SC2446AEVB 查看數據表（PDF） - Semtech Corporation
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SC2446AEVB Datasheet PDF : 27 Pages
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SC2446A
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless specified: AVCC = 12V, SYNC = 0, ROSC = 51.1kΩ, -40°C < TA = TJ < 125°C
Parameter
Symbol
Conditions
Amplifier Output Sink Current
Amplifier Output Source Current
Channel 2 Error Amplifier
VIN1- = 1V, VCOMP1 = 2.5V
VIN1- = 0, VCOMP1 = 2.5V
Input Common-mode Voltage Range
Inverting Input Voltage Range
Input Offset Voltage
Non-inverting Input Bias Current
Inverting Input Bias Current
Inverting Input Voltage for 2-Phase Single
Output Operation
Amplifier Transconductance
Amplifier Open-Loop Gain
Amplifier Unity Gain Bandwidth
(Note 1)
(Note 1)
0 ~ 70° C
IIN2+
IIN2-
GM2
aOL2
Minimum COMP2 Switching Threshold
Amplifier Output Sink Current
Amplifier Output Source Current
Oscillator
VVCSSS22+In=crVeCaSs2-in=g0
VCOMP2 = 2.5V
VCOMP2 = 2.5V
Channel Frequency
Synchronizing Frequency
SYNC Input High Voltage
SYNC Input Low Voltage
SYNC Input Current
Channel Maximum Duty Cycle
Channel Minimum Duty Cycle
Current-limit Comparators
fCH1, fCH2
0 ~ 70° C
(Note 1)
ISYNC
D D MAX1, MAX2
D D MIN1, MIN2
VSYNC
VSYNC
=
=
0.2V
2V
Input Common-Mode Range
Cycle-by-cycle Peak Current Limit
Valley Current Overload Shutdown
Threshold
VILIM1+,
VILIM2+
SVoCuSr1c- =inVg CMS2o- =de0,.50V~, 70° C
V V ILIM1-, ILIM2-
SVinCkS1in- =g
VMCoSd2-e=,
0.5V,
0 ~ 70°
C
Positive Current-Sense Input Bias Current
Negative Current-Sense Input Bias
Current
I I CS1+, CS2+
I I CS1-, CS2-
VCS1+
VCS2-
==VVCCSS21--
=
=
0
0
VCS1+
VCS2+
=
=
VCS1-
VCS2-
=
=
0
0
Min
0
0
2.5
450
2.1fCH
1.5
0
40
-60
Typ
16
12
1.5
-150
-100
260
65
5
2.2
16
12
500
88
50
-75
-0.7
-0.7
Max Units
µA
µA
3
AVCC
±3
-380
-250
V
V
mV
nA
nA
V
µΩ−1
dΒ
MHz
V
µA
µA
550
KHz
KHz
V
0.5
V
1
µA
50
%
0
%
AVCC - 1 V
60
mV
-90
mV
-2
µA
-2
µA
2005 Semtech Corp.
3
www.semtech.com
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