LP38798_15 Datasheet, PDF (10/27 Pages) Texas Instruments – LP38798 High PSRR, Ultra-Low-Noise, 800-mA Linear Voltage Regulator for RF/Analog Circuits

LP38798
SNOSCT6B – MARCH 2013 – REVISED DECEMBER 2014
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Typical Characteristics (continued)
Unless otherwise specified: V_IN = 5.5 V, V_OUT = 5 V, I_OUT = 10 mA, C_OUT = 10 µF MLCC 16 V X7R, and T_J = 25°C.
20
5.5
18
V_EN = 0.0V
16
14
12
10
8
6
4
2
0
0246
125SC
25SC
-40SC
8 10 12 14 16 18 20
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0 2 4 6 8 10 12 14 16
INPUT VOLTAGE, V_IN (V)
C030
INPUT VOLTAGE, V_IN (V)
125SC
25SC
-40SC
18 20
C031
Figure 19. IN Pin Current vs. V_IN
3.0
2.5
Figure 20. V_EN(CLAMP) vs. V_IN
350
125SC
300
25SC
250
-40SC
2.0
200 V_OUT = 3.0V
1.5
150
1.0
125SC
100
0.5
25SC
50
-40SC
0.0
0
0 2 4 6 8 10 12 14 16 18 20
0.01
0.1
1
INPUT VOLTAGE, V_IN (V)
C032
OUTPUT CURRENT (A)
C033
Figure 21. Enable Pin Pull-Up Current vs V_IN
350
125SC
300
25SC
250
-40SC
200 V_OUT = 5.0V
150
100
50
0
0.01
0.1
1
OUTPUT CURRENT (A)
C034
Figure 22. Dropout Voltage vs. Output Current
2.0
1.5
V_IN = 5.5 V
V_OUT = 5.0 V
1.0
I_OUT = 800 mA
Normalized to 25SC
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-50 -25
0
25
50
75
TEMPERATURE, T_J (SC)
100
125
C035
Figure 23. Dropout Voltage vs. Output Current
Figure 24. V_OUT Variation vs. T_J
10
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