ACT6357/ACT6358
Rev0, 03-Feb-08
ELECTRICAL CHARACTERISTICS
(V
IN
= V
EN
= 3.3V, T
A
= 25°C, unless otherwise specified.)
PARAMETER
Power Switch Voltage Rating
Input Voltage
Under Voltage Lockout Threshold
Under Voltage Lockout Hysteresis
Supply Current
Supply Current in Shutdown
Maximum On Time
Maximum On Time Constant (K)
Minimum Off Time
V
BC
= 3.3V
FB Feedback Voltage
V
IN
Rising
TEST CONDITIONS
MIN
2.6
2.1
TYP
MAX
40
5.5
UNIT
V
V
V
mV
2.25
80
2.45
Not Switching
Switching
EN = G
V
IN
= 3.3V
K = t
MAXON
× V
IN
220
275
197
98
2.6
0.1
0.25
0.1
4.0
13.2
320
290
207
106
0.16
0.25
0.5
10
5.8
mA
µA
µs
µs × V
450
305
217
114
ns
V
BC
= 1.25V
V
BC
= 0.625V
mV
∆V
FB
/∆V
BC
Ratio
FB Input Current
BC Input Impedance
Switch Current Limit
Switch On Resistance
Switch Leakage Current
Over Voltage Protection Threshold
OV Input Current
EN Logic High Threshold
EN Logic Low Threshold
EN Input Current
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
V
EN
= 0V or 5V
V
FB
= 1V
V
BC
= 0 to 1.25V
ACT6357
ACT6358
V
IN
= 3.3V
V
SW
= 38V, EN = G
V
OV
Rising
V
OV
= 1.5V
1.4
1.11
320
620
V/V
200
nA
kΩ
750
1500
0.9
10
mA
Ω
µA
V
nA
V
0.4
V
µA
°C
°C
0
400
500
1000
0.55
1.21
0
1.31
200
0
160
20
1
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