LP3855-ADJ_15 Datasheet, PDF (5/22 Pages) Texas Instruments – 1.5A Fast Response Ultra Low Dropout Linear Regulators

LP3855-ADJ
www.ti.com
SNVS244F – SEPTEMBER 2003 – REVISED APRIL 2013
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 Voltage
I_L = 1.5A
6
500
5
400
4
300
o
125
C
3
25^{o C}
200
-40^{o C}
2
100
1
0
0
0.5
1
1.5
OUTPUT LOAD CURRENT (A)
Figure .
0
1.8 2.3 2.8 3.3 3.8 4.3 4.8
OUTPUT VOLTAGE (V)
Figure 5.
Shutdown I_Q vs Junction Temperature
10
DC Load Reg. vs Junction Temperature
3
2.5
1
2
0.1
1.5
0.01
0.001
-40 -20 0 20 40 60 80 100 125
TEMPERATURE (^oC)
Figure 6.
1
0.5
0
-40 -20 0 20 40 60 80 100 125
JUNCTION TEMPERATURE (^oC)
Figure 7.
DC Line Regulation vs Temperature
3
V_IN
vs
V_OUT Over Temperature
3.0
2.5
2.5
2
2.0
1.5
1
0.5
0
-40 -20 0 20 40 60 80 100 125
JUNCTION TEMPERATURE (^oC)
Figure 8.
1.5
-40^oC
1.0
25^oC
0.5
125^oC
0.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VIN (V)
Figure 9.
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