SC1409 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC1409' PDF : 8 Pages View PDF
1 A Synchronous Switching Regulator SC1409
June 28, 2000
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Ground Differential
Input Voltage
Operating Ambient Temperature Range
Operating Junction Temperature Range
Storage Temperature
Lead Temperature (Soldering) 10 seconds
Thermal Resistance, Junction to Ambient
Thermal Resistance, Junction to Case
ESD Rating (Human Body Model)
Symbol
VCC
PGND to GND
VIN
TA
TJ
TSTG
TL
θ=JA
θ=JC
ESD
Maximum
-0.3 to +7
±1
-0.3 to +7
-40 to +85
-40 to +125
-60 to +150
300
165
40
2
ELECTRICAL CHARACTERISTICS
Unless specified; TA = 25°C, VIN = 5V, VO = 1.8V. Output current = 1A. Per typical application circuit.
Values in bold apply over full operating temperature range.
Parameter
Reference
Symbol
VREF
Conditions
Feedback Bias Current
IFB
Quiescent Current
IQ
Shutdown Quiescent Current
IQ
Current into VCC pin
Io=0mA
Enable = 0V
Min
1.191
1.179
Typ
1.203
10.0
2.0
5.0
Regulation Load
Regulation Line
Oscillator Frequency
REGLOAD
IO = 100mA to 1A
0.5
REGLINE
OSC
FSET=Vin
FSET=GND
425
500
255
300
Max Duty Cycle
δmax
Output Current Limit
IO
Soft start charging current
90
95
1.5
32
EN/SS Shutdown Threshold
UVLO Trip point
Vin Increasing
4.5
Vin decreasing
4.1
RDS(ON)
RDS(ON)
Top side PFET
250
Bottom side NFET
175
Max
1.215
1.227
50.0
4.0
15
10
1.0
0.5
575
345
1.0
375
525
250
350
Units
V
V
V
°C
°C
°C
°C
°C/W
°C/W
kV
Units
V
nA
mA
uA
%
%
kHz
kHz
%
A
uA
V
V
V
mΩ
mΩ
© 2000 SEMTECH CORP.
2
652 MITCHELL ROAD NEWBURY PARK CA 91320
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