SC1532 查看數據表（PDF） - Semtech Corporation
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SC1532 Datasheet PDF : 9 Pages
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400mA SmartLDOTM with Internal Pass
MOSFET
SC1532
January 3, 2000
ELECTRICAL CHARACTERISTICS (Cont.)
Unless specified, TA = 25°C, VIN1 = 5V, VIN2 = 3.3V, IO = 400mA, CIN1 = 4.7uF, CIN2 = 4.7uF, CO = 4.7uF, Cp=1nF.
Values in bold apply over full operating temperature range.
Parameter
Symbol
Test Conditions
MIN TYP MAX Units
VO
LDO Voltage Accuracy
VIN2 Pass Device On Resis-
tance (Aux. NMOS)(1)(3)
VO
RDS(ON)
IO = 20mA
-1
4.3V ≤ VIN1 ≤ 5.5V, 0mA ≤ IO ≤ 400mA(1) -2
+1 %
+2
3.90V ≤ VIN1 ≤ 4.3V, VIN2 = 3.3V,
3.000
V
0mA ≤ IO ≤ 400mA(1)
VIN1 < 3.9V, 0mA ≤ IO ≤ 400mA
360 500 mΩ
Line Regulation
REG(LINE)
VIN1 = 4.3V to 5.5V
0.3 0.6 %
0.7
Load Regulation
REG(LOAD)
IO = 20mA to 400mA
0.3 0.6 %
0.7
Current Limit (LDO)
Output Current
ILIM
VIN1 = 5V, VIN2 = 0V, VO = 0V
600 975 1200 mA
1400
Over Temperature Protection
High Trip Level
Hysteresis
THI
THYS
VIN1=5V
VIN1=5V
175
ºC
10
ºC
NOTES:
(1) Guaranteed by design.
(2) Recommended source impedance for 5V supply: ≤ 0.125Ω. This will ensure clean transitions between supplies
with no “chattering” (see Applications Information).
(3) Refer to block diagram.
© 2000 SEMTECH CORP.
3
652 MITCHELL ROAD NEWBURY PARK CA 91320
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