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TS2940 Datasheet(PDF) 2 Page - Taiwan Semiconductor Company, Ltd

Part No. TS2940
Description  1A Ultra Low Dropout Fixed Positive Voltage Regulator
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Maker  TSC [Taiwan Semiconductor Company, Ltd]
Homepage  http://www.taiwansemi.com
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 2 page
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TS2940
2-6
2003/12 rev. B
Electrical Characteristics
Vin = Vout + 5V, IL = 5mA, Co = 10uF, Ta = 25
oC, unless otherwise specified.
Parameter
Conditions
Min
Typ
Max
Unit
Output Voltage
0.980|Vo|
1.020|Vo|
V
Output Voltage
5mA
≤ IL ≤ 1A,
Vo+5V
≤ Vin ≤ 26V
0.970|Vo|
5.0 / 3.3
2.5 / 1.8
1.030|Vo|
V
Input Supply Voltage
--
--
26
V
Output Voltage Temperature
Coefficient
--
50
150
ppm/
oC
Line Regulation
Vo+2V
≤ Vin ≤ 26V
--
0.05
0.5
%
Load Regulation
5mA
≤ IL ≤ 1A
--
0.2
1.0
%
Dropout Voltage (Note 4)
IL=100mA
IL=500mA
IL=800mA
--
--
--
100
300
600
200
500
800
mV
Quiescent Current (Note 5)
IL=5mA
IL=800mA
--
--
10
30
--
--
mA
Short Circuit Current (Note 6)
Vout=0
--
--
1.5
A
Output Noise,
10Hz to 100KHz, IL=10mA
CL=2.2uF
CL=3.3uF
CL=33uF
--
--
--
500
350
120
--
--
--
uVrms
Thermal Performance
Condition
Package type
Typ
Unit
TO-220
60
TO-263
80
TO-252
150
Thermal Resistance
Junction to Ambient
SOT-223
170
oC/W
Note 1: Absolute Maximum Rating is limits beyond which damage to the device may occur. For guaranteed specifications
and test conditions see the Electrical Characteristics.
Note 2: Maximum positive supply voltage of 60V must be limited duration (<100mS) and duty cycle (<1%).
Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, Tj, the junction to
ambient thermal resistance, θja, and the ambient temperature, Ta. Exceeding the maximum allowable power
dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. The effective
value of θja can be reduced by using a heatsink.
Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its
nominal value measured at 1V differential.
Note 5: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the
ground pin current and output load current.
Note 6: Output current will decrease with increasing temperature, but it will be not dropped below 1A at the maximum
specified temperature.




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