參數(shù)資料
型號: LT3845EFE#TR
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO16
封裝: 4.40 MM, PLASTIC, TSSOP-16
文件頁數(shù): 23/24頁
文件大小: 263K
代理商: LT3845EFE#TR
LT3845
8
3845fb
BLOCK DIAGRAM
+
+
+
+
+
V
IN
UVLO
(<4V)
BST
UVLO
8V
REG
FEEDBACK
REFERENCE
+
1.231V
3.8V
REG
INTERNAL
SUPPLY
RAIL
1
16
15
14
11
2
4
6
3
5
V
IN
V
CC
UVLO
(<6V)
SHDN
V
REF
DRIVE
CONTROL
NOL
SWITCH
LOGIC
DRIVE
CONTROL
BURST_EN
R
B
V
C
SS
SENSE
V
FB
+
V
REF
+
100mV
FAULT
CONDITIONS:
V
IN
UVLO
V
CC
UVLO
V
SHDN
UVLO
A
1V
0.5V
100mV
ERROR
AMP
Burst
Mode
OPERATION
9
SOFT-START
BURST
DISABLE
C
SS
CLAMPED
TO
V
REF
+
V
BE
R
S
Q
OSCILLATOR
SLOPE
COMP
GENERATOR
BOOST
C
BOOST
M1
TG
DRIVER
SW
V
CC
12
BG
PGND
7
SYNC
f SET
R
SET
SENSE
+
3845
FD
BOOSTED
SWITCH
DRIVER
CURRENT
SENSE
COMPARATOR
g
m
–+
+
R
S
Q
+
110mV
REVERSE
CURRENT
INHIBIT
10mV
+
17
SGND
8
M2
C
OUT
V
OUT
R
SENSE
D2
(OPTIONAL)
L1
D1
C
VCC
10
C
IN
V
IN
R
C
C1
R2
R1
R
A
C
SS
C
C2
13
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