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| LTC3859AL_15 Datasheet, PDF (39/44 Pages) Linear Technology – Triple Output, Buck/Buck/Boost Synchronous Controller with 28A Burst Mode IQ | |||
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typical Applications
LTC3859AL
VOUT1
RA1
34k
33pF
RB1
475k
CITH1A
100pF
CITH1
680pF
RITH1
10k
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
8.8µH
RSENSE1
9mâ¦
VOUT1
12V
3A
COUT1
47µF
VOUT2
RA2
68.1k
15pF
RB2
215k
CITH2
820pF
RITH2
15k
CITH2A
150pF
CSS2
0.1µF
VOUT3
RA3
68.1k
OPT
RB3
787k
CITH3
0.01µF
RITH3
3.6k
CITH3A
820pF
SGND
RUN1
RUN2
RUN3
VFB2
VBIAS
PGND
ITH2
INTVCC
TG2
TRACK/SS2 BOOST2
SW2
BG2
VFB3
SENSE2+
ITH3
SENSE2â
D1
CBIAS
10µF
CINT1
4.7µF
D2
CB2
0.1µF
C2
1nF
C2
10µF
MTOP2 L2
3.2µH
RSENSE2
6mâ¦
MBOT2
VOUT2
3.3V
5A
COUT2
150µF
CSS3
0.1µF
SS3
100k
INTVCC
OV3
MTOP1, MTOP2: VISHAY Si7848DP
MBOT1, MBOT2: VISHAY Si7848DP
MTOP3: BSC027NO4LS
MBOT3: BSCO1BN04LS
L1: SUMIDA CDEP105-8R8M
L2: SUMIDA CDEP105-3R2M
L3: WÃRTH 744325120
COUT1: KEMET T525D476MO16E035
COUT2: SANYO 4TPE150M
CIN, COUT3: SANYO 50CE220LX
D1, D2: CMDH-4E
D3: BAS140W
EXTVCC
TG3
SW3
BOOST3
BG3
SENSE3â
SENSE3+
3859al F13
D3
CB3
0.1µF
C3
1nF
MTOP3 L3
1.2µH
RSENSE2
2mâ¦
MBOT3
VIN
2.5V TO 38V
(START-UP ABOVE 5V)
CIN
220µF
* VOUT3 IS 15V WHEN VIN < 15V,
FOLLOWS VIN WHEN VIN > 15V
Figure 13. High Efficiency Wide Input Range Dual 12V/3.3V Converter
VOUT3
15V*
COUT3
220µF
For more information www.linear.com/3859AL
3859alf
39
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