SC4525C View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC4525C' PDF : 21 Pages View PDF
Electrical Characteristics (Cont.)
Unless otherwise noted, VIN = 12V, VBST = 15V, VSS = 2.2V, -40°C < TA = TJ < 125°C, ROSC = 12.1kΩ.
Parameter
Conditions
Minimum Switch On-time
Minimum Switch Off-time
Switch Leakage Current
Minimum Bootstrap Voltage
BST Pin Current
Oscillator
ISW = -3.9A
ISW = -3.9A
Switching Frequency
Foldback Frequency
Soft Start and Overload Protection
ROSC = 12.1kΩ
ROSC = 73.2kΩ
ROSC = 12.1kΩ, VFB = 0
ROSC = 73.2kΩ, VFB = 0
SS/EN Shutdown Threshold
SS/EN Switching Threshold
Soft-start Charging Current
Soft-start Discharging Current
VFB = 0 V
VSS/EN = 0 V
VSS/EN = 1.5 V
Hiccup Arming SS/EN Voltage
Hiccup SS/EN Overload Threshold
Hiccup Retry SS/EN Voltage
Over Temperature Protection
VSS/EN Rising
VSS/EN Falling
VSS/EN Falling
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
Note 1: Switch current limit does not vary with duty cycle.
SC4525C
Min
Typ
Max Units
150
ns
100
150
ns
10
µA
1.8
2.3
V
100
150
mA
1.04
1.3
1.56
MHz
230
300
370
kHz
100
250
kHz
35
60
90
0.2
0.3
0.4
V
0.95
1.2
1.4
V
1.9
µA
1.6
2.4
3.2
1.5
µA
2.15
V
1.9
V
0.6
1.0
1.2
V
165
°C
10
°C
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