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SC2440AEVB Datasheet(PDF) 6 Page - Semtech Corporation

Part # SC2440AEVB
Description  Dual 30V Step-Down Switching Regulator with 2A Switches
PDF  28 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC2440AEVB Datasheet(HTML) 6 Page - Semtech Corporation

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background image
6
Block Diagram
IN
3
ROSC
5
R
Q
S
POWER
TRANSISTOR
Q1
ILIM
+
-
18mV
+
+
S
REFERENCE
& THERMAL
SHUTDOWN
1V
ENABLE
SHDN
R
BST1
1
SW1
2
FB1
16
COMP1
15
OSCILLATOR
SLOPE
COMP1
+
-
ISEN
PWM
+
-
+
1.33V
-
GND
17
EA
+
+
-
R
OC
SS1
13
PWM
A1
V1
SS2
12
SYNC
4
SLOPE COMP2
PGOOD1
OUTPUT
READY
-
+
100mV
14
0.73V & 1.26V
6.9mW
FREQUENCY
DIVIDER &
SLOPE COMP
2f
IZ
IZ > 0?
DZ
VREG
INTERNAL
REGULATOR
SOFT-START
AND
OVERLOAD
HICCUP
CONTROL
Figure 2. SC2440A Block Diagram (Channel 1 Shown)
SC2440A



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