LTC3868 Datasheet, PDF (33/38 Pages) Linear Technology – Low IQ, Dual 2-Phase Synchronous Step-Down Controller

Typical ApplicationS
High Efficiency Dual 12V/5V Step-Down Converter
R_B1
475k
C_F1
33pF C1
R_A1
1nF
34k
C_ITH1A 100pF
SENSE1⁺
SENSE1^–
V_FB1
PGOOD2
PGOOD1
BG1
SW1
C_ITH1 680pF
R_FREQ
60k
R_ITH1 10k
C_SS1 0.01µF
C_SS2 0.01µF
BOOST1
I_TH1
TG1
LTC3868
V_IN
SS1
I_LIM
INTV_CC
PHSMD
CLKOUT
PGND
PLLIN/MODE
SGND
EXTV_CC
TG2
RUN1
RUN2
BOOST2
FREQ
SS2
C_ITH2 680pF _{RITH2 17k}
I_TH2
SW2
BG2
100k ^INTVCC
100k
C_B1
0.47µF
D1
C_INT
4.7µF
D2
C_B2
0.47µF
MBOT1
L1
8.8µH
MTOP1
R_SENSE1
9mΩ
V_IN
C_IN ^{12.5V TO 24V}
22µF
MTOP2
L2
R_SENSE2
4.3µH 6mΩ
MBOT2
LTC3868
C_OUT1
47µF
V_OUT1
12V
3A
V_OUT2
5V
C_OUT2 5A
150µF
C_ITH2A 100pF
R_A2
75k
C2
C_{F2 1nF}
15pF
R_B2
393k
V_FB2
SENSE2^–
SENSE2⁺
C_OUT1: KEMET T525D476M016E035
C_OUT2: SANYO 10TPD150M
L1: SUMIDA CDR7D43MN
L2: SUMIDA CDEP105-4R3M
MTOP1, MTOP2, MBOT1, MBOT2: VISHAY Si7848DP
3858 TA02a
3868fb
33