SC1578 データシートの表示（PDF） - Semtech Corporation
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SC1578 Datasheet PDF : 5 Pages
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HIGH-EFFICIENCY STEP-DOWN
DC-DC CONVERTER
January 29, 1998
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, TA = 25°C, VIN = 13V
Parameter
Operation Voltage
Quiescent Current
Shutdown Mode Current
Internal Reference Voltage
Driver Sinking “On resistance”
Conditions
VFB = 1.5V
VSHDN = 0V
Driver Sourcing “On resistance”
Current Sense Comparator
Threshold
Shutdown Threshold
SHDN Pin Leakage Current
Duty Cycle
Oscillator Frequency
1578
1578A
VCS+ = 13V
VSHDN < 15V
VDUTY = VIN
VDUTY = VIN
Min
Typ
4
90
8
1.16
1.22
16
11
42
57
52
57
0.8
1.5
71
225
SC1578
Max Units
24
V
160
µA
20
µA
1.28
V
Ω
Ω
72
mV
62
2.4
V
1
µA
%
kHz
TYPICAL PERFORMANCE CHARACTERISTICS
© 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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