20
50
0
2.3
PIN 7 DRIVEN BY EXTERNAL
SOURCE (REGULATOR RUN
OPEN LOOP)
10
-50
2.1
0
TA=1 25ºC
-100
-150
-200
-250
-10
TA= 25ºC
TA= 55ºC
1.9
-20
-30
1.7
-75 -50 -25
-75 -50 -25
0
25 50 75 100 125 150
-2.0
-1.5 -1.0 -0.5
0
0.5
1.0
0
25 50 75 100 125 150
TEMPEATURE (ºC)
FEEDBACK VOLTAGE (V)
TEMPERATURE
LP2951 Minimum Operating Voltage
LP2951 Feedback Bias Current
LP2951 Feedback Pin Current
250
200
150
80
60
40
7
CL= 1 µF
6
5
4
100
50
0
20
0
3
-20
2
1
0
IL = 10mA
VIN= 8V
CL = 10 µF
VOUT = 5V
-50
-40
CL= 1 µF
VOUT = 5V
-100
-60
CL= 10 µF
V OUT = 5V
~
~
~
~
100
mA
2
0
100
µA
100
100
µA
µA
-2
0
1
2
3
4
5
-100
0
100 200 300 400 500 600 700
0
4
8
12
16
20
TIME (ms)
TIME (us)
TIME (ms)
Load Transient Response
Load Transient Response
Enable Transient
120
400
300
200
120
8-PIN
TO-92 PACKAGE
MOLDED
0.25" LEADS SOLDERED
TO PC BOARD
DIP SOLDERED
TO PC BOARD
TJMAX = 125º C
100
80
100
80
VOUT = 5V
Vout=5V
TJMAX = 125 ºC
60
60
TA = 25ºC
40
TA=25 ºC
40
20
0
TA = 50ºC
100
0
TA= 85 ºC
20
0
TA = 85ºC
0
5
10
15
20
25
30
-75 -50 -25
0
25 50 75 100 125 150
0
5
10
15
20
25
30
INPUT VOLTAGE (V)
TEMPERATURE (ºC)
INPUT VOLTAGE (V)
LP2950 Maxium Rated Output
LP2951 Divider Resistance
LP2950 Maxium Rated Output Current
Rev G
LP2950-5ꢀ Low Dropout Linear Regulators
© 2008 Exar Corporation
6
EXAR [ EXAR CORPORATION ]
