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LP2951-4.8BM Datasheet(PDF) 7 Page - Micrel Semiconductor

Part # LP2951-4.8BM
Description  100mA Low-Dropout Voltage Regulator
Download  14 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

LP2951-4.8BM Datasheet(HTML) 7 Page - Micrel Semiconductor

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LP2950/2951
Micrel
3
February 1999
3-41
LP2951
Error Comparator Output
LP2951
Minimum Operating Voltage
Line Transient Response
Load Transient Response
Load Transient Response
Ripple Rejection
Output Impedance
2.2
2.0
1.9
1.6
-30
-20
-10
0
10
20
-250
-200
-150
-100
-50
0
50
-2.0 -1.5 -1.0 -0.5
0
0.5
1.0
8
6
4
2
0
-2
01
2
3
4
5
2.5
2.0
1.5
1.0
0.5
0.0
0
50
mV
100
mV
0
200
400
600
800
250
200
150
100
50
0
-50
-100
01
2
3
4
5
80
0
4
8
12
16
20
7
6
5
4
3
2
1
0
-100 0 100 200 300 400 500 600 700
10
5
2
1
0.5
0.2
0.1
0.05
10
100
1K
10K 100K
1M
90
80
70
60
50
40
20
10
10
70
60
50
40
30
20
T = 125
°C
A
C = 1
µF
V
= 5V
L
OUT
I = 10 mA
V = 8V
V
= 5V
L
I = 0
L
I = 100
µA
L
TEMPERATURE (
°C)
FEEDBACK VOLTAGE (V)
TIME (
µs)
OUTPUT LOW VOLTAGE (V)
INPUT VOLTAGE (V)
TIME (ms)
TIME (ms)
FREQUENCY (Hz)
FREQUENCY (Hz)
LP2951
Feedback Bias Current
LP2951
Feedback Pin Current
LP2951
Comparator Sink Current
LP2951
Enable Transient
Ripple Rejection
2.1
1.8
1.7
-75 -50 -25 0 25 50 75 100 125 150
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (
°C)
PIN 7 DRIVEN BY EXTERNAL
SOURCE (REGULATOR RUN
OPEN LOOP)
T = 25
°C
A
V
= 5V
OUT
T = 125
°C
A
T = 25
°C
A
T = -55
°C
A
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
-50
mV
8V
6V
4V
100
mA
100
µA
C = 1
µF
I = 1 mA
V
= 5V
L
OUT
L
60
40
20
0
-20
-40
-60
100
mA
100
µA
C = 10
µF
V
= 5V
L
OUT
2
0
-2
C = 10
µF
L
IN
OUT
0.02
0.01
I = 100
µA
0
I = 1 mA
0
I = 100 mA
0
V
= 5V
C = 1
µF
L
OUT
30
10
10
10
10
13
4
6
C = 1
µF
V = 6V
V
= 5V
L
IN
OUT
C = 1
µF
V = 6V
V
= 5V
L
IN
OUT
I = 10 mA
L
I = 1 mA
L
80
90
HYSTERESIS
PULLUP RESISTOR TO
SEPARATE 5V SUPPLY
2
10
10
FREQUENCY (Hz)
10
10
10
10
123
4
5
6
T = –55
°C
A
TIME (
µs)
L = 1
µF
L


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