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LTC3810-5
工作原理图
INTV
CC
EXTV
CC
N
DRV
INTV
CC
V
IN
5.5V
5V
REG
V
IN
R
UV1
UVIN
13
R
UV2
9V
0.8V
REF
INTV
CC
模式
逻辑
+
–
关闭
NDRV
14
M3
–
V
IN
UV
+
INTV
CC
UV
4.2V
INTV
CC
16
EXTV
CC
15
+
0.8V
MODE / SYNC
5
PLL / LPF
–
+
270μA
8
V
ON
2
R
ON
V
IN
I
ON
31
t
ON
=
1.4V
V
RNG
3
I
TH
’
折返
FB
0.7V
I
TH
6
2.6V
C
C2
R
C
4V
UV
过温
SENSE
0.8V
9
1.5V
SS / TRACK
SHDN
12
–
+
C
C1
– + +
+
F
–
PLL -SYNC
1.4μA
100nA
V
冯
(76pF)
I
离子
R
S
Q
–
–
TIMEOUT
逻辑
DRV关闭
FCNT
ON
5.5V
+
ON
+
+
D
B
V
IN
–
4.7V
BOOST
27
TG
26
SW
25
SENSE
+
24
DRV
CC
C
B
+
C
IN
M1
+
I
CMP
20k
+
I
转
开关
逻辑
L1
V
OUT
–
–
SHDN
OV
17
BG
18
BGRTN
C
VCC
M2
+
C
OUT
×
19
SENSE
–
20
PGOOD
4
R
FB1
+
–
0.72V
V
FB
7
EA
故障
RUN
SHDN
+
OV
R
FB2
SGND
12
0.88V
–
38105 FD
38105fc
11
