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| LTC3858 Datasheet, PDF (33/38 Pages) Linear Technology – Low IQ, Dual 2-Phase Synchronous Step-Down Controller | |||
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Typical ApplicationS
High Efficiency Dual 24V/5V Step-Down Converter
RB1
487k
CF1
18pF C1
RA1
1nF
16.9k
CITH1A 100pF
SENSE1+
SENSE1â
VFB1
PGOOD2
PGOOD1
BG1
SW1
RITH1 46k
CITH1 680pF CSS1 0.01µF
RFREQ
60k
CSS2 0.01µF
BOOST1
ITH1
TG1
LTC3858
SS1
ILIM
PHSMD
CLKOUT
PLLIN/MODE
SGND
EXTVCC
RUN1
RUN2
FREQ
VIN
INTVCC
PGND
TG2
BOOST2
SS2
SW2
CITH2 680pF RITH2 17k
ITH2
BG2
100k INTVCC
100k
CB1
0.47µF
D1
CINT
4.7µF
D2
CB2
0.47µF
MBOT1
L1
22µH
MTOP1
RSENSE1
25mΩ
VIN
CIN 28V TO 38V
22µF
MTOP2
L2
RSENSE2
4.3µH 7mΩ
MBOT2
LTC3858
VOUT1
24V
COUT1 1A
22µF
s2
CERAMIC
VOUT2
5V
COUT2 5A
150µF
CITH2A 100pF
RA2
75k
C2
CF2 1nF
15pF
RB2
392k
VFB2
SENSE2â
SENSE2+
COUT2: SANYO 10TPD150M
L1: SUMIDA CDRH105R-220M
L2: SUMIDA CDEP105-4R3M
MTOP1, MTOP2, MBOT1, MBOT2: VISHAY Si7848DP
3858 TA04
3858fa
33
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