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LTC3522 データシートの表示(PDF) - Linear Technology
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LTC3522
Synchronous 400mA Buck-Boost and 200mA Buck Converters
Linear Technology
LTC3522 Datasheet PDF : 20 Pages
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LTC3522
BLOCK DIAGRAM
8
PV
IN1
*
11 10
SW1A SW1B
A
BC
PGND1 PGND2
12
V
OUT1
+
D
0.85A
–
+
0.250A
–
+
0A
–
I
ZERO
FILTER
0.9V
+
–
PGOOD1
6
V
OUT1
GATE
DRIVES
BUCK-BOOST
PWM
LOGIC
15
PV
IN2
*
INTERNAL
V
CC
OSCILLATOR
UVLO
1.00V
FB1
5
SOFT-START
RAMP
SHDN1
7
PWM
2
SW2
14
GATE
DRIVES
BUCK
PWM
LOGIC
PGND1
0A
+
ZERO CROSSING
–
+
I
LIMIT
0.4A
–
+
SLOPE
COMPENSATION
SHDN2
16
1.00V
0.594V
0.9V
0.548V
BANDGAP
REFERENCE
AND OT
SHUTDOWN
FB2
–
g
m
+
1
+
0.594V
+
–
SOFT-START
RAMP
GND PGND1
3
13
*PV
IN1
AND PV
IN2
MUST BE CONNECTED TOGETHER IN THE APPLICATION.
PGND2
9
0.548V
+
–
PGOOD2
4
3522 BD
3522fa
8
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