SC4524A

4

Parameter

Conditions

Min

Typ

Max

Units

Minimum Switch On-time

35

ns

Minimum Switch Off-time

00

50

ns

Switch Leakage Current

0

µA

Minimum Bootstrap Voltage

I

.8

2.3

V

BST Pin Current

I

60

95

mA

Oscillator

Switching Frequency

R

.04

.3

.56

MHz

R

240

300

360

kHz

Foldback Frequency

R

0

230

350

kHz

R

50

00

70

Soft Start and Overload Protection

SS/EN Shutdown Threshold

0.2

0.3

0.4

V

SS/EN Switching Threshold

V

.0

.3

.3

V

Soft-start Charging Current

V

.7

µA

V

.2

2.0

2.8

Soft-start Discharging Current

.5

µA

Hiccup Arming SS/EN Voltage

V

2.5

V

Hiccup SS/EN Overload Threshold

V

.9

V

Hiccup Retry SS/EN Voltage

V

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