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LT1308ACFTR Просмотр технического описания (PDF) - Linear Technology
Номер в каталоге
Компоненты Описание
производитель
LT1308ACFTR
High Current, Micropower Single Cell, 600kHz DC/DC Converters
Linear Technology
LT1308ACFTR Datasheet PDF : 20 Pages
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LT1308A/LT1308B
BLOCK DIAGRAMS
V
IN
6
V
OUT
R1
(EXTERNAL)
FB
FB
2
R2
(EXTERNAL)
V
IN
V
IN
R5
R6
40k
40k
+
Q4
V
C
2V
BE
SHUTDOWN
SHDN
3
g
m
1
–
ERROR
+
LBI
7
+
LBO
Q1
AMPLIFIER
Q2
*
ENABLE
8
×
10
R3
BIAS
–
A1
200mV
–
A4
30k
COMPARATOR
SW
R4
140k
RAMP
GENERATOR
–
+
Σ
+
+
A2
FF
DRIVER
5
R
Q
Q3
S
600kHz
OSCILLATOR
*HYSTERESIS IN LT1308A ONLY
A=3
0.03Ω
4
GND
1308 BD2a
Figure 2a. LT1308A/LT1308B Block Diagram (SO-8 Package)
V
IN
11
V
IN
12
R5
40k
V
OUT
R1
(EXTERNAL)
FB
Q1
FB
2
R2
(EXTERNAL)
V
IN
V
IN
R6
40k
+
g
m
–
ERROR
AMPLIFIER
Q2
×
10
R3
30k
R4
140k
RAMP
GENERATOR
Q4
2V
BE
V
C
1
BIAS
+
Σ
+
SHUTDOWN
+
*
–
A1
LBI
13
+
ENABLE
–
200mV
COMPARATOR
–
FF
+
A2
R
Q
S
A4
DRIVER
600kHz
OSCILLATOR
A=3
*HYSTERESIS IN LT1308A ONLY
Figure 2b. LT1308A/LT1308B Block Diagram (TSSOP Package)
SHDN
3
LBO
14
SW SW SW
8 9 10
Q3
0.03Ω
4567
GND GND GND GND
1308 BD2b
1308abfb
7
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