Micrel, Inc.
Typical Characteristics (LDO1/LDO2)
MIC2808
LDO2 Dropout Voltage
LDO2 Load Regulation
LDO2 Line Regulation
35
vs. Output Current
2.854
2.860
30
25
20
15
10
2.852
2.850
2.848
2.855
2.850
2.845
36
05
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
5
0
V OUT = 2.85V
91 21 51 82 12 42 73 0
OUTPUT CURRENT (mA)
2.846
V IN = 3.6V
C OUT = 1μF
10 15 20 25 30
OUTPUT CURRENT (mA)
2.840
I OUT = 15mA
C OUT = 1μF
INPUT VOLTAGE (V)
90
Power Supply Rejection
Ratio LDO2 [I OUT =20mA]
100
Power Supply Rejection
Ratio LDO2 [I OUT =1mA]
65
LDO1 Dropout Voltage
vs. Temperature
10 OUT
0.01 0.1 11 0 100
10 C OUT = 1μF
0.01 0.1 11 0 100
-40 -20 0 20 40 60 80 100 120
80
70
60
50
40
30
V IN = 3.6V
20 V OUT = 2.85V
I = 20mA
C OUT = 1μF
0
FREQUENCY (kHz)
LDO1 Ground Current
1000
90
80
70
60
50
40
30 V IN = 3.6V
20 V OUT = 2.85V
I = 1mA
OUT
0
FREQUENCY (kHz)
LDO1 Ground Current
1000
60
55
50
45
V OUT = 2.85V
I OUT = 150mA
TEMPERATURE (°C)
LDO1 Line Regulation
250
vs. Output Current
310
vs. Temperature
2.86
290
240
230
220
270
250
230
210
2.85
2.84
2.83
03
-40 -20 0 20 40 60 80 100 120
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
210
200
V IN = 3.6V
V OUT = 2.85V
06 09 0 120 150
190
150
V IN = 3.6V
170 V OUT = 2.85V
I OUT = 150mA
2.82
2.81
I OUT = 100mA
C OUT = 2.2μF
OUTPUT CURRENT (mA)
Power Supply Rejection
TEMPERATURE (°C)
Power Supply Rejection
INPUT VOLTAGE (V)
LDO1 Dropout Voltage
90
Ratio LDO1 [I OUT =5mA]
100
Ratio LDO1 [I OUT =100mA]
80
vs. Output Current
80
90
70
I OUT = 5mA
C OUT = 2.2μF
0.01 0.1 11 0 100
10 C OUT = 2.2μF
0.1 1 10 100
5
70
60
50
40
30
V IN = 3.6V
20 V OUT = 2.85V
10
0
1000
8 0
70
60
50
40
30
20 V IN = 3.6V
V = 2.85V
OUT
0
1000
60
50
40
30
20
10
0
V OUT = 2.85 V
45 85 125 165 205
July 2009
FREQUENCY (kHz)
FREQUENCY (kHz)
8
OUTPUT CURRENT (mA)
M9999-071709-A
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