MIC38300_13 Datasheet, PDF (5/15 Pages) Micrel Semiconductor – 3A High-Efficiency Low Dropout Regulator

Micrel, Inc.
Typical Characteristics
VIN = 3.3V, VOUT = 1.8V, COUT = 10µF, RLPF = 25kΩ, IOUT = 100mA, unless noted.
MIC38300 PSRR
90
80
70
60
50
40
30
20
10
010
100
1k
10k 100k
FREQUENCY (Hz)
Load Regulation
1.820
1.815
1.810
1.805
1.800
1.795
1.790
1.785
1.780
0
V_IN = 3.3V
V_OUT = 1.8V
C_OUT = 10µF
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
Output Voltage
vs. Temperature
1.88
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.72
V_IN = 3.3V
C_OUT = 10µF
I_OUT = 10mA
20 40 60 80
TEMPERATURE (°C)
Thermal Shutdown
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
V_IN = 3.3V
V_OUT = 1.8V
0.2 _{COUT = 10µF}
-040 10 60
110 160 210
TEMPERATURE (°C)
Dropout Voltage
vs. Load Current
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
V_IN = 3.3V
0.1
C_OUT = 20µF
0
R_LPF
0 0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
Dropout Voltage
vs. Temperature
1.0
0.9
0.8
2A
0.7
1A
0.6
0.5
V_OUT = 4V
C_OUT = 20µF
0.4
20 40 60 80
TEMPERATURE (°C)
MIC38300
Output Voltage
vs. Input Voltage
2.0
1.8
1.6
1.4
10mA
1.2
1.0
2A
0.8
0.6
0.4 _{VOUT = 1.8V}
0.2 C_OUT = 10µF
0012345
INPUT VOLTAGE (V)
MIC38300 Efficiency
90
80
70
60
50
40
30
20
V_IN = 5V
10
V_OUT = 3.3V
C_OUT = 10µF
00 _{0.5 1.0 1.5 2.0 2.5 3.0}
LOAD CURRENT (A)
Current Limit
vs. Input Voltage
5.5
5.3
5.1
4.9
4.7
4.5
4.3
4.1
3.9
V_OUT = 1V
3.7
C_OUT = 20µF
3.5
R_LPF
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLTAGE (V)
April 10, 2013
5
Revision 5.0