MIC3975 Datasheet, PDF (5/12 Pages) Micrel Semiconductor – 750mA UCap Low-Voltage Low-Dropout Regulator

MIC3975
Typical Characteristics
Power Supply
Rejection Ratio
80
V_IN = 5V
V_OUT = 3.3V
60
40
20 ^{IOUT = 750mA}
C_OUT = 10µF
C_IN = 0
10E1+01 11E0+02 1E1+k3 11E0+k4 11E00+k5 11EM+6
FREQUENCY (Hz)
Power Supply
Rejection Ratio
80
V_IN = 3.3V
V_OUT = 2.5V
60
40
20 ^{IOUT = 750mA}
C_OUT = 47µF
C_IN = 0
10E10+1 11E0+02 1E1+k3 11E0+k4 11E00+k5 11EM+6
FREQUENCY (Hz)
Dropout Characteristics
(2.5V)
2.8
2.6 _{ILOAD =100mA}
2.4
2.2
2.0
ILOAD =750mA
1.8
1.6
1.4
2
2.3 2.6 2.9 3.2 3.5
SUPPLY VOLTAGE (V)
Ground Current
vs. Supply Voltage (2.5V)
2.0
1.8
1.6
ILOAD ₌100mA
1.4
1.2
1.0
0.8
0.6
ILOAD ₌10mA
0.4
0.2
0
0
2
4
6
8
SUPPLY VOLTAGE (V)
February 2003
Power Supply
Rejection Ratio
80
V_IN = 5V
V_OUT = 3.3V
60
40
20 ^{IOUT = 750mA}
C_OUT = 47µF
C_IN = 0
0
1E1+01 11E0+02 1E1+k3 11E0+k4 11E00+k5 11EM+6
FREQUENCY (Hz)
Dropout Voltage
vs. Output Current
350
300
250
1.8V
200
150
2.5V
3.3V
100
50
T
A
=
25°C
00
250
500
750
OUTPUT CURRENT (mA)
Dropout Characteristics
(3.3V)
3.6
3.4 ^{ILOAD =100mA}
3.2
3.0
ILOAD =750mA
2.8
2.6
2.4
2.8 3.2 3.6 4.0 4.4
SUPPLY VOLTAGE (V)
Ground Current
vs. Supply Voltage (2.5V)
30
25
20
15
10
5
ILOAD = 750mA
0
0
2
4
6
SUPPLY VOLTAGE (V)
5
Micrel
Power Supply
Rejection Ratio
80
V_IN = 3.3V
V_OUT = 2.5V
60
40
20 ^{IOUT = 750mA}
C_OUT = 10µF
C_IN = 0
10E1+01 11E0+02 1E1+k3 11E0+k4 11E00+k5 11EM+6
FREQUENCY (Hz)
Dropout Voltage
vs. Temperature
400
2.5V
350
300 ^1.8V
250
3.3V
I_LOAD = 750mA
20-040 _{-20 0 20 40 60 80 100120140}
TEMPERATURE (°C)
Ground Current
vs. Output Current
10
9
8
7
1.8V
6
2.5V
5
3.3V
4
3
2
1
00
250
500
750
OUTPUT CURRENT (mA)
Ground Current
vs. Supply Voltage (3.3V)
1.4
1.2
1.0
ILOAD =100mA
0.8
0.6
ILOAD =10mA
0.4
0.2
0
0
2
4
6
8
SUPPLY VOLTAGE (V)
MIC3975