LP38691-ADJ_14 Datasheet, PDF (6/22 Pages) Texas Instruments – 500mA Low Dropout CMOS Linear Regulators with Adjustable Output Stable with Ceramic Output Capacitors

LP38691-ADJ, LP38693-ADJ
SNVS324I – JANUARY 2005 – REVISED APRIL 2013
www.ti.com
Typical Performance Characteristics
Unless otherwise specified: T_J = 25°C, C_IN = C_OUT = 10 µF, enable pin is tied to V_IN (LP38693-ADJ only), V_O = 1.25V, V_IN =
2.7V, I_L = 10mA.
Noise vs Frequency
1.2
C_OUT = 1 PF
1.0
Noise vs Frequency
1.0
C_OUT = 10 PF
0.8
0.8
0.6
0.6
0.4
0.4
0.2
0.2
0.0
10
100
1k
10k
100k
FREQUENCY (Hz)
Figure 6.
0.0
10
100
1k
10k
FREQUENCY (Hz)
Figure 7.
100k
Noise vs Frequency
1.5
C_OUT = 100 PF
1.0
0.5
0.0
10
100
1k
10k
100k
FREQUENCY (Hz)
Figure 8.
Ripple Rejection
70
60
50
40
30
V_IN (DC) = 3.25V
20 _{VIN (AC) = 1V(p-p)}
C_OUT = 10 PF
10
0
10
100
1k
10k
FREQUENCY (Hz)
Figure 9.
100k
Ripple Rejection
70
60
50
40
30
20 VIN (DC) = 3.25V
V_IN (AC) = 1V(p-p)
10 _{COUT = 100 PF}
0
10
100
1k
10k
FREQUENCY (Hz)
Figure 10.
100k
Ripple Rejection
70
60
50
40
30
20
V_IN (DC) = 3.25V
V_IN (AC) = 1V(p-p)
10 ^COUT ^{= 1 PF}
0
10
100
1k
10k
FREQUENCY (Hz)
Figure 11.
100k
6
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