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| LTC3890-3 Datasheet, PDF (37/40 Pages) Linear Technology – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller | |||
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Typical Applications
LTC3890-3
12V SEPIC and 3.3V Step-Down Converter
VOUT1
RB1
100k
RA1
6.98k
CITH1A
47pF
CITH1
10nF
RITH1
12.1k
CSS1
0.01µF
C1
100pF
SENSE1+
SENSE1â
VFB1
PGOOD1
TG1
BG1
SW1
ITH1
BOOST1
LTC3890-3
TRACK/SS1
6.8µF
L1
â¢â¢
10µH
10µH
6.8µF
D2
100Ω
M1
RSNS1
6mΩ
6.8µF
COUT
68µF
VOUT1
12V
2A
INTVCC
RMODE
100k
RFREQ
41.2k
CSS2
0.01µF
VOUT1
CITH2 4.7nF
RITH2
7.15k
VIN
PLLIN/MODE
SGND
EXTVCC
RUN1
RUN2
FREQ
INTVCC
PGND
TG2
TRACK/SS2 BOOST2
SW2
ITH2
BG2
CITH2A 47pF
RA2
31.6k
RB2
100k
VFB2
SENSE2â
C2
1nF
SENSE2+
CINT
4.7µF
D1
CB2 0.1µF
+ CIN
100µF
VIN
5V TO 35V
2.2µF
x3
MTOP2
L2
3.3µH
RSENSE2
4mΩ
MBOT2
VOUT2
3.3V
10A
COUT2
470µF
M1, MBOT1, MBOT2: RJK0651DPB
L1: WÃRTH 7448709100
L2: WÃRTH 7443320330
COUT1: SANYO 16TQC68M
COUT2: SANYO 6TPE470M
D1: DFLS1100
D2: PDS560
38903 TA05a
For more information www.linear.com/3890-3
38903f
37
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