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SC4521 Fiches technique(PDF) 5 Page - Semtech Corporation

No de pièce SC4521
Description  3A Step-Down Switching Regulator with Programmable Soft Start
PDF  18 Pages
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Fabricant  SEMTECH [Semtech Corporation]
Site Internet  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4521 Fiches technique(HTML) 5 Page - Semtech Corporation

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 2007 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC4521
Block Diagram
Typical Characteristic - OCP Limit
FB
COMP
R
Q
S
PWM
-
+
POWER
IN
TRANSISTOR
SLOPE
+
+
+
ISEN
40m
SW
BST
OSCILLATOR
CLK
FREQUENCY
SLOPE COMP
SS
SLOPE
OL
FB
EN
REFERENCE
UVLO
1.6V INTERNAL SUPPLY
EA
HICCUP
Is
Is
GND
FB
COMP
R
Q
S
PWM
-
+
POWER
IN
TRANSISTOR
SLOPE
+
+
+
ISEN
40m
SW
BST
OSCILLATOR
CLK
FREQUENCY
SLOPE COMP
SS
SLOPE
OL
FB
EN
REFERENCE
UVLO
1.6V INTERNAL SUPPLY
EA
HICCUP
Is
Is
GND
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



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