LP2950 Datasheet, PDF (6/13 Pages) National Semiconductor (TI) – Series of Adjustable Micropower Voltage Regulators

LP2950/LP2951
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
2.3
2.1
1.9
1.7
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE
LP2951 Minimum Operating Voltage
20
50
PIN 7 DRIVEN BY EXTERNAL
SOURCE (REGULATOR RUN
10
0
OPEN LOOP)
-50
0
-100 ^{TA=1 25ºC}
-10
-150
T_A = 25ºC
-20
-200
T_A = 55ºC
-30
-75 -50 -25 0 25 50 75 100 125 150
TEMPEATURE (ºC)
LP2951 Feedback Bias Current
-250
-2.0 -1.5 -1.0 -0.5 0 0.5 1.0
FEEDBACK VOLTAGE (V)
LP2951 Feedback Pin Current
250
200
150
100
50
0
-50
-100
~~
100
mA
100
µA
0
C_L = 1µF
V _OUT = 5V
1
23
TIME (ms)
45
Load Transient Response
80
60
40
20
0
-20
-40
-60
~~
100
µA
100
µA
0
C_L = 10µF
V_OUT = 5V
4
8 12 16 20
TIME (ms)
7
6
C_L = 1µF
5
4
3
2
I_L = 10mA
1
V _IN = 8V
0
C_L = 10µF
V _OUT = 5V
2
0
-2
-100 0 100 200 300 400 500 600 700
TIME (us)
Load Transient Response
Enable Transient
120
TO-92 PACKAGE
100
0.25" LEADS SOLDERED
TO PC BOARD
80
Vout=5V
60
T_JMAX = 125 ºC
40
20
T_A = 85 ºC
T_A=25 ºC
0
0 5 10 15 20 25 30
INPUT VOLTAGE (V)
LP2950 Maxium Rated Output
400
120
8-PIN
MOLDED
100
DIP SOLDERED
300
TO PC BOARD
80
T_JMAX = 125º C
V _OUT = 5V
200
60
T_A = 25ºC
40
T_A = 50ºC
100
20
T_A = 85ºC
0
0
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (ºC)
LP2951 Divider Resistance
0
5 10 15 20 25 30
INPUT VOLTAGE (V)
LP2950 Maxium Rated Output Current
Rev. 8/10/01
LP2950/51 100mA Low Dropout Voltage Regulators
6
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