Datasheet

TIME (50 Ps/DIV)
I
L =
1 mA
V
EN
(1V/Div)
V
OUT
(500 mV/Div)
TIME (50 Ps/DIV)
I
L =
150 mA
V
EN
(1V/Div)
V
OUT
(500 mV/Div)
100 1k 10k 100k 1M
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
I
L
= 1 mA
C
OUT
= 0.47 PF
C
OUT
= 1 PF
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
100 1k 10k 100k 1M
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
I
LOAD
= 150 mA
C
OUT
= 1 PF
C
OUT
= 0.47 PF
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
TIME (100 Ps/DIV)
800
V
IN =
6V
CURRENT
(mA)
V
OUT
(1V/Div)
600
400
200
0
TIME (100 Ps/DIV)
3.1
2.5
C
IN
= 1 PF
C
OUT
= 0.47 PF
IL = 1 to 150 mA
V
IN
(V)
'V
OUT
(10 mV/Div)
LP3990
SNVS251I –MAY 2004–REVISED MAY 2013 www.ti.com
Typical Performance Characteristics (continued)
Unless otherwise specified, C
IN
= 1.0µF Ceramic, C
OUT
= 0.47 µF Ceramic, V
IN
= V
OUT(NOM)
+ 1.0V, T
A
= 25°C, V
OUT(NOM)
=
1.5V , Shutdown pin is tied to V
IN
.
Short Circuit Current Line transient
Power Supply Rejection Ratio Power Supply Rejection Ratio
Enable Start-up Time Enable Start-up Time
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