SC1540 Просмотр технического описания (PDF) - Semtech Corporation
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SC1540 Datasheet PDF : 4 Pages
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300mA AND 500mA LOW DROPOUT
VOLTAGE REGULATORS WITH ENABLE
SC1540
SC1540A
PRELIMINARY - May 1, 2000
ELECTRICAL CHARACTERISTICS
Unless otherwise specified: IO = 0mA to 300mA (500mA for SC1540A), EN = VIN
1.5V Option: VIN = 2.9V to 7.0V
2.5 Option: VIN = 3.9V to 7.0V
3.3V Option: VIN = 4.7V to 7.0V
Values in bold apply over full operating temperature range.
Test Conditions
Parameter
Output Voltage (1)
Symbol
VO
VIN = 5V, IO = 0mA
Line Regulation(1)
Load Regulation(1)
Dropout Voltage(1)(2)
SC1540
SC1540A
Current Limit(1)
SC1540
SC1540A
Quiescent Current
REG(LINE)
REG(LOAD)
VD
ICL
IQ
IO = 10mA
VIN = 5V
IO = 300mA
IO = 500mA
VIN = 5V, EN = VIN
VIN = 5V, EN < 0.25V
Enable Pin Control Voltage
EN
Device OFF
Device ON
Enable Pin Current
IEN
EN = 0V, VIN = 5V (OFF)
EN = VIN = 5V (ON)
Temperature Coefficient
TC
Temperature Stability
TS
RMS Output Noise(3)
VN
Ripple Rejection Ratio(4)
RA
VIN = 5V
NOTES:
(1) Low duty cycle pulse testing with Kelvin connections required.
(2) ∆VOUT, ∆ VREF = 1%
(3) Bandwidth of 10 Hz to 10kHz.
(4) 120Hz input ripple.
Test Limits
Min
Typ
Max Units
0.99|VO| VO 1.01|VO| V
0.98|VO| VO 1.02|VO|
0.035
0.2
%
0.2
0.4
%
1.10
1.30
V
330
mA
550
5
7
mA
10
6
8
µA
10
0.25
0.45
V
(VO+0.5) (VO+0.8)
0.1
1.0
µA
15
25
0.005
%/°C
0.5
%
0.003
60
72
%VO
dB
© 2000 SEMTECH CORP.
2
652 MITCHELL ROAD NEWBURY PARK CA 91320
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