LP38798 Datasheet, PDF (9/23 Pages) Texas Instruments – LP38798-ADJ High PSRR, Ultra Low Noise, 800 mA Linear Voltage Regulator for RF/Analog Circuits

LP38798
www.ti.com
SNOSCT6A – MARCH 2013 – REVISED MAY 2013
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Unless otherwise specified: V_IN = 5.5V, V_OUT = 5.0 V, I_OUT = 10 mA, C_OUT = 10 µF MLCC 16V X7R, T_J = 25°C.
20
5.5
18
V_EN = 0.0V
16
14
12
10
8
6
4
2
0
0246
125ƒC
25ƒC
-40ƒC
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
Figure 20. IN pin Current vs. V_IN
INPUT VOLTAGE, V_IN (V)
Figure 21. V_EN(CLAMP) vs. V_IN
125ƒC
25ƒC
-40ƒC
18 20
C031
3.0
2.5
2.0
1.5
1.0
125ƒC
0.5
25ƒC
-40ƒC
0.0
0 2 4 6 8 10 12 14 16 18 20
INPUT VOLTAGE, V_IN (V)
C032
Figure 22. Enable pin Pull-up Current vs V_IN
350
125ƒC
300
25ƒC
250
-40ƒC
200 V_OUT = 3.0V
150
100
50
0
0.01
0.1
1
OUTPUT CURRENT (A)
C033
Figure 23. Dropout Voltage vs. Output Current
350
125ƒC
300
25ƒC
250
-40ƒC
200 V_OUT = 5.0V
150
100
50
0
0.01
0.1
1
OUTPUT CURRENT (A)
C034
Figure 24. 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 25ƒC
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-50
-25
0
25
50
75 100 125
TEMPERATURE, T_J (ƒC)
C035
Figure 25. V_OUT Variation vs. T_J
Copyright © 2013, Texas Instruments Incorporated
9
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