ltc3890 Linear Technology Corporation, ltc3890 Datasheet - Page 34

• Manufacturer Part Number: ltc3890
• Description: 60v Low Iq, Dual, 2-phase Synchronous Step-down Dc/dc Controller
• Manufacturer: Linear Technology Corporation

LTC3890
TYPICAL APPLICATIONS
34
C
18.7k
16.9k
C
R
R
ITH2
ITH1
A2
A1
470pF
680pF
R
60k
FREQ
C
C
C
C
SS2
ITH1A
F1
SS1
487k
R
33pF
100k
0.01μF
B1
R
0.01μF
B2
100pF
R
R
46k
20k
ITH1
ITH2
MTOP1, MTOP2, MBOT1, MBOT2: RJK0651DPB
L1: SUMIDA CDR7D43MN
L2: COILCRAFT SER1360-472KL
C
C
D1, D2: DFLS1100
OUT1
OUT2
: KEMET T525D476MO16E035
: SANYO 6TPE470M
C1
1nF
C2
1nF
High Effi ciency Dual 24V/5V Step-Down Converter
SENSE1
SENSE1
V
ITH1
TRACK/SS1
I
PHSMD
CLKOUT
PLLIN/MODE
SGND
EXTV
RUN1
RUN2
FREQ
TRACK/SS2
ITH2
V
SENSE2
SENSE2
LIM
FB1
FB2
CC
LTC3890
+
–
–
+
PGOOD1
PGOOD2
BOOST1
BOOST2
INTV
PGND
SW1
SW2
BG1
TG1
TG2
BG2
V
CC
IN
100k
100k
C
B2
0.47μF
D1
D2
C
0.47μF
B1
INTV
CC
C
4.7μF
INT
MBOT1
MTOP1
MTOP2
MBOT2
4.7μH
L2
22μH
L1
C
220μF
IN
R
10mΩ
SENSE2
R
25mΩ
SENSE1
V
28V TO 60V
IN
3890 TA05
C
470μF
C
22μF
×2 CERAMIC
OUT2
OUT1
V
5V
5A
OUT2
V
24V
1A
OUT1
3890f