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SC4520 датащи(PDF) 5 Page - Semtech Corporation

номер детали SC4520
подробное описание детали  3A Step-Down Switching Regulator with Adjustable Switching Frequency
PDF  12 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4520 датащи(HTML) 5 Page - Semtech Corporation

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 2006 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC4520
Block Diagram
FB
COMP
R
Q
S
PWM
-
+
POWER
IN
TRANSISTOR
SLOPE
+
+
+
ISEN
40m
SW
BST
OSCILLATOR
CLK
FREQUENCY
SLOPE COMP
SYNC
SLOPE
OL
FB
EN
REFERENCE
1V
UVLO
0.7V
EA
SOFT START
HICCUP
Is
Is
GND
FB
COMP
R
Q
S
PWM
-
+
POWER
IN
TRANSISTOR
SLOPE
+
+
+
ISEN
40m
SW
BST
OSCILLATOR
CLK
FREQUENCY
SLOPE COMP
SYNC
SLOPE
OL
FB
EN
REFERENCE
1V
UVLO
0.7V
EA
SOFT START
HICCUP
Is
Is
GND
FSET
Typical Characteristic - OCP Limit
SC4519H OCP Limit vs Duty Cycle
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
0
2040
6080
100
Duty Cycle (%)
ILIM @-40C
ILIM @25C
ILIM @125C
Rosc = 0



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