Datasheet

LT3030
8
3030fa
For more information www.linear.com/LT3030
Typical perForMance characTerisTics
OUT1 Input Ripple Rejection OUT2 Input Ripple Rejection OUT2 Input Ripple Rejection
OUT2 Input Ripple Rejection Channel-to-Channel Isolation
Reverse Current OUT1 Input Ripple Rejection OUT1 Input Ripple Rejection
T
J
= 25°C, unless otherwise noted.
TEMPERATURE (°C)
–75
REVERSE CURRENT (µA)
500
450
400
350
300
250
200
150
100
50
0
75–25
3030 G28
17525 12550 1500 100
I
ADJ
= FLOWS INTO ADJ PIN TO GND PIN
I
OUT
= FLOWS INTO OUT PIN TO IN PIN
I
OUT2
I
ADJ1
OR I
ADJ2
I
OUT1
V
IN1
= V
IN2
= 0V
V
ADJ1
= V
OUT1
= 1.220V
V
ADJ2
= V
OUT2
= 1.220V
FREQUENCY (Hz)
10
RIPPLE REJECTION (dB)
100
90
80
70
60
50
40
30
20
10
0
1M100
3030 G29
10M10k 100k1k
C
OUT1
= 10µF
C
OUT1
= 47µF
C
OUT1
= 22µF
T
J
= 25°C
I
L1
= 750mA, C
BYP1
= 0
V
IN1
= V
OUT1(NOMINAL)
+ 1V
+ 50mV
RMS
RIPPLE
FREQUENCY (Hz)
10
RIPPLE REJECTION (dB)
100
90
80
70
60
50
40
30
20
10
0
1M100
3030 G30
10M10k 100k1k
C
BYP1
= 10nF
C
BYP1
= 100pF
C
BYP1
= 1000pF
T
J
= 25°C
I
L1
= 750mA, C
OUT1
= 22µF
V
IN1
= V
OUT1(NOMINAL)
+ 1V
+ 50mV
RMS
RIPPLE
TEMPERATURE (°C)
–75
RIPPLE REJECTION (dB)
100
90
80
70
60
50
40
30
20
10
0
50–50
3030 G31
1750 25–25 150100 12575
V
IN1
= V
OUT1(NOMINAL)
+ 1.5V
+ 500mV
P-P
RIPPLE
f = 120Hz
I
L1
= 750mA
FREQUENCY (Hz)
10
RIPPLE REJECTION (dB)
100
90
80
70
60
50
40
30
20
10
0
1M100
3030 G32
10M10k 100k1k
C
OUT2
= 3.3µF
C
OUT2
= 22µF
C
OUT2
= 10µF
T
J
= 25°C
I
L2
= 250mA, C
BYP2
= 0
V
IN2
= V
OUT2(NOMINAL)
+ 1V
+ 50mV
RMS
RIPPLE
FREQUENCY (Hz)
10
RIPPLE REJECTION (dB)
100
90
80
70
60
50
40
30
20
10
0
1M100
3030 G33
10M10k 100k1k
C
BYP2
= 10nF
C
BYP2
= 100pF
C
BYP2
= 1000pF
T
J
= 25°C
I
L2
= 250mA, C
OUT2
= 10µF
V
IN2
= V
OUT2(NOMINAL)
+ 1V
+ 50mV
RMS
RIPPLE
Channel-to-Channel Isolation
TEMPERATURE (°C)
–75
RIPPLE REJECTION (dB)
100
90
80
70
60
50
40
30
20
10
0
50–50
3030 G34
1750 25–25 150100 12575
V
IN2
= V
OUT2(NOMINAL)
+ 1.5V
+ 500mV
P-P
RIPPLE
f = 120Hz
I
L2
= 250mA
FREQUENCY (Hz)
10
CHANNEL-TO-CHANNEL ISOLATION (dB)
100
90
80
70
60
50
40
30
20
10
0
1M100
3030 G35
10M10k 100k1k
CHANNEL 2
CHANNEL 1
GIVEN CHANNEL IS TESTED WITH
50mV
RMS
SIGNAL ON OPPOSING
CHANNEL, BOTH CHANNELS
DELIVERING FULL CURRENT
T
J
= 25°C
50µs/DIV
V
OUT1
100mV/DIV
V
OUT2
100mV/DIV
3030 G36
C
OUT1
= 10µF
C
OUT2
= 3.3µF
C
BYP1
= C
BYP2
= 0.01µF
∆I
L1
= 50mA TO 750mA
∆I
L2
= 50mA TO 250mA
V
IN
= 6V, V
OUT1
= V
OUT2
= 5V