600
500
400
300
170
160
150
140
130
120
110
IL= 100mA
500
400
300
100
~
~
200
TJ = 25ºC
100
0
50
0
IL= 100 µA
110
100µA
1mA
OUTPUT CURRENT
10mA
100mA
-75 -50 -25
0
25 50 75 100 125 150
-75 -50 -25
0
25 50 75 100 125 150
TEMPERATURE (ºC)
TEMPERATURE (ºC)
Drop-Out Voltage
Drop-Out Voltage
Short Circuit Current
8
6
4
2.5
2.0
100
mV
VOUT = 5V
TA = 125ºC
50
mV
0
1.5
1.0
TA = 25ºC
TA = -55ºC
CL= 1 µF
IL= 1mA
HYSTERESIS
-50
mV
~
VOUT = 5V
2
0
~
8V
0.5
0.0
6V
4V
PULLUP RESISTOR TO
SEPARATE 5V SUPPLY
-2
0
1
2
3
4
5
0
200
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
400
600
800
INPUT VOLTAGE (V)
OUTPUT LOW VOLTAGE (V)
TIME(µs)
Error Comparator Output
LP2951 Comparator Sink Current
Line Transient Response
10
90
80
90
80
IO= 100 µA
5
CL= 1µF
VIN = 6V
VOUT = 5V
IO= 1mA
2
70
70
60
50
40
30
20
IL = 1mA
IL= 0
IO= 100mA
1
60
50
40
0.5
0.2
VOUT = 5V
CL= 1 µF
0.1
0.05
IL= 100 µA
CL= 1 µF
VIN = 6V
VOUT = 5V
30
20
0.02
0.01
IL = 10mA
103
10 2
10 5
106
10 1
10 2
10 3
10 4
10 5
10 6
10
100
1K
FREQUENCY (Hz)
10K
100K
1M
10 1
10 4
FREQUENCY (Hz)
FREQUENCY (Hz)
Output Impedance
Ripple Rejection
Ripple Rejection
© 2008 Exar Corporation
Rev G
LP2950-5ꢀ Low Dropout Linear Regulators
5
EXAR [ EXAR CORPORATION ]
