SC1537 查看數據表（PDF） - Semtech Corporation
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SC1537 Datasheet PDF : 7 Pages
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700mA SmartLDOTM
SC1537
PRELIMINARY - July 25, 2000
ELECTRICAL CHARACTERISTICS
Unless specified, TA = 25°C, VIN = 5V, VAUX = 3.3V, IO = 700mA, CO = 10µF. Values in bold apply over full operating temperature range.
Parameter
Symbol
Test Conditions
MIN TYP MAX Unit
VAUX (Cont.)
Reverse Leakage From VIN IVAUX
5V Detect(1)(2)(3)
VIN = 5.5V, VAUX = 0V, IO = 0mA
-5.0 -50.0 µA
-
100.0
Low Threshold Voltage
VTH(LO)
VIN Falling, IO = 20mA
3.92 4.05 4.18 V
3.90
4.20
Hysteresis
VHYST
90 170
mV
80
High Threshold Voltage
VO
VTH(HI)
VIN Rising, IO = 20mA
4.35 V
LDO Output Voltage
Output Current
Line Regulation
VO
IO
REG(LINE)
IO = 20mA
3.267
4.75V ≤ VIN ≤ 5.25V, 0mA ≤ IO ≤ 700mA 3.234
VIN = 4.75V to 5.25V
3.300
0.20
3.333 V
3.366
400 mA
0.60 %
0.80
Load Regulation
REG(LOAD)
IO = 10mA to 700mA
0.6
1.0 %
1.2
Drive Output
Drive Voltage
VDR
4.75V ≤ VIN ≤ 5.25V, IDR = 200µA
3.4 VIN - 0.8
V
3.3
VIN < VTH(LO), IDR = -200µA
35
150 mV
250
Peak Drive Current
Drive High Delay(1)(4)
Drive Low Delay(1)(4)
IDR(PK)
Sinking: VIN = 3.9V, VDR = 1V;
7
Sourcing: VIN = 4.35V, VIN - VDR = 2.5V 6
tDH
CDR = 1.2nF, VIN ramping up, measured
from VIN = VTH(HI) to VDR = 2V
tDL
CDR = 1.2nF, VIN ramping down,
measured
mA
0.5
1.0 µs
2.0
0.5
1.0 µs
from VIN = VTH(LO) to VDR = 2V
2.0
NOTES:
(1) Guaranteed by design.
(2) See 5V Detect Thresholds on page 5.
(3) Recommended source impedance for 5V supply: ≤ 0.07Ω. This will ensure that IO x RSOURCE < VHYST, thus
avoiding DR toggling during 5V detect threshold transitions.
(4) See Timing Diagram on page 5.
3
© 2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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