SC2544 データシートの表示（PDF） - Semtech Corporation
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SC2544 Datasheet PDF : 24 Pages
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SC2544
POWER MANAGEMENT
Electrical Characteristics
o
( C o n t . ) Unless specified: TA = 25 C, VIIN=16V, Fs=200KHz
Parameter
ENABLE
EN Ramp Up Threshold Voltage
EN Ramp Down Threshold Voltage
Soft Start
Soft Start Charge Current
Soft Start Discharge Current
Threshold Voltage for DRVL
Out of Tri-State
Error Amplifier
Voltage Feedback Reference
Input Bias Current
Open Loop Gain (1)
Unity Gain Bandwidth (1)
Output Source/Sink Current
Slew Rate (1)
PWM Comparator to Output Delay (1)
Oscillator
Frequency Range per phase
Oscillator Frequency per phase
Oscillator Ramp Peak Voltage
Oscillator Ramp Valley Voltage
Current Limit
ILIM Source Current
ILIM Offset Voltage
Duty Cycle
PWM 1 & 2 Maximum Duty Cycle
PWM 1 & 2 Minimum Duty Cycle
Test Conditions
Min Typ Max Unit
2
V
0.6
V
84
uA
15
uA
Pull below this level, turning on DRVL
0.65
V
(Turn on low side MOSFET)
TA = -40oC to +85oC
100pF capacitive loading
0.735
0.750
70
3
1
10
75
0.765
2
V
uA
dB
MHz
mA
V/uS
nS
Rosc=73K OHM
100
300 kHz
175
210
245
kHz
2.3
V
1
V
Rosc = 73K OHM
Rosc = 73K OHM
9
10
11
uA
2
mV
90
%
0
%
2005 Semtech Corp.
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www.semtech.com
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