Datasheet

TIME (20 ms/DIV)
C
DELAY
= 0.1 PF
C
BYP
= 0
I
LOAD
= 250 mA
V
OUT
2V/DIV
V
IN
2V/DIV
C
DELAY
2V/DIV
ERROR 2V/DIV
TIME (50 Ps/DIV)
C
DELAY
= 0.1 PF
C
BYP
= 0
I
LOAD
= 250 mA
V
OUT
2V/DIV
V
IN
2V/DIV
C
DELAY
2V/DIV
ERROR 2V/DIV
100 1M
FREQUENCY (kHz)
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
RIPPLE REJECTION (
dB)
1k 10k 100k
I
OUT
= 150 mA
C
BYP
= 0.1 PF
I
OUT
= 1 mA
1 10 100
FREQUENCY (kHz)
0.01
0.1
1
10
NOISE
(PV/
Hz)
0.1
C
BYP
= 0
C
BYP
= 0.1 PF
LP3997
SNVS272B –MAY 2004–REVISED MAY 2013 www.ti.com
Typical Performance Characteristics. (continued)
Unless otherwise noted, SD = 950mV, V
IN
= V
OUT
+ 1.0V, C
IN
= 2.2 µF, I
OUT
= 1 mA, C
OUT
= 2.2 µF and C
BYP
= 0.1 µF.
Typical values and limits appearing in normal type apply for T
J
= 27°C. Limits appearing in boldface type apply over the full
temperature range for operation, −40 to +125°C.
Power Supply Rejection Ratio Noise Spectrum
Turn-On Sequence Turn-Off Sequence
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