MIC2205 Datasheet, PDF (7/16 Pages) Micrel Semiconductor – 2MHz PWM Synchronous Buck Regulator with LDO Standby Mode

Micrel, Inc.
Typical Characteristics - LDO Mode
PSRR
vs. Input Voltage
80
60
PSRR
vs. Output Current
80
I_OUT = 0A
60
I_OUT = 100 A
40
4.2V
3V
20 I_OUT = 50mA
V_OUT = 1.8V _3.6V
0 ^{COUT = 2.2 F}
10E.0-21 10E.1-1 1E1+0 11E0+1 11E00+2 11Ek+3
FREQUENCY (Hz)
40
20 V_IN = 3.6
V_OUT = 1.8V
0 ^{COUT = 2.2 F IOUT = 50mA}
10E.0-21 10E.1-1 1E1+0 11E0+1 11E00+2 11Ek+3
FREQUENCY (Hz)
Current Limit
vs. Supply Voltage
140
120
100
80
60
40
20
02.7
LowQ = 0V
3.4 4.1 4.8 5.5
SUPPLY VOLTAGE (V)
Dropout Voltage
vs. Temperature
160
140
120
100
80
60
40
V_OUT = 3.3V
20
I_OUT = 50mA
LowQ = 0V
0-40 _{-20 0 20 40 60 80 100 120}
TEMPERATURE (°C)
Dropout Voltage
vs. Temperature
40
35
30
25
20
15
10
V_OUT = 3.3V
5
I_OUT = 10mA
LowQ = 0V
0-40 _{-20 0 20 40 60 80 100 120}
TEMPERATURE (°C)
Dropout Voltage
vs. Temperature
9
8
7
6
5
4
3
2
V_OUT = 3.3V
1
I_OUT = 1mA
LowQ = 0V
0-40 _{-20 0 20 40 60 80 100 120}
TEMPERATURE (°C)
Enable Threshold Voltage
vs. Supply Voltage
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
LowQ = 0V
0.5
2.7 3.4 4.1 4.8 5.5
SUPPLY VOLTAGE (V)
Turn-On Time
vs. Supply Voltage
100
90
80
70
60
50
40
30
20
10
V_IN = 3.6V
LowQ = 0V
0
2.7 3.4 4.1 4.8 5.5
SUPPLY VOLTAGE (V)
April 2005
7
MIC2205
Dropout
vs. Output Current
250
200
150
100
50
V_OUT = 3.3V
00
20 40 60 80 100
OUTPUT CURRENT (mA)
Dropout Voltage
vs. Temperature
80
70
60
50
40
30
20
V_OUT = 3.3V
10
I_OUT = 25mA
LowQ = 0V
0-40 _{-20 0 20 40 60 80 100 120}
TEMPERATURE (°C)
1.836
Output Voltage
vs. Temperature
1.827
1.818
1.809
1.800
1.791
1.782
1.773
LowQ = 0V
1.764-40 _{-20 0 20 40 60 80 100 120}
TEMPERATURE (°C)
Quiescent Current
vs. Temperature
25
I_OUT = 50mA
20
I_OUT = 1mA
15 I_OUT = 100 A
10
5
0
-40 -20 0
V_IN = 3.6V
LowQ = 0V
20 40 60 80 100 120
TEMPERATURE (°C)
M9999-041105
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