LTC3859_15 Datasheet, PDF (37/42 Pages) Linear Technology – Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller

LTC3859
TYPICAL APPLICATIONS
V_OUT1
R_A1
115k
C_ITH1
1000pF
56pF
C_ITH1A
200pF
R_B1
28.7k
R_ITH1
3.93k
C_SS1
0.01μF
V_OUT2
R_A2
115k
56pF
R_B2
57.6k
C_ITH2
1000pF
R_ITH2
3.93k
C_ITH2A
200pF
LTC3859
V_FB1
SENSE1^–
SENSE1⁺
I_TH1
PGOOD1
TG1
TRACK/SS1
SW1
FREQ
BOOST1
PLLIN/MODE BG1
SGND
RUN1
RUN2
V_BIAS
RUN3
PGND
V_FB2
EXTV_CC
I_TH2
INTV_CC
C_SS2
0.01μF
V_OUT3
R_A3
12.1k
OPT
R_B3
232k
C_ITH3
15nF
R_ITH3
8.66k
C_ITH3A
220pF
C_SS3
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
TG2
TRACK/SS2 BOOST2
SW2
BG2
V_FB3
SENSE2⁺
I_TH3
SENSE2^–
SS3
TG3
OV3
SW3
BOOST3
BG3
SENSE3^–
SENSE3⁺
3859 F14
C1
1nF
100k
C_B1
0.1μF
D1
C_BIAS
10μF
MTOP1
MBOT1
C1
10μF _L1
0.47μH
R_SENSE1
3.5mΩ
V_OUT1
1V
8A
C_OUT1
220μF
s2
C_INT1
4.7μF
D2
C_B2
0.1μF
C2
10μF
MTOP2 L2
0.47μH
R_SENSE2
3.5mΩ
MBOT2
V_OUT2
1.2V
8A
C_OUT2
220μF
s2
C2
1nF
D3
C_B3
0.1μF
C3
1nF
MTOP3 L3
3.3μH
R_SENSE2
4mΩ
MBOT3
C_OUT3
220μF
V_OUT3
24V
5A
V_IN
12V
C_IN
220μF
Figure 14. High Efficiency Triple 24V/1V/1.2V Converter from 12V V_IN
3859fa
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