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LTC3720 Datasheet, PDF (8/24 Pages) Linear Technology – Single Phase VRM8.5 Current Mode Step-Down Controller | |||
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LTC3720
W
FU CTIO AL DIAGRA
2 VON
RON
8 ION
5 FCB
0.7V
2.4V
1µA
1
OST
tON
=
VVON
IION
(10pF)
20k
ICMP
R
SQ
0.8V
â+
F
+
IREV
â
1.4V
VRNG
4
Ã
0.7V
3.3µA
1
240k
ITHB
1V
Q2 Q4
Q6
Q3 Q1
+â 0.8V
Ã4
EA
0.8V
Q5
SS
â+
0.6V
6 ITH RC CC1
19 EXTVCC
4.7V
+â
VIN
20 VIN
+
CIN
0.8V
REF
5V
REG
FCNT
ON
SWITCH
LOGIC
SHDN
OV
BOOST
28
TG
27
SW
26
SENSE+
25
INTVCC
21 +
BG
22
PGND
23
SENSEâ
24
PGOOD
3
CB
M1
L1
DB
CVCC
+
M2
COUT
0.74V
UV
VOSENSE
12
R2
10k Ã5 (ALL VID PINS)
VCC
40k
13 VID0
RUN
SHDN
OV
0.86V
1.2µA 6V
VID
DAC
R1
14 VID1
15 VID2
16 VID3
17 VID4
18 VCC
0.6V RUN/SS 1 CSS VFB 11 9 VFB
SGND 10
7 SGND
3711 FD
3720f
8
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