LP3856-ADJ_15 Datasheet, PDF (5/22 Pages) Texas Instruments – 3A Fast Response Ultra Low Dropout Linear Regulators

LP3856-ADJ
www.ti.com
SNVS243E – 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
500
o
125
C
400
25^{o C}
300
-40^{o C}
200
100
0
0
1
2
3
LOAD CURRENT (A)
Figure 3.
Ground Current vs Output Load Current
V_OUT = 5V
4.9
4.85
4.8
4.75
4.7
4.65
4.6
125^oC
25^oC
4.55
4.5
-40^oC
4.45
4.4
0 0.5 1 1.5 2 2.5 3
OUTPUT LOAD CURRENT (A)
Figure 4.
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 4.8
OUTPUT VOLTAGE (V)
Figure 5.
0.01
0.001
-40 -20 0 20 40 60 80 100 125
TEMPERATURE (^oC)
Figure 6.
DC Load Reg. vs Junction Temperature
3
DC Line Regulation vs Temperature
3
2.5
2.5
2
2
1.5
1.5
1
1
0.5
0.5
0
-40 -20 0 20 40 60 80 100 125
JUNCTION TEMPERATURE (^oC)
Figure 7.
0
-40 -20 0 20 40 60 80 100 125
JUNCTION TEMPERATURE (^oC)
Figure 8.
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