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SC4524FEVB 데이터시트(PDF) 4 Page - Semtech Corporation

부품명 SC4524FEVB
상세설명  18V 2A Step-Down Switching Regulator
PDF  23 Pages
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제조업체  SEMTECH [Semtech Corporation]
홈페이지  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4524FEVB 데이터시트(HTML) 4 Page - Semtech Corporation

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SC4524F
4
Parameter
Conditions
Min
Typ
Max
Units
Minimum Switch On-time
V
IN = 10V, RSW = 10Ω
70
120
230
ns
Minimum Switch Off-time
V
IN = 6V, RSW = 6Ω
30
75
130
ns
Switch Leakage Current
10
µA
Minimum Bootstrap Voltage
I
SW = -2.6A
1.8
2.3
V
BST Pin Current
I
SW = -2.6A
60
95
mA
Oscillator
Switching Frequency
R
OSC = 12.1kΩ
1.04
1.3
1.56
MHz
R
OSC = 73.2kΩ
230
300
370
kHz
Foldback Frequency
R
OSC = 12.1kΩ, VFB = 0
100
250
kHz
R
OSC = 73.2kΩ, VFB = 0
35
60
90
Soft Start and Overload Protection
SS/EN Shutdown Threshold
0.2
0.3
0.4
V
SS/EN Switching Threshold
V
FB = 0 V
0.95
1.2
1.4
V
Soft-start Charging Current
V
SS/EN = 0 V
1.9
µA
V
SS/EN = 1.5 V
1.6
2.4
3.2
Soft-start Discharging Current
1.5
µA
Hiccup Arming SS/EN Voltage
V
SS/EN Rising
2.15
V
Hiccup SS/EN Overload Threshold
V
SS/EN Falling
1.9
V
Hiccup Retry SS/EN Voltage
V
SS/EN Falling
0.6
1.0
1.2
V
Over Temperature Protection
Thermal Shutdown Temperature
165
°C
Thermal Shutdown Hysteresis
10
°C
Note 1: Switch current limit does not vary with duty cycle.
Electrical Characteristics (Cont.)
Unless otherwise noted, V
IN = 12V, VBST = 15V, VSS = 2.2V, -40°C < TJ < 125°C, ROSC = 12.1kΩ.



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