SPX2940 查看數據表（PDF） - Exar Corporation
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SPX2940 Datasheet PDF : 10 Pages
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SPX2940
1A Low Dropout Voltage Regulator
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
Input Voltage VIN ................................................... 16V1
Storage Temperature .............................. -65°C to 150°C
Lead Temperature (Soldering, 5 sec) ..................... 260°C
OPERATING RATINGS
Junction Temperature Range ....................-40°C to 125°C
TO-220 Package
Thermal Resistance, Junction to Case (at TA) .......... 4°C/W
TO-263 Package
Thermal Resistance, Junction to Case (at TA) .......... 4°C/W
Note 1: Maximum positive supply voltage of 20V must be
of limited duration (<100ms) and duty cycle (<1%). The
maximum continuous supply voltage is 16V.
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Operating Ambient Temperature of TA = 25°C only; limits applying over the full
Operating Junction Temperature range are denoted by a “•”. Minimum and Maximum limits are guaranteed through test,
design, or statistical correlation. Typical values represent the most likely parametric norm at TA = 25°C, and are provided
for reference purposes only. Unless otherwise indicated, VIN = VIN +1V, IOUT = 10mA, CIN = 6.8µF, COUT = 10µF, TA = 25°C.
Parameter
5.0V version
Output Voltage
Line Regulation
Load Regulation
∆ - Output Voltage
∆
temperature Coefficient
Dropout Voltage2
(except 1.8V version)
Ground Current3
IGNDDO Ground Pin Current at
Dropout
Current Limit
Output Noise Voltage
Min.
Typ.
4.850
5.0
4.750
5.0
0.2
0.3
20
70
280
12
18
1.2
1.5
400
260
Max. Units
Conditions
5.150
5.250
1.0
1.5
100
200
550
25
2.2
V
V
%
%
ppm/°C
mV
mV
mA
mA
mA
A
µVRMS
µVRMS
IOUT=10mA
• 10mA≤IOUT≤1A, 6V≤VIN≤16V
IOUT=10mA, (VOUT +1V)≤VIN≤16V
VIN = VOUT +1V,10mA≤IOUT≤1A
•
• IOUT=100mA
• IOUT=1A
• IOUT=750mA, VIN = VOUT +1V
IOUT=1A
VIN = 0.1V less than specified VOUT
IOUT=10mA,
VOUT = 0V4
10Hz-100KHz, IL=100mA, CL=10µF
10Hz-100KHz, IL=100mA, CL=33µF
Note 2: Dropout voltage is defined as the input to output differential when the output voltage drops to 99% of its normal
value.
Note 3: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the
load current to the ground current.
Note 4: VIN=VOUT(NOMINAL)+1V. For example, use VIN=4.3V for a 3.3V regulator. Employ pulse-testing procedures to minimize
temperature rise.
© 2009 Exar Corporation
2/10
Rev. 2.0.0
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