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| LTC3859_15 Datasheet, PDF (35/42 Pages) Linear Technology – Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller | |||
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LTC3859
TYPICAL APPLICATIONS
VOUT1
RA1
68.1k
OPT
RB1
357k
CITH1A
100pF
CITH1
1500pF
RITH1
15k
CSS1
0.1μF
VOUT2
RA2
68.1k
10pF
RB2
649k
CITH2
2.2nF
RITH2
15k
CITH2A
68pF
CSS2
0.1μF
VOUT3
RA3
68.1k
OPT
RB3
499k
CITH3
0.01μF
RITH3
3.6k
CITH3A
820pF
CSS3
0.1μF
MTOP1, MTOP2: BSZ097NO4LS
MBOT1, MBOT2: BSZ097NO4LS
MTOP3: BSC027NO4LS
MBOT3: BSCO1BN04LS
L1: WÃRTH 744314490
L2: WÃRTH 744314650
L3: WÃRTH 744325120
COUT1: SANYO 6TPB220ML
COUT2: SANYO 10TPC68M
CIN, COUT3: SANYO 50CE220LX
D1, D2: CMDH-4E
D3: BAS140W
LTC3859
VFB1
SENSE1â
SENSE1+
ITH1
PGOOD1
TG1
TRACK/SS1
SW1
FREQ
BOOST1
PLLIN/MODE BG1
SGND
RUN1
RUN2
VBIAS
RUN3
PGND
VFB2
EXTVCC
ITH2
INTVCC
TG2
TRACK/SS2 BOOST2
SW2
BG2
VFB3
SENSE2+
ITH3
SENSE2â
SS3
TG3
SW3
OV3
BOOST3
BG3
SENSE3â
SENSE3+
3859 F12
C1
1nF
100k
CB1
0.1μF
D1
CBIAS
10μF
CINT1
4.7μF
D2
CB2
0.1μF
MTOP1
MBOT1
C1
10μF L1
4.9μH
RSENSE1
6mΩ
VOUT1
5V
5A
COUT1
220μF
C2
10μF
MTOP2 L2
6.5μH
RSENSE2
8mΩ
MBOT2
VOUT2
8.5V
3A
COUT2
68μF
C2
1nF
D3
CB3
0.1μF
MTOP3 L3
1.2μH
RSENSE2
2mΩ
MBOT3
VIN
2.5V TO 38V
(START-UP ABOVE 5V)
CIN
220μF
VOUT3
10V*
COUT3
220μF
C3
1nF
* VOUT3 IS 10V WHEN VIN < 10V,
FOLLOWS VIN WHEN VIN > 10V
Figure 12. High Efï¬ciency Wide Input Range Dual 5V/8.5V Converter
3859fa
35
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