sc4524a Semtech Corporation, sc4524a Datasheet - Page 4

• Manufacturer Part Number: sc4524a
• Description: Sc4524a 28v 2a Step-down Switching Regulator
• Manufacturer: Semtech Corporation

Electrical Characteristics (Cont.)
Unless otherwise noted, V
Note : 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
= 2V, V
BST
= 5V, V
SS
= 2.2V, -40°C < T
A
= T
J
< 25°C, R
R
R
OSC
OSC
R
R
V
V
V
Conditions
V
= 2.kΩ, V
= 93.kΩ, V
V
OSC
OSC
SS/EN
SS/EN
SS/EN
I
I
SS/EN
V
SW
SW
SS/EN
OSC
FB
= 2.kΩ
= 93.kΩ
= -2.6A
= -2.6A
= 2.kΩ.
= 0 V
= .5 V
Falling
Falling
Rising
= 0 V
FB
FB
= 0
= 0
Min
.04
240
0
0.2
.0
.2
0.6
50
Typ
.3
2.5
35
00
300
230
00
65
.8
.3
0.3
.7
.5
.9
.0
60
2.0
0
Max
.56
50
360
350
70
2.3
0.4
.3
2.8
.2
0
95
Units
MHz
kHz
kHz
mA
µA
µA
µA
ns
ns
°C
°C
V
V
V
V
V
V
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