LP3853ET-33 Datasheet, PDF (6/25 Pages) Texas Instruments – LP3853/LP3856 3A Fast Response Ultra Low Dropout Linear Regulators

LP3853, LP3856
SNVS173G – FEBRUARY 2003 – REVISED APRIL 2013
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Typical Performance Characteristics
Unless otherwise specified: T_J = 25°C, C_OUT = 10µF, C_IN = 10µF, S/D pin is tied to V_IN, V_OUT = 2.5V,
V_IN = V_O(NOM) + 1V, I_L = 10 mA.
Dropout Voltage
vs
Output Load Current
600
Ground Current
vs
Output Load Current
V_OUT = 5V
500
400
300
200
100
0
0
o
125
C
25^{o C}
-40^{o C}
1
2
3
LOAD CURRENT (A)
4.9
4.85
4.8
4.75
4.7
4.65
4.6
4.55
4.5
4.45
4.4
0
125^oC
-40^oC
25^oC
0.5 1 1.5 2 2.5 3
OUTPUT LOAD CURRENT (A)
Figure 5.
Figure 6.
Ground Current
vs
Output Voltage
IL = 3A
6
Shutdown I_Q
vs
Junction Temperature
10
5
1
4
3
0.1
2
1
0
1.8 2.3 2.8 3.3 3.8 4.3 5.0
OUTPUT VOLTAGE (V)
Figure 7.
0.01
0.001
-40 -20 0 20 40 60 80 100 125
TEMPERATURE (^oC)
Figure 8.
Errorflag Threshold
vs
Junction Temperature
14
12
10
8
6
4
2
0
-40 -20 0 20 40 60 80 100 125
JUNCTION TEMPERATURE (^oC)
Figure 9.
DC Load Reg.
vs
Junction Temperature
3
2.5
2
1.5
1
0.5
0
-40 -20 0 20 40 60 80 100 125
JUNCTION TEMPERATURE (^oC)
Figure 10.
6
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