LP2950/LP2951
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
Load Transient Response
250
200
150
100
50
0
-50
-100
80
60
40
20
0
-20
-40
-60
OUTPUT VOLTAGE
CHANGE (mV)
OUTPUT VOLTAGE
CHANGE (mV)
Load Transient Response
OUTPUT
VOLTAGE (V)
7
6
5
4
3
2
1
0
2
LP2951 Enable Transient
C
L
= 1
µF
C
L
= 10
µF
V
OUT
= 5V
C
L
= 10
µF
I
L
= 10 mA
V
IN
= 8V
V
OUT
= 5V
LOAD
CURRENT
LOAD
CURRENT
~
~
100
mA
100
µA
0
1
2
3
TIME (ms)
~
~
100
mA
100
µA
0
4
8
12
TIME (ms)
16
20
SHUTDOWN PIN
VOLTAGE (V)
RIPPLE REJECTION (dB)
C
L
= 1
µF
V
OUT
= 5V
~
~
4
5
0
-2
-100 0 100 200 300 400 500 600 700
TIME (µs)
Output Impedance
10
5
OUPUT IMPEDANCE (Ω)
2
1
0.5
0.2
0.1
0.05
0.02
0.01
10
100
1K
10K 100K
FREQUENCY (Hz)
1M
V
OUT
= 5V
C
L
= 1
µF
I
O
= 100mA
I
O
= 1 mA
Ripple Rejection
90
90
80
70
60
50
40
30
Ripple Rejection
I
O
= 100µA
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
1
C
L
= 1
µF
V
IN
= 6V
V
OUT
= 5V
I
L
= 100µA
I
L
= 0
I
L
= 1mA
C
L
= 1
µF
V
IN
= 6V
V
OUT
= 5V
I
L
= 10mA
10
2
10
5
10
3
10
4
FREQUENCY (Hz)
10
6
20
10
1
10
2
10
5
10
3
10
4
FREQUENCY (Hz)
10
6
Ripple Rejection
80
RIPPLE REJECTION (dB)
70
60
50
40
30
20
10
10
1
10
2
10
5
10
3
10
4
FREQUENCY (Hz)
10
6
C
L
= 1µF
V
IN
= 6V
V
OUT
= 5V
LP2951 Output Noise
3.5
VOLTAGE NOISE SPECTRAL
DENSITY(mV/√Hz)
400
5V OUTPUT
I
L
= 100mA
LP2951 Divider Resistance
PIN 2 TO PIN 4 RESISTANCE (k
Ω)
10
5
I
L
= 50mA
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.01
µF
BYPASS
PIN 1 TO
PIN 7
C
L
= 3.3
µF
C
L
= 220
µF
C
L
= 1
µF
I
L
= 100mA
300
200
100
10
2
10
3
10
4
FREQUENCY (Hz)
0
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (° C)
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
ADMOS [ ADVANCED MONOLITHIC SYSTEMS ]
