Datasheet

7
LT3028
3028f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Output 2
Input Ripple Rejection
FREQUENCY (kHz)
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
0
0.01 1 10 1000
3028 G26
0.1 100
I
L
= 100mA
V
IN2
= 2.3V + 50mV
RMS
RIPPLE
C
BYP
= 0
T
J
= 25°C
C
OUT
= 10µF
C
OUT
= 1µF
FREQUENCY (kHz)
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
0
0.01 1 10 1000
3028 G27
0.1 100
I
L
= 100mA
V
IN2
= 2.3V + 50mV
RMS
RIPPLE
C
OUT
= 10µF
T
J
= 25°C
C
BYP
= 0.01µF
C
BYP
= 1000pF
C
BYP
= 100pF
Output 2
Input Ripple Rejection
Output 2
Input Ripple Rejection
TEMPERATURE (°C)
–50
RIPPLE REJECTION (dB)
100
3028 G28
050
80
70
60
50
40
30
20
10
0
25 25 75 125
V
IN2
= V
OUT2(NOMINAL)
+
1V + 0.5V
P-P
RIPPLE
AT f = 120Hz
I
L
= 50mA
Output 1
Input Ripple Rejection
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
0
10 1k 10k 1M
3028 G29
100 100k
I
L
= 500mA
V
IN1
= V
OUT1(NOMINAL)
+
1V + 50mV
RMS
RIPPLE
C
BYP
= 0
T
J
= 25°C
C
OUT
= 4.7µF
C
OUT
= 10µF
Output 1
Input Ripple Rejection
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
0
10 1k 10k 1M
3028 G30
100 100k
I
L
= 500mA
V
IN1
= V
OUT1(NOMINAL)
+
1V + 50mV
RMS
RIPPLE
C
OUT
= 10µF
T
J
= 25°C
C
BYP
= 0.01µF
C
BYP
= 100pF
C
BYP
= 1000pF
Output 1 Ripple Rejection
TEMPERATURE (°C)
–50
RIPPLE REJECTION (dB)
100
3028 G31
050
68
66
64
62
60
58
56
54
52
25 25 75 125
V
IN1
= V
OUT1(NOMINAL)
+
1V + 0.5V
P-P
RIPPLE
AT f = 120Hz
I
L
= 500mA
Output 2 Minimum Input Voltage
TEMPERATURE (°C)
–50
MINIMUM INPUT VOLTAGE (V)
2.5
2.0
1.5
1.0
0.5
0
0
50
75
3028 G32
–25
25
100
125
I
L
= 100mA
V
OUT2
= 1.22V
I
L
= 50mA
TEMPERATURE (°C)
–50
MINIMUM INPUT VOLTAGE (V)
0
50
75
3028 G33
–25
25
100
125
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
I
L
= 1mA
V
OUT1
= 1.22V
I
L
= 500mA
Output 1 Minimum Input Voltage