SC2441A(2006) 查看數據表（PDF） - Semtech Corporation
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SC2441A
(Rev.:2006)
(Rev.:2006)
Semtech Corporation
SC2441A Datasheet PDF : 37 Pages
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SC2441A
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless specified: VIN = 2V, VCC = VBST1 = VBST2 =8V, SYNC/SHDN =2V, ROSC = 51.1kΩ, -40°C < TA = TJ < 105°C
Parameter
Symbol
Conditions
Low-Side Gate Drive Peak Sink Current
(Note 1)
Gate Drive Rise Time
Gate Drive Fall Time
Soft-Start, Overload Shutoff and Enable
CL = 3300pF
CL = 3300pF
Soft-Start Voltage to Enable Overload
Hiccup
Overload Hiccup FB Threshold
Soft-Start Discharge Current
Soft-Start Voltage to Restart After
Overload Shutdown
Channel Disable SS/EN Voltage
VSSEN1,
VSSEN2
VFBOL1,
VFBOL2
ISS1(DIS),
ISS2(DIS)
VSSRST1,
VSSRST2
VSS1 and VSS2 Increasing
VSS1, 2 = 3.5V
FB1 and FB2 Decreasing
VFB1 = VFB2 = 0.3V
VSS1 = VSS2 = 3V
VSS1 and VSS2 Decreasing
SS/EN Threshold for PWM Operation
Boost Converter
VCS1(+) = VCS1(-) = 0
VCS2(+) = VCS2(-) = 0
VIN Start Threshold
VIN Hysteresis
Feedback Pin Bias Current
Feedback Voltage
Feedback Amplifier Transconductance
Feedback Amplifier Open-Loop Gain
Boost Converter Switching Frequency
Maximum Switch Duty Cycle
Boost Converter Switch Saturation Voltage
Boost Switch Leakage Current
Boost Switch Current Limit
Thermal Shutdown
VINTH
VINTL
IFB3
VFB3
GM3
ao3
f
OSC3
DMAX3
VCESAT
ILEAKAGE
ILIMIT
VIN Increasing
1.8V < VIN < 16.5V
ISW = 0.6A
VSW = 12V
Thermal Shutdown Hysteresis
Min
0.35
6
1.23
1.225
85
0.6
Typ
2
30
30
3.3
0.38
9
0.5
1.28
1.73
100
40
1.250
70
50
1
92
0.27
0.8
155
10
Max
0.41
12
0.6
1.33
1.76
250
1.275
5
Units
A
ns
ns
V
V
µA
V
V
V
V
mV
nA
V
µΩ-1
dB
MHz
%
V
µA
A
°C
°C
Notes:
(1) Guaranteed by design not tested in production.
(2) Input current is dominated by the equivalent gate drive current to external MOSFETs in active switching condition.
2006 Semtech Corp.
4
www.semtech.com
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