600
I
L
= 100mA
SHORT CIRCUIT CURRENT (mA)
500
170
160
500
DROP-OUT VOLTAGE (mV)
DROP-OUT VOLTAGE (mV)
400
150
140
400
300
~
~
300
200
T
J
= 25ºC
130
120
100
50
0
-75 -50 -25
0
25 50 75 100 125 150
TEMPERATURE (ºC)
I
L
= 100
µA
100
0
100µA
1mA
10mA
100mA
OUTPUT CURRENT
110
110
-75 -50 -25
0
25 50 75 100 125 150
TEMPERATURE (ºC)
Drop-Out Voltage
8
V
OUT
= 5V
Drop-Out Voltage
2.5
T
A
= 125ºC
Short Circuit Current
100
mV
50
mV
INPUT OUTPUT VOLTAGE
VOLTAGE CHANGE
6
COMPARATOR OUTPUT (V)
2.0
SINK CURRENT (mA)
4
HYSTERESIS
0
-50
mV
~
~
8V
6V
4V
0
200
400
TIME(µs)
C
L
= 1
µF
I
L
= 1mA
V
OUT
= 5V
1.5
T
A
= 25ºC
2
0
-2
0
1
PULLUP RESISTOR TO
SEPARATE 5V SUPPLY
1.0
T
A
= -55ºC
0.5
0.0
2
3
4
5
INPUT VOLTAGE (V)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
OUTPUT LOW VOLTAGE (V)
600
800
Error Comparator Output
10
I
O
= 100
µA
OUTPUT IMPEDANCE (OHMS)
LP2951 Comparator Sink Current
90
80
RIPPLE REJECTION (dB)
Line Transient Response
90
80
RIPPLE REJECTION (dB)
5
2
1
0.5
0.2
0.1
0.05
0.02
0.01
10
100
1K
10K
100K
1M
FREQUENCY (Hz)
I
O
= 1mA
I
O
= 100mA
70
I
L
= 0
70
60
50
40
30
I
L
= 1mA
C
L
= 1µF
V
IN
= 6V
V
OUT
= 5V
60
50
40
C
L
= 1
µF
V
IN
= 6V
V
OUT
= 5V
V
OUT
= 5V
C
L
= 1
µF
I
L
= 100
µA
30
20
10
1
20
I
L
= 10mA
10
2
10
3
10
4
10
5
10
6
10
1
10
2
10
3
10
4
10
5
10
6
FREQUENCY (Hz)
FREQUENCY (Hz)
Output Impedance
Ripple Rejection
Ripple Rejection
Rev G
LP2950-5 Low Dropout Linear Regulators
© 2008 Exar Corporation
5
EXAR [ EXAR CORPORATION ]
