LP38798_15 Datasheet, PDF (7/27 Pages) Texas Instruments – LP38798 High PSRR, Ultra-Low-Noise, 800-mA Linear Voltage Regulator for RF/Analog Circuits

www.ti.com
LP38798
SNOSCT6B – MARCH 2013 – REVISED DECEMBER 2014
6.6 Typical Characteristics
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.
120
110
100
90
80
70
60
50
40
30
20
10
0
10
10 mA
100 mA
200 mA
400 mA
800 mA
V_IN = 5.5 V
V_OUT = 5.0 V
C_OUT = 10 µF MLCC
100
1k
10k
100k
1M
FREQUENCY (Hz)
10M
C007
120
110
100
90
80
70
60
50
40
30
20
10
0
10
10 mA
100 mA
200 mA
400 mA
800 mA
V_IN = 6.0 V
V_OUT = 5.0 V
C_OUT = 10 µF MLCC
100
1k
10k
100k
1M
FREQUENCY (Hz)
10M
C008
Figure 1. PSRR
Figure 2. PSRR
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
FREQUENCY (Hz)
10M
C009
0.01
V_IN = 6.0 V
V_OUT = 5.0 V
I_OUT = 500 mA
0.001
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
10M
C010
Figure 3. Noise Density
120
110
100
90
80
70
60 ^VOUT ^{= 5.0 V}
50 ^{COUT = 10 µF MLCC}
40
I_OUT = 10 mA
30
20
Vin = 5.5V
10
0
10
Vin = 6.0V
100
1k
10k
100k
1M
FREQUENCY (Hz)
10M
C001
Figure 4. Noise Density
120
110
100
90
80
70
60 ^VOUT ^{= 5.0 V}
50
C_OUT = 10 µF MLCC
I_OUT = 100 mA
40
30
20
10
0
10
Vin = 5.5V
Vin = 6.0V
100
1k
10k
100k
1M
FREQUENCY (Hz)
10M
C002
Figure 5. PSRR
Figure 6. PSRR
Copyright © 2013–2014, Texas Instruments Incorporated
Product Folder Links: LP38798
Submit Documentation Feedback
7