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SC2441AEVB Datasheet(PDF) 8 Page - Semtech Corporation

Part # SC2441AEVB
Description  1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC2441AEVB Datasheet(HTML) 8 Page - Semtech Corporation

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 2006 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC2441A
Block Diagram
Figure 2 Functional Diagram of the Step-down Controllers
IN
OSCILLATOR
AND
PHASE
DETECTOR
SLOPE1
+
ILIM1
CLK2
R
Q
S
OL1
Soft-Start
And
Overload
Hiccup
Control 1
UVLO
4.3V/4.5V
Adaptive
Shoot-through
Protection
PWM1
ROSC
CS1+
CS1-
CLK1
-
+
+
REFERENCE
+
-
ISEN1
+
-
S
DSBL1
VCC
BST1
GDH1
GDL1
PGND1
25mV
23
25
24
SS1/EN1
3
21
22
5
1
FB1
11
10
6
4
FAULT
GND
9
COMP1
12
VIN UVLO
0.5V
0.35V
FREQUENCY
DIVIDER
CLK
1.25V
1.6/1.7V
SLOPE COMP
SHDN
SLOPE2
SHDN
SYNC/SHDN
GDH2
GDL2
19
18
PLLF
2
20
BST2
VCC
SLOPE2
I
+
ILIM2
R
Q
S
OL2
Soft-Start
And
Overload
Hiccup
Control 2
PWM2
FB2
CS2-
-
+
+
+
-
ISEN2
+
-
25mV
S
DSBL2
COMP2
15
14
CS2+
16
13
SEL
CLK2
1.25V
-
+
ANALOG
SWITCH
SS2/EN2
17
SEL
A
Y
B
Adaptive
Shoot-through
Protection
EA1
0.5V
-
+
+
1.25V
2R
R
CKOUT
28
TG1ON
1.25V
2R
R
TG2ON
EA2
0.5V
-
+
+
-
1.25V
-
1.25V
CH 1
CH 2
A1
MUX
A2
A3


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