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LP2951 Datasheet(PDF) 6 Page - Calogic, LLC

No. de pieza LP2951
Descripción Electrónicos  100mA Low Dropout Voltage Regulators
PDF  10 Pages
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Fabricante Electrónico  CALOGIC [Calogic, LLC]
Página de inicio  http://www.calogic.net
Logo CALOGIC - Calogic, LLC

LP2951 Datasheet(HTML) 6 Page - Calogic, LLC

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LP2950 / LP2951
CORPORATION
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
TEMPERATURE (˚C)
2.2
1.6
–75
150
1D-34
LP2951 MINIMUM
OPERATING VOLTAGE
–50 –25 0
25 50 75 100 125
2.0
1.8
1.7
2.1
1.9
FEEDBACK VOLTAGE (V)
50
–250
–2.0
1.0
1D-36
LP2951 FEEDBACK
PIN CURRENT
–100
–150
–200
–1.5
–1.0
0.5
0
–0.5
–50
0
TA = 125˚C
TA = –55˚C
PIN 7 DRIVEN BY
EXTERNAL SOURCE
(REGULATROR RUN
OPEN LOOP)
TA = 25˚C
TEMPERATURE (˚C)
20
–30
–75
150
1D-35
LP2951 FEEDBACK
BIAS CURRENT
–50 –25 0
25 50 75 100 125
10
0
–10
–20
INPUT VOLTAGE (V)
8
–2
5
1D-37
LP2951 ERROR
COMPARATOR OUTPUT
6
4
2
0
4
3
2
1
0
VOUT = 5V
NOTE: PULLUP RESISTOR
TO SEPARATE 5V SUPPLY
HYSTERESIS
TIME (
µs)
100mV
4V
800
1D-39
LINE TRANSIENT
RESPONSE
0
200
400
600
0
8V
6V
50mV
–50mV
IL = 1mA
VOUT = 5V
CL = 1µA
OUTPUT LOW VOLTAGE (V)
2.5
0.0
0.0
0.9
1D-38
LP2951 COMPARATOR
SINK CURRENT
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
2.0
1.5
1.0
0.5
TA = 125˚C
TA = 25˚C
TA = –55˚C
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
FREQUENCY (Hz)
10
0.01
10
1M
OUTPUT IMPEDANCE
100
1K
100K
10K
0.1
1
0.02
0.05
0.2
0.5
2
5
1D-40
IO = 100µA
IO = 1mA
IO = 100mA
VOUT = 5V
CL = 1µA
FREQUENCY (Hz)
90
20
1D-42
RIPPLE REJECTION
80
70
60
50
40
30
106
105
104
103
102
101
IL = 1mA
IL = 10mA
VOUT
CL = 1µF
VIN = 6V
= 5V
FREQUENCY (Hz)
90
20
1D-41
RIPPLE REJECTION
80
70
60
50
40
30
106
105
104
103
102
101
IL = 0
IL = 100µA
VOUT = 5V
VIN = 6V
CL = 1µF
TIME (ms)
250
100
µA
5
1D-43
LOAD TRANISENT
RESPONSE
50
100mA
150
4
3
2
1
0
200
100
0
–50
–100
CL = 1µF
VOUT = 5V
TIME (
µs)
1D-45
LP2951
ENABLE TRANSIENT
–100
700
0
100 200 300 400 500 600
7
–2
0
2
0
1
2
3
4
5
6
CL = 1µF
IL = 10mA
VIN = 8V
VOUT = 5V
CL = 10µF
TIME (ms)
80
100
µA
20
1D-44
LOAD TRANSIENT
RESPONSE
0
100mA
40
16
12
8
4
0
60
20
–20
–40
–60
OUT
CL = 10µF
V
= 5V



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