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