LP2950AS Просмотр технического описания (PDF) - Signal Processing Technologies
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LP2950AS Datasheet PDF : 12 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
ERROR COMPARATOR OUTPUT
8
VOUT = 5V
6
4
HYSTERESIS
2
0
PULLUP RESISTOR TO
-2
SEPARATE 5V SUPPLY
0
1
2
3
4
5
INPUT VOLTAGE (V)
LP2951
COMPARATOR SINK CURRENT
2.5
TA = 125ºC
2.0
1.5
TA = 25ºC
1.0
TA = -55ºC
0.5
0.0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
OUTPUT LOW VOLTAGE (V)
OUTPUT IMPEDANCE
10
IO = 100µA
5
2
IO = 1mA
1
0.5
0.2
0.1
0.05
IO = 100mA
VOUT = 5V
CL = 1µF
0.02
0.01
10
100 1K 10K 100K 1M
FREQUENCY (Hz)
LP2951
MINIMUM OPERATING VOLTAGE
10
RIPPLE REJECTION
90
80
70
IL = 0
60
50
40
CL = 1µF
30
VIN = 6V
VOUT = 5V
20
IL = 100µA
101
102 103 104
105 106
FREQUENCY (Hz)
LP2951
FEEDBACK BIAS CURRENT
20
10
1
0
-10
0.1
-20
0.01
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE
250
200
150
100
50
0
-50
-100
~~
100
mA
100
µA
LOAD TRANSIENT RESPONSE
CL = 1µF
VOUT = 5V
0
1
2
3
45
TIME (ms)
-30
-75 -50 -25 0 25 50 75 100 125 150
TEMPEATURE (ºC)
80
60
40
20
0
-20
-40
-60
~~
1µ0A0
100
µA
LOAD TRANSIENT RESPONSE
CL = 1µF
VOUT = 5V
0
4
8 12 16 20
TIME (ms)
LP2950/LP2951
100
mV
m50V
0
-50
mV ~~
8V
LINE TRANSIENT RESPONSE
CL = 1µF
IL = 1mA
VOUT = 5V
6V
4V
0
200 400 600 800
TIME(µs)
RIPPLE REJECTION
90
80
70
IL = 10mA
60
CL= 1µF
VIN = 6V
VOUT = 5V
50
40
30
20
101
IL = 10mA
102 103 104
105
106
FREQUENCY (Hz)
LP2951
FEEDBACK PIN CURRENT
50
PIN 7 DRIVEN BY EXTERNAL
SOURCE (REGULATOR RUN
0
OPEN LOOP)
-50
-100
TA =1 25ºC
-150
-200
TA = 25ºC
-250
TA = 55ºC
-2.0 -1.5 -1.0 -0.5 0
0.5 1.0
FEEDBACK VOLTAGE (V)
ENABLE TRANSIENT
7
6
5
4
3
2
IL = 10mA
1
VIN = 8V
0
CL = 10µF V OUT = 5V
2
0
-2
-100 0 100 200 300 400 500 600 700
TIME
Rev. 11/2/00
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