sc4524c Semtech Corporation, sc4524c Datasheet - Page 4

• Manufacturer Part Number: sc4524c
• Description: 28v 2a Step-down Switching Regulator
• Manufacturer: Semtech Corporation

Electrical Characteristics (Cont.)
Unless otherwise noted, V
Note 1: Switch current limit does not vary with duty cycle.
Parameter
Minimum Switch On-time
Minimum Switch Off-time
Switch Leakage Current
Minimum Bootstrap Voltage
BST Pin Current
Oscillator
Switching Frequency
Foldback Frequency
Soft Start and Overload Protection
SS/EN Shutdown Threshold
SS/EN Switching Threshold
Soft-start Charging Current
Soft-start Discharging Current
Hiccup Arming SS/EN Voltage
Hiccup SS/EN Overload Threshold
Hiccup Retry SS/EN Voltage
Over Temperature Protection
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
IN
= 12V, V
BST
= 15V, V
SS
= 2.2V, -40°C < T
J
< 125°C, R
R
R
OSC
OSC
OSC
R
R
V
V
V
Conditions
V
= 12.1kΩ, V
= 73.2kΩ, V
V
OSC
OSC
SS/EN
SS/EN
SS/EN
I
I
SS/EN
= 12.1kΩ.
V
SW
SW
SS/EN
FB
= 12.1kΩ
= 73.2kΩ
= -2.6A
= -2.6A
= 0 V
= 1.5 V
Falling
Falling
Rising
= 0 V
FB
FB
= 0
= 0
Min
1.04
0.95
230
100
0.2
1.6
0.6
35
Typ
2.15
135
100
300
165
1.8
1.3
0.3
1.2
1.9
1.5
1.9
1.0
60
60
2.4
10
Max
1.56
370
250
2.3
0.4
1.4
3.2
1.2
10
95
90
Units
MHz
kHz
kHz
mA
µA
µA
µA
ns
ns
°C
°C
V
V
V
V
V
V
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