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SC4525CSETRT Datenblatt(PDF) 4 Page - Semtech Corporation

Teilenummer SC4525CSETRT
Bauteilbeschribung  28V 3A Step-Down Switching Regulator
PDF  22 Pages
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Hersteller  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4525CSETRT Datenblatt(HTML) 4 Page - Semtech Corporation

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SC4525C
4
Parameter
Conditions
Min
Typ
Max
Units
Minimum Switch On-time
50
ns
Minimum Switch Off-time
00
50
ns
Switch Leakage Current
0
µA
Minimum Bootstrap Voltage
I
SW = -3.9A
.8
2.3
V
BST Pin Current
I
SW = -3.9A
00
50
mA
Oscillator
Switching Frequency
R
OSC = 2.kΩ
.04
.3
.56
MHz
R
OSC = 73.2kΩ
230
300
370
kHz
Foldback Frequency
R
OSC = 2.kΩ, VFB = 0
00
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
.2
.4
V
Soft-start Charging Current
V
SS/EN = 0 V
.9
µA
V
SS/EN = .5 V
.6
2.4
3.2
Soft-start Discharging Current
.5
µA
Hiccup Arming SS/EN Voltage
V
SS/EN Rising
2.5
V
Hiccup SS/EN Overload Threshold
V
SS/EN Falling
.9
V
Hiccup Retry SS/EN Voltage
V
SS/EN Falling
0.6
.0
.2
V
Over Temperature Protection
Thermal Shutdown Temperature
65
°C
Thermal Shutdown Hysteresis
0
°C
Note : Switch current limit does not vary with duty cycle.
Electrical Characteristics (Cont.)
Unless otherwise noted, V
IN = 2V, VBST = 5V, VSS = 2.2V, -40°C < TA = TJ < 25°C, ROSC = 2.kΩ.



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