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| LTC3859AL Datasheet, PDF (41/44 Pages) Linear Technology – Triple Output, Buck/Buck/Boost Synchronous Controller with 28μA Burst Mode IQ | |||
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typical Applications
LTC3859AL
VOUT1
RA1
115k
CITH1
2.2nF
CITH1A
100pF
RB1
57.6k
RITH1
5.6k
CSS1
0.1µF
LTC3859AL
VFB1
SENSE1â
SENSE1+
ITH1
PGOOD1
TG1
TRACK/SS1
SW1
FREQ
BOOST1
PLLIN/MODE BG1
C1
1nF
100k
CB1
0.1µF
MTOP1
MBOT1
C1
10µF L1
2.2µH
RSENSE1
9mâ¦
VOUT1
1.2V
3A
COUT1
220µF
VOUT2
RA2
115k
RB2
357k
CITH2
3.3nF
RITH2
9.1k
CITH2A
100pF
SGND
RUN1
RUN2
RUN3
VFB2
ITH2
VBIAS
PGND
INTVCC
D1
CBIAS
10µF
CINT1
4.7µF
D2
C2
10µF
CSS2
0.1µF
VOUT3
RA3
115k
RB3
887k
CITH3
100nF
RITH3
13k
CITH3A
10pF
CSS3
0.1µF
MTOP1, MTOP2: BSZ097NO4LS
MBOT1, MBOT2: BSZ097NO4LS
MBOT3: BSZ097NO4L
L1: WURTH 744311220
L2: WURTH 744314650
L3: COOPER BUSSMANN DRQ125-100
COUT1: SANYO 2R5TPE220MAFB
COUT2: SANYO 4TPE220MAZB
COUT3: SANYO SVPC270M
CIN: SANYO 50CE220LX
D1, D2: CMDH-4E
D3: DIODES INC B360A-13-F
TG2
TRACK/SS2 BOOST2
SW2
BG2
VFB3
SENSE2+
ITH3
SENSE2â
SS3
OV3
EXTVCC
TG3
SW3
BOOST3
BG3
SENSE3â
SENSE3+
3859al F15
CB2
0.1µF
MTOP2 L2
6.5µH
RSENSE2
9mâ¦
MBOT2
VOUT2
3.3V
3A
COUT2
220µF
C2
1nF
D3
C3
10µF
50V
MBOT3
L3
10µH
RSENSE2
9mâ¦
COUT3
270µF
VOUT3
10.5V
1.2A
C3
1nF
Figure 15. High Efficiency 1.2V/3.3V Step-Down Converter with 10.5V SEPIC Converter
VIN
5.8V TO 34V
CIN
220µF
For more information www.linear.com/3859AL
3859alf
41
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