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SC4524B датащи(PDF) 4 Page - Semtech Corporation

номер детали SC4524B
подробное описание детали  16V 2A Step-Down Switching Regulator
PDF  18 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4524B датащи(HTML) 4 Page - Semtech Corporation

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SC4524B
4
Parameter
Conditions
Min
Typ
Max
Units
Minimum Switch On-time
135
ns
Minimum Switch Off-time
100
150
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 = 93.1kΩ
240
300
360
kHz
Foldback Frequency
R
OSC = 12.1kΩ, VFB = 0
110
230
350
kHz
R
OSC = 93.1kΩ, VFB = 0
50
100
170
Soft Start and Overload Protection
SS/EN Shutdown Threshold
0.2
0.3
0.4
V
SS/EN Switching Threshold
V
FB = 0 V
1.0
1.13
1.3
V
Soft-start Charging Current
V
SS/EN = 0 V
1.7
µA
V
SS/EN = 1.5 V
1.2
2.0
2.8
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 < TA = TJ < 125°C, ROSC = 12.1kΩ.



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