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SC2441ITSTRT датащи(PDF) 8 Page - Semtech Corporation

номер детали SC2441ITSTRT
подробное описание детали  Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter
PDF  35 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC2441ITSTRT датащи(HTML) 8 Page - Semtech Corporation

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 2005 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC2441
Block Diagram
Figure 2
IN
SYNC/SHDN
OSCILLATOR
EA1
SLOPE1
I
+
ILIM1
CLK2
R
Q
S
OL
Soft-Start
And
Overload
Hiccup
Control 1
UVLO
4.45/4.65V
Step-down Controllers Functional Diagram
Non-Overlapping
Conduction
Control
PWM1
ROSC
FB1
CS1+
CS1-
CLK1
-
+
-
+
+
REFERENCE
0.5V
+
-
ISEN1
+
-
50mV
Σ
DSBL
VCC
BST1
GDH1
PVIN
GDL1
PGND
SS1/EN1
COMP1
VPN1
28
23
25
26
24
3
21
22
5
1
11
10
6
4
FAULT
GND
9
12
VIN UVLO
0.5V 0.36V
FREQUENCY
DIVIDER
CLK
1.25V
1.60/1.74V
SLOPE COMP
SHDN
SLOPE2
SHDN
Non-Overlapping
Conduction
Control
GDH2
GDL2
SS2/EN2
VPN2
19
18
2
17
20
BST2
VCC
PVIN
EA2
SLOPE2
I
+
ILIM2
R
Q
S
OL
Soft-Start
And
Overload
Hiccup
Control 2
PWM2
FB2
CS2+
CS2-
-
+
-
+
+
0.5V
+
-
ISEN2
+
-
50mV
Σ
DSBL
COMP2
15
14
16
FAULT
13
SEL
CLK2
1.25V
-
+
ANALOG SWITCH
SEL
A
Y
B



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