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LTC3890 Datasheet, PDF (34/36 Pages) Linear Technology – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller | |||
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LTC3890
TYPICAL APPLICATIONS
High Efï¬ciency Dual 24V/5V Step-Down Converter
RB1
487k
CF1 33pF
RA1
16.9k
CITH1A 100pF
CITH1 680pF
RITH1
46k
CSS1 0.01μF
RFREQ
60k
CSS2 0.01μF
CITH2 470pF
RITH2
20k
RA2
18.7k
RB2
100k
SENSE1+
C1
1nF
SENSE1â
PGOOD1
VFB1
PGOOD2
BG1
SW1
ITH1
BOOST1
LTC3890
TRACK/SS1
TG1
ILIM
PHSMD
CLKOUT
PLLIN/MODE
SGND
EXTVCC
RUN1
RUN2
FREQ
VIN
INTVCC
PGND
TG2
TRACK/SS2 BOOST2
SW2
ITH2
BG2
VFB2
SENSE2â
C2
1nF
SENSE2+
INTVCC
100k
100k
CB1
0.47μF
D1
CINT
4.7μF
D2
CB2 0.47μF
MBOT1 L1
22μH
RSENSE1
25mΩ
MTOP1
VOUT1
24V
1A
COUT1
22μF
Ã2 CERAMIC
CIN
220μF
VIN
28V TO 60V
MTOP2
L2
4.7μH
RSENSE2
10mΩ
MBOT2
VOUT2
5V
5A
COUT2
470μF
MTOP1, MTOP2, MBOT1, MBOT2: RJK0651DPB
L1: SUMIDA CDR7D43MN
L2: COILCRAFT SER1360-472KL
COUT1: KEMET T525D476MO16E035
COUT2: SANYO 6TPE470M
D1, D2: DFLS1100
3890 TA05
3890f
34
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