LP38798 Datasheet, PDF (6/23 Pages) Texas Instruments – LP38798-ADJ High PSRR, Ultra Low Noise, 800 mA Linear Voltage Regulator for RF/Analog Circuits

LP38798
SNOSCT6A – MARCH 2013 – REVISED MAY 2013
www.ti.com
TYPICAL PERFORMANCE CHARACTERISTICS
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.
120
110
100
90
80
70
60
50
40
30
20
10
0
10
10 mA
100 mA
200 mA
400 mA
800 mA
100
1k
V_IN = 5.5 V
V_OUT = 5.0 V
C_OUT = 10 µF MLCC
10k
100k
1M
10M
FREQUENCY (Hz)
C007
Figure 2. PSRR, V_IN = 5.5V, V_OUT = 5.0V
120
110
100
90
80
70
60
50
40
30
20
10
0
10
10 mA
100 mA
200 mA
400 mA
800 mA
100
1k
V_IN = 6.0 V
V_OUT = 5.0 V
C_OUT = 10 µF MLCC
10k
100k
1M
10M
FREQUENCY (Hz)
C008
Figure 3. PSRR, V_IN = 6.0 V, V_OUT = 5.0 V
1
1
Cout = 1 µF
Cout = 1 µF
Cout = 10 µF
Cout = 10 µF
0.1
0.1
0.01
V_IN = 3.0 V
V_OUT = 1.2 V
I_OUT = 500 mA
0.001
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
C009
Figure 4. Noise Density, V_OUT = 1.2 V
120
110
100
90
80
70
60 ^VOUT ^{= 5.0 V}
50
40
C_OUT = 10 µF MLCC
I_OUT = 10 mA
30
20
Vin = 5.5V
10
0
10
Vin = 6.0V
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
C001
Figure 6. PSRR, V_OUT = 5.0 V, I_OUT = 10 mA
0.01
V_IN = 6.0 V
V_OUT = 5.0 V
I_OUT = 500 mA
0.001
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
C010
Figure 5. Noise Density, V_OUT = 5.0 V
120
110
100
90
80
70
60 ^VOUT ^{= 5.0 V}
50
C_OUT = 10 µF MLCC
I_OUT = 100 mA
40
30
20
Vin = 5.5V
10
0
10
Vin = 6.0V
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
C002
Figure 7. PSRR, V_OUT = 5.0 V, I_OUT = 100 mA
6
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