ltc3891 Linear Technology Corporation, ltc3891 Datasheet - Page 28
ltc3891
Manufacturer Part Number
ltc3891
Description
Ltc3891 - Low Iq, 60v Synchronous Step-down Controller
Manufacturer
Linear Technology Corporation
Datasheet
1.LTC3891.pdf
(32 pages)
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APPLICATIONS INFORMATION
LTC3891
28
4V TO 60V
V
IN
MTOP, MBOT: Si7850DP
L1 COILCRAFT SER1360-472KL
C
D1: DFLS1100
OUT
: SANYO 6TPE470M
2200pF
C
22µF
INTV
IN
100pF
41.2k
CC
0.1µF
10k
100k
Figure 12. High Efficiency 3.3V Step-Down Converter
V
PGOOD
RUN
I
EXTV
PLLIN/MODE
FREQ
ITH
TRACK/SS
SGND
SGND
LIM
IN
CC
LTC3891
SENSE
SENSE
BOOST
INTV
PGND
V
SW
BG
TG
CC
FB
+
–
D1
0.1µF
1nF
2.2µF
MTOP
MBOT
4.7µH
L1
R
8m
SENSE
100k
31.6k
3891 F12
C
150µF
OUT
V
3.3V
5A
OUT
3891f
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