LP38798_15 Datasheet, PDF (8/27 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
www.ti.com
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.
120
120
110
110
100
100
90
90
80
80
70
60 ^VOUT ^{= 5.0 V}
50
C_OUT = 10 µF MLCC
I_OUT = 200 mA
40
70
60 V_OUT = 5.0 V
50 ^{COUT = 10 µF MLCC}
40
I_OUT = 400 mA
30
20
Vin = 5.5V
30
20
Vin = 5.5V
10
0
10
Vin = 6.0V
100
1k
10k
100k
1M
10M
10
0
10
Vin = 6.0V
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
C003
FREQUENCY (Hz)
C004
Figure 7. PSRR
120
110
100
90
80
70
60 _{VOUT = 5.0 V}
50 ^COUT ^{= 10 µF MLCC}
40
I_OUT = 800 mA
30
20
Vin = 5.5V
10
0
10
Vin = 6.0V
100
1k
10k
100k
1M
FREQUENCY (Hz)
10M
C005
Figure 8. PSRR
120
110
100
90
80
70
60 VIN = 5.5 V
50 ^{VOUT = 5.0 V}
40
I_OUT = 800 mA
30
20
Cout = 10 µF
10
0
10
Cout = 50 µF
100
1k
10k
100k
1M
FREQUENCY (Hz)
10M
C006
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
-50 -25
Figure 9. PSRR
Rising V_IN (ON)
Falling V_IN (OFF)
0
25
50
75
TEMPERATURE, T_J (SC)
100
125
C023
Figure 11. UVLO Thresholds vs. T_J
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
-50 -25
Figure 10. PSRR
Rising V_EN (ON)
Falling V_EN (OFF)
0
25
50
75
TEMPERATURE, T_J (SC)
100
125
C024
Figure 12. Enable Thresholds vs. T_J
8
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