LP38842_15 Datasheet, PDF (6/17 Pages) Texas Instruments – Ultra Low Dropout Linear Regulators Stable with Ceramic Output Capacitors

LP38842
SNVS291C – DECEMBER 2004 – REVISED APRIL 2013
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Unless otherwise specified: T_J = 25°C, C_IN = 10 µF CER, C_OUT = 22 µF CER, C_BIAS = 1 µF CER, S/D Pin is tied to V_BIAS, V_OUT
= 1.2V, I_L = 10mA, V_BIAS = 5V, V_IN = V_OUT + 1V.
V_BIAS PSRR
100
V_IN PSRR
80
90
C_BIAS = 1 PF Tantalum
I_L = 0
80
V_OUT = 1.2V
70
C_OUT = 4.7 PF Tantalum
70
C_BIAS = 1 PF Tantalum
60
I_L = 10 mA
60
50
50
40
40
30
30
20
20
10
10
0
100
1000 10000 100000 1000000
0
1000
10000
100000
1000000
FREQUENCY (Hz)
Figure 9.
FREQUENCY (Hz)
Figure 10.
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1
Output Noise Voltage
V_OUT = 1.2V
I_L = 1A
C_OUT = 100 PF Tant.
100
10k
1M
FREQUENCY (MHz)
Figure 11.
6
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