MIC3775
Micrel
Typical Characteristics
Power Supply
Rejection Ratio
80
70
60
PSRR (dB)
Power Supply
Rejection Ratio
80
80
VIN =5V
VOUT =3.3V
PSRR (dB)
Power Supply
Rejection Ratio
70
60
50
40
30 I
OUT=750mA
20 COUT =10µF
10 CIN =0
0
0.01
0.1
1
10
100
FREQUENCY (KHz)
1000
VIN =3.3V
VOUT =2.5V
VIN = 5V
VOUT = 3.3V
PSRR (dB)
70
60
50
40
30 I
OUT=750mA
20 COUT =47µF
10 CIN =0
0
0.01
50
40
30 I
OUT=750mA
20 COUT =10µF
10 CIN =0
0
0.01
0.1
1
10
100
FREQUENCY (KHz)
1000
0.1
1
10
100
FREQUENCY (KHz)
1000
Power Supply
Rejection Ratio
80
70
60
PSRR (dB)
Dropout
vs. Output Current
300
250
1.8V
OUT
DROPOUT (mV)
Dropout
vs. Temperature
400
350
300
250
200
150
100
50
2.5VOUT
VIN =3.3V
VOUT =2.5V
DROPOUT (mV)
50
40
30 I
OUT=750mA
20 COUT =47µF
10 CIN =0
0
0.01
0.1
1
10
100
FREQUENCY (KHz)
1000
200
150
100
50
0
0
0.25
0.5
0.75
OUTPUT CURRENT (A)
2.5V
OUT
3.3V
OUT
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Dropout Characteristics
(1.5V)
1.6
2.0
Dropout Characteristics
(1.8V)
3.0
OUTPUT VOLTAGE (V)
Dropout Characteristics
(2.5V)
2.5
2.0
1.5
1.0
0.5
0
1.5
2
2.5
3
INPUT VOLTAGE (V)
3.5
750mA Load
10mA Load
OUTPUT VOLTAGE (V)
1.2
1.0
0.8
0.6
0.4
0.2
0
1.5
1.7
1.9
2.1
2.3
INPUT VOLTAGE (V)
2.5
750mA Load
10mA Load
OUTPUT VOLTAGE (V)
1.4
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1.5
750mA Load
10mA Load
2
2.5
INPUT VOLTAGE (V)
3
Dropout Characteristics
(3.3V)
4.0
Ground Current
vs. Output Current
7
0.8
Ground Current
vs. Supply Voltage (1.5V)
GROUND CURRENT (mA)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
10mA
1
2
3
4
5
INPUT VOLTAGE (V)
6
100mA
OUTPUT VOLTAGE (V)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1.5
2
2.5
3
3.5
4
INPUT VOLTAGE (V)
4.5
750mA Load
10mA Load
GROUND CURRENT (mA)
6
5
4
3
2
1
0
0
2.5VOUT
3.3VOUT
0.25
0.5
0.75
OUTPUT CURRENT (A)
March 2003
5
MIC3775
MICREL [ MICREL SEMICONDUCTOR ]
