MIC3975
Micrel
Typical Characteristics
Power Supply
Rejection Ratio
80
V
IN
= 5V
V
OUT
= 3.3V
PSRR (dB)
Power Supply
Rejection Ratio
80
V
IN
= 5V
V
OUT
= 3.3V
PSRR (dB)
Power Supply
Rejection Ratio
80
V
IN
= 3.3V
V
OUT
= 2.5V
60
PSRR (dB)
60
60
40
I
OUT
= 750mA
C
OUT
= 10µF
C
IN
= 0
40
I
OUT
= 750mA
C
OUT
= 47µF
C
IN
= 0
40
I
OUT
= 750mA
C
OUT
= 10µF
C
IN
= 0
20
20
20
0
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6
1k
10k 100k 1M
10
100
FREQUENCY (Hz)
0
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6
1k
10k 100k 1M
10
100
FREQUENCY (Hz)
0
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6
1k
10k 100k 1M
10
100
FREQUENCY (Hz)
Power Supply
Rejection Ratio
80
DROPOUT VOLTAGE (V)
Dropout Voltage
vs. Output Current
350
2.5V
1.8V
3.3V
DROPOUT VOLTAGE (V)
Dropout Voltage
vs. Temperature
400
2.5V
350
1.8V
V
IN
= 3.3V
V
OUT
= 2.5V
300
250
200
150
100
50
0
0
60
PSRR (dB)
40
I
OUT
= 750mA
C
OUT
= 47µF
C
IN
= 0
300
20
250
3.3V
I
LOAD
= 750mA
200
-40 -20 0 20 40 60 80 100120140
TEMPERATURE (°C)
0
1E+1 1E+2 1E+3 1E+4 1E+5 1E+6
1k
10k 100k 1M
10
100
FREQUENCY (Hz)
T
A
= 25°C
250
500
750
OUTPUT CURRENT (mA)
2.8
Dropout Characteristics
(2.5V)
OUTPUT VOLTAGE (V)
ILOAD =100mA
3.6
3.4
3.2
3.0
Dropout Characteristics
(3.3V)
ILOAD =100mA
GROUND CURRENT (mA)
10
9
8
7
6
5
4
3
2
1
0
0
Ground Current
vs. Output Current
OUTPUT VOLTAGE (V)
2.6
2.4
2.2
2.0
1.8
1.6
1.4
2
1.8V
2.5V
3.3V
ILOAD =750mA
ILOAD =750mA
2.8
2.6
2.4
2.8
3.2
3.6
4.0
SUPPLY VOLTAGE (V)
4.4
2.3
2.6
2.9
3.2
SUPPLY VOLTAGE (V)
3.5
250
500
750
OUTPUT CURRENT (mA)
Ground Current
vs. Supply Voltage (2.5V)
GROUND CURRENT (mA)
GROUND CURRENT (mA)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
2
4
6
SUPPLY VOLTAGE (V)
8
ILOAD
=
10mA
ILOAD
=
100mA
Ground Current
vs. Supply Voltage (2.5V)
30
GROUND CURRENT (mA)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
Ground Current
vs. Supply Voltage (3.3V)
25
20
15
10
5
0
0
ILOAD = 750mA
2
4
SUPPLY VOLTAGE (V)
6
ILOAD =100mA
ILOAD =10mA
2
4
6
SUPPLY VOLTAGE (V)
8
February 2003
5
MIC3975
MICREL [ MICREL SEMICONDUCTOR ]
