
A2
115k
C
ITH1A
200pF
C
ITH1
1000pF
R
ITH1
3.93k
C
ITH2A
200pF
C
ITH2
1000pF
C
SS2
0.01µF
R
ITH2
3.93k
R
B3
232k
OPT
V
OUT3
R
A3
12.1k
C
ITH3A
220pF
C
ITH3
15nF
C
SS3
0.01µF
R
ITH3
8.66k
C
SS1
0.01µF
MTOP1, MTOP2: RENESAS RJK0305
MBOT1, MBOT2: RENESAS RJK0328
MTOP3, MBOT3: RENESAS HAT2169H
L1, L2: SUMIDA CDEP105-0R4
L3: PULSE PA1494.362NL
C
OUT1
, C
OUT2
: SANYO 2R5TPE220M
C
IN
, C
OUT3
: SANYO 50CE220AX
D1, D2: CMDH-4E
D3: BAS140W
V
OUT3
24V
5A
V
IN
12V
OV3
EXTV
CC