MIC2225_08 Datasheet, PDF (7/15 Pages) Micrel Semiconductor – 2MHz 600mA Synchronous Buck Regulator with 300mA LDO

Micrel, Inc.
Typical Characteristics (LDO)
PSRR
70
60
100mA
50
40 300mA
30
10mA
20
V_IN = 1.7V
10 VOUT = 2.8V
C_OUT = 2.2µF
1000
1K
10K
FREQUENCY (Hz)
100K
Quiescent Current
vs. Temperature
125
100
100mA
75
50mA
50
1mA
25
0
-40 -20 0
V_IN = 3.6V
ENLDO = V_IN
20 40 60 80 100 120
TEMPERATURE (°C)
Output Voltage
vs. Temperature
2.86
2.84
2.82
2.8
2.78
2.76
2.74
2.72
2.70
2.68
2.66
-40 -20 0
V_IN = 3.6V
ENLDO = V_IN
Load = 10mA
20 40 60 80 100 120
TEMPERATURE (°C)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
20.5
Peak Current Limit
vs. Input Voltage
EN = ENLDO = V_IN
3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
February 2008
Quiescent Current
vs. Input Voltage
90
80
70
60mA
60
50
100mA
40
30 ^0mA
20
10
ENLDO = V_IN
00 _{1 2 3 4 5}
INPUT VOLTAGE (V)
Output Voltage
vs. Load Current
3.00
2.95
2.90
2.85
2.80
2.75
2.70
2.65
2.60
2.55
V_IN = 3.6V
ENLDO = V_IN
2.50
0.025 0.075 0.125 0.175 0.225 0.275
LOAD CURRENT (A)
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
00
Dropout Voltage
vs. Load Current
V_IN = 3.6V
ENLDO = V_IN
0.05 0.1 0.15 0.2 0.25 0.3
LOAD CURRENT (A)
Turn-On Time
vs. Input Voltage
50
45
40
35
30
25
20
15
10
5
ENLDO = V_IN
20.5 3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
7
MIC2225
Quiescent Current
vs. Load Current
80
78
76
74
72
70
68
66
64
62
V_IN = 3.6V
ENLDO = V_IN
60
0.025 0.075 0.125 0.175 0.225 0.275
LOAD CURRENT (A)
Output Voltage
vs. Temperature
3.00
2.95
2.90
2.85
2.80
2.75
2.70
2.65
2.60
2.55
V_IN = 3.6V
ENLDO = V_IN
Load = 1mA
2.50
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Dropout Voltage
vs. Temperature
50
ENLDO = V_IN
40
50mA
30
20
25mA
10
10mA
1mA
-040 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Enable Threshold
vs. Input Voltage
1.4
1.2
1.0
0.8
0.6
0.4
0.2
20.5
LDO = 2.8V
3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
M9999-022008-D