Datasheet
LT3045
10
Rev. B
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
Integrated RMS Output Noise
(10Hz to 100kHz)
Noise Spectral Density
Integrated RMS Output Noise
(10Hz to 100kHz)
Noise Spectral Density
Integrated RMS Output Noise
(10Hz to 100kHz)
Noise Spectral Density
T
J
= 25°C, unless otherwise noted.
Power Supply Ripple Rejection
Power Supply Ripple Rejection
as a Function of Error Amplifier
Input Pair
Power Supply Ripple Rejection
V
IN
= 5V
R
SET
= 30.1k
C
OUT
= 10µF
C
SET
= 0.47µF
I
L
= 500mA
I
L
= 300mA
I
L
= 100mA
I
L
= 50mA
I
L
= 1mA
FREQUENCY (Hz)
10
100
1k
10k
100k
1M
10M
20
40
60
80
100
120
140
PSRR (dB)
3045 G43
V
IN
= V
OUT
+ 2V
I
L
= 500mA
C
OUT
= 10µF
C
SET
= 0.47µF
V
OUT
≥ 1.3V
0.6V < V
OUT
< 1.3V
V
OUT
≤ 0.6V
FREQUENCY (Hz)
10
100
1k
10k
100k
1M
10M
20
30
40
50
60
70
80
90
100
110
120
PSRR (dB)
3045 G44
I
L
= 500mA
R
SET
= 30.1k
C
OUT
= 10µF
C
SET
= 0.47µF
100kHz
500kHz
1MHz
2MHz
INPUT–TO–OUTPUT DIFFERENTIAL (V)
0
1
2
3
4
5
0
10
20
30
40
50
60
70
80
90
100
PSRR (dB)
3045 G45
V
IN
= 5V
R
SET
= 33.2k
C
OUT
= 10µF
C
SET
= 4.7µF
LOAD CURRENT (mA)
0
50
100
150
200
250
300
350
400
450
500
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
RMS OUTPUT NOISE (µV
RMS
)
3045 G46
V
IN
= 5V
C
OUT
= 10µF
R
SET
= 33.2k
I
LOAD
= 500mA
SET PIN CAPACITANCE (µF)
0.01
0.1
1
10
100
0
1
2
3
4
5
6
7
8
9
RMS OUTPUT NOISE (µV
RMS
)
3045 G47
V
IN
= V
OUT
+ 2V
C
OUT
= 10µF
C
SET
= 4.7µF
I
LOAD
= 500mA
OUTPUT VOLTAGE (V)
0
1.5
3
4.5
6
7.5
9
10.5
12
13.5
15
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
RMS OUTPUT NOISE (µV
RMS
)
3045 G48
V
IN
= 5V
R
SET
= 33.2k
C
OUT
= 10µF
I
LOAD
= 500mA
C
SET
= 0.047µF
C
SET
= 0.47µF
C
SET
= 1µF
C
SET
= 4.7µF
C
SET
= 22µF
FREQUENCY (Hz)
10
100
1k
10k
100k
1M
10M
0.1
1
10
100
1000
OUTPUT NOISE (nV/√Hz)
3045 G49
V
IN
= 5V
R
SET
= 33.2k
C
SET
= 4.7µF
I
LOAD
= 500mA
C
OUT
= 10µF
C
OUT
= 22µF
FREQUENCY (Hz)
10
100
1k
10k
100k
1M
10M
0.1
1
10
100
1000
OUTPUT NOISE (nV/√Hz)
3045 G50
V
IN
= 5V
R
SET
= 33.2k
C
SET
= 4.7µF
C
OUT
= 10µF
I
L
= 500mA
I
L
= 300mA
I
L
= 100mA
I
L
= 10mA
I
L
= 1mA
FREQUENCY (Hz)
10
100
1k
10k
100k
1M
10M
0.1
1
10
100
1000
OUTPUT NOISE (nV/√Hz)
3045 G51
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