Datasheet
LT3055
7
3055f
For more information www.linear.com/LT3055
Input Ripple Rejection Load RegulationMinimum Input Voltage
Reverse Output Current Input Ripple RejectionInput Ripple Rejection
TYPICAL PERFORMANCE CHARACTERISTICS
T
J
= 25°C, unless otherwise noted.
TEMPERATURE (°C)
–75
OUTPUT CURRENT (µA)
60
80
100
125
3055 G19
40
20
50
70
90
30
10
0
–25
25
75
–50 150
0
50
100
175
V
OUT
= V
ADJ
= 1.2V
V
IN
= 0V
I
ADJ
I
OUT
FREQUENCY (Hz)
10 100
30
RIPPLE REJECTION (dB)
40
50
60
70
1k 10k 100k 1M 10M
3055 G20
20
10
0
80
90
C
REF/BYP
= 0pF
C
REF/BYP
= 100pF
C
REF/BYP
= 10nF
I
LOAD
= 500mA
C
OUT
= 10µF
V
OUT
= 3.3V
V
IN
= 4.3V + 50mV
RMS
RIPPLE
FREQUENCY (Hz)
10 100
30
RIPPLE REJECTION (dB)
40
50
60
70
1k 10k 100k 1M 10M
3055 G21
20
10
0
80
90
C
OUT
= 10µF
C
OUT
= 3.3µF
I
LOAD
= 500mA
C
REF/BYP
= 10nF
V
OUT
= 3.3V
V
IN
= 4.3V + 50mV
RMS
RIPPLE
TEMPERATURE (°C)
–75
0
RIPPLE REJECTION (dB)
10
30
40
50
75 100 125 150
90
3055 G22
20
–50 –25 0 25 50 175
60
70
80
I
LOAD
= 500mA
C
REF/BYP
= 10nF
V
OUT
= 3.3V
V
IN
= 4.3V + 50mV
RMS
RIPPLE
f = 120Hz
TEMPERATURE (°C)
–75
MINIMUM INPUT VOLTAGE (V)
0.6
1.8
2.0
2.2
–25
25
50 75 100 125 150 175
3055 G23
0.2
1.4
1.0
0.4
1.6
0
1.2
0.8
–50
0
I
LOAD
= 500mA
TEMPERATURE (°C)
–75
LOAD REGULATION (nV)
0
1
2
150125
3055 G24
–1
–2
–4
–25
25
75
–50 175
0
50
100
–3
4
3
∆I
L
= 1mA TO 500mA
V
OUT
= 0.6V
V
IN
= 2.2V
FREQUENCY (Hz)
0.1
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
1
10 1k 10k 100k
3055 G25
0.01
100
10
V
OUT
= 5V
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 1.2V
V
OUT
= 0.6V
C
OUT
= 10µF
I
L
= 500mA
FREQUENCY (Hz)
0.1
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
1
10 1k 10k 100k
3055 G26
0.01
100
10
V
OUT
= 5V
V
OUT
= 0.6V
C
OUT
= 10µF
I
L
= 500mA
C
REF/BYP
= 100pF
C
REF/BYP
= 1nF
C
REF/BYP
= 10nF
FREQUENCY (Hz)
0.1
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
1
10 1k 10k 100k
3055 G27
0.01
100
10
V
OUT
= 5V
C
OUT
= 10µF
I
L
= 500mA
C
FF
= 0pF
C
FF
= 100pF
C
FF
= 1nF
C
FF
= 10nF
Output Noise Spectral Density
C
REF/BYP
= 0, C
FF
= 0
Output Noise Spectral Density
vs C
REF/BYP
, C
FF
= 0
Output Noise Spectral Density
vs C
FF
, C
REF/BYP
= 10nF