Datasheet

0
10
20
30
40
50
60
70
80
90
100
10 100 1k 10k 100k 1M
Frequency − Hz
Ripple Rejection − dB
50 mA
150 mA
1 mA
V
I
= 3.7 V
V
O
= 3.3 V
C
o
= 10 µF
C
byp
= 0 nF
0
10
20
30
40
50
60
70
80
90
100
10 100 1k 10k 100k 1M
Frequency − Hz
Ripple Rejection − dB
V
I
= 5 V
V
O
= 3.3 V
C
o
= 4.7 µF
C
byp
= 10 nF
50 mA
150 mA
1 mA
0
10
20
30
40
50
60
70
80
90
100
10 100 1k 10k 100k 1M
Frequency − Hz
Ripple Rejection − dB
V
I
= 5 V
V
O
= 3.3 V
C
o
= 4.7 µF
C
byp
= 10 nF
10 mA
100 mA
1 mA
0.001
0.01
0.1
1
10
10 100 1k 10k 100k 1M
Frequency − Hz
C
i
= 1 µF
C
o
= 10 µF
V
O
= 3.3 V
10 mA
100 mA
1 mA
Output Impedance − Ω
LP2985
www.ti.com SLVS522N –JULY 2004– REVISED JUNE 2011
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
C
IN
= 1 μF, C
OUT
= 4.7 μF, V
IN
= V
OUT(NOM)
+ 1 V, T
A
= 25°C, ON/OFF pin tied to V
IN
(unless otherwise specified)
RIPPLE REJECTION RIPPLE REJECTION
vs vs
FREQUENCY FREQUENCY
Figure 10. Figure 11.
RIPPLE REJECTION OUTPUT IMPEDANCE
vs vs
FREQUENCY FREQUENCY
Figure 12. Figure 13.
Copyright © 2004–2011, Texas Instruments Incorporated 9