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SC2440AEVB датащи(PDF) 4 Page - Semtech Corporation

номер детали SC2440AEVB
подробное описание детали  Dual 30V Step-Down Switching Regulator with 2A Switches
PDF  28 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC2440AEVB датащи(HTML) 4 Page - Semtech Corporation

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4
Electrical Characteristics (continued)
SC2440A
Parameter
Conditions
Min
Typ
Max
Units
Oscillator and Synchronization
Channel Free-running Frequency
.2
.4
.6
MHz
Minimum Switch Off-time
90
40
ns
SYNC Input High Voltage
2
V
SYNC Input Low Voltage
0.8
V
SYNC Pin Input Current
V
SYNC = 2V
60
75
µA
Power Switch
Switch Current Limit()
2.0
2.6
3.8
A
Switch Saturation Voltage
I
SW = -2A
300
460
mV
Switch Leakage Current
0
µA
Switch Minimum Bootstrap Voltage
I
SW = -2A
.8
2.4
V
BST Pin Current
I
SW = -0.5A
20
30
mA
I
SW = -2A
50
80
mA
Soft-start and Hiccup Overload Protection
Shutdown SS Threshold
V
SS = VSS2
0.5
0.25
0.35
V
Soft-start Charging Current
V
SS = 0
.8
µA
V
SS Rising and VSS = .5V
.0
.8
2.6
µA
Soft-start Discharging Current
In Overload Shutdown, V
SS Falling and VSS = .5V
0.8
µA
SS Switching Threshold
V
FB = 0, VCOMP = .3V, VSS Rising
.2
V
Hiccup Arming SS Voltage
V
SS Rising
2.
V
Hiccup Retry SS Voltage
V
SS Falling
0.7
.0
.3
V
FB Overload Threshold
V
SS = 2.3V, VFB Falling
0.72
V
Output Power Good Indicators
PGOOD Threshold Below FB
V
FB Rising
80
00
20
mV
PGOOD Output Low Voltage
V
FB = 0.8V, IPGOOD = 250µA
0.2
0.4
V
PGOOD Pin Leakage Current
V
PGOOD = 5V
0.

µA
Thermal Protection
Thermal Shutdown Temperature
T
J Rising
60
°C
Thermal Shutdown Hysteresis
8
°C
Notes:
() Switch current limits do not vary with duty cycle.



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