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SC4525FEVB датащи(PDF) 4 Page - Semtech Corporation

номер детали SC4525FEVB
подробное описание детали  18V, 3A, 350kHz Step-Down Switching Regulator
PDF  23 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4525FEVB датащи(HTML) 4 Page - Semtech Corporation

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SC4525F
4
Parameter
Conditions
Min
Typ
Max
Units
Minimum Switch On-time
V
IN = 0 V, RSW = 0Ω
70
20
230
ns
Minimum Switch Off-time
V
IN = 6 V, RSW = 6Ω
30
75
30
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
SET = 60.4kΩ
275
350
425
kHz
Foldback Frequency
R
SET = 60.4kΩ, VFB = 0
35
65
00
kHz
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, RSET = 60.4kΩ.



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