Datasheet
LT3015 Series
11
3015fb
Load Regulation Current Limit vs V
IN
–V
OUT
Current Limit vs Temperature
TEMPERATURE (°C)
–75
0
LOAD REGULATION (mV)
–20
–30
–40
–50
–60
–70
–10
–80
75 100 125 150 175–25–50 0 25
3015 G37
50
LT3015
LT3015-2.5
LT3015-3
LT3015-3.3
LT3015-5
LT3015-12
LT3015-15
V
IN
= V
OUT(NOMINAL)
–1V
(LT3015-2.5/-3/-3.3/-5/-12/-15)
V
IN
= –2.3V (LT3015)
∆I
L
= –1mA TO –1.5A
INPUT/OUTPUT DIFFERENTIAL (V)
0
0.0
CURRENT LIMIT (A)
–0.4
–0.6
–0.8
–1.0
–1.2
–1.4
–1.6
–1.8
–2.0
–0.2
–2.2
–20 –25 –30–10–5 –15
3015 G38
V
OUT
= 0V
–55°C
25°C
125°C
TEMPERATURE (°C)
–75
0.0
CURRENT LIMIT (A)
–0.4
–0.6
–0.8
–1.0
–1.2
–1.4
–1.6
–1.8
–2.0
–0.2
–2.2
75 100 125 150 175–25–50 0 25
3015 G39
50
V
IN
=
–2.3V
V
OUT
= 0V
LT3015 Input Ripple Rejection LT3015 Input Ripple Rejection Ripple Rejection vs Temperature
FREQUENCY (Hz)
10
0
RIPPLE REJECTION (dB)
20
10
30
40
50
60
70
10M100 1k 10k 100k 1M
3015 G40
T
J
=
25°C
I
L
=
–1.5A
V
OUT
= –1.22V
V
IN
= –2.7V + 50V
RMS
RIPPLE
C
OUT
= 47µF
C
OUT
= 10µF
FREQUENCY (Hz)
10
0
RIPPLE REJECTION (dB)
20
10
30
40
50
60
70
10M100 1k 10k 100k 1M
3015 G41
T
J
=
25°C
I
L
=
–1.5A
V
OUT
= –5V
V
IN
= –6.5V + 50V
RMS
RIPPLE
C
OUT
= 10µF, C
FF
= 0
C
OUT
= 10µF, C
FF
= 10nF
C
OUT
= 47µF, C
FF
= 10nF
TEMPERATURE (°C)
–75
0
RIPPLE REJECTION (dB)
10
20
30
40
50
60
70
75 100 125 150 175–25–50 0 25
3015 G42
50
I
L
= –1.5A
V
OUT
= –1.22V
V
IN
= –2.7V + 0.5V
P-P
RIPPLE AT f = 120Hz
Minimum Input Voltage Output Noise Spectral Density
RMS Output Noise
vs Load Current
TEMPERATURE (°C)
–75
0
MINIMUM INPUT VOLTAGE (V)
–1.0
–0.8
–0.6
–0.4
–0.2
–1.2
–1.4
–1.6
–1.8
–2.0
–2.2
75 100 125 150 175–25–50 0 25
3015 G43
50
I
L
= –1mA
V
SHDN
= V
IN
I
L
= –1.5A
FREQUENCY (Hz)
10 100 1k 10k
0.1
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
1
10
100k
3015 G44
C
OUT
= 10µF
I
L
= –1.5A
I
FB-DIVIDER
= 100µA
V
OUT
= –5V
C
FF
= 10nF
V
OUT
= –1.22V
V
OUT
= –5V
C
FF
= 0
LT3015
LT3015-2.5
LT3015-5
LT3015-12
LT3015-15
LOAD CURRENT (A)
–1m –10m –100m
0
OUTPUT NOISE (µV
RMS
)
150
100
50
550
250
200
300
450
400
350
500
–1
3015 G45
C
OUT
= 10µF
f = 10Hz TO 100kHz
I
FB-DIVIDER
= 100µA
NOISE AT V
OUT
= –1.22V
NOISE AT V
OUT
= –5V, C
FF
= 0
NOISE AT V
OUT
= –5V, C
FF
= 100pF
NOISE AT V
OUT
= –5V, C
FF
= 1nF
NOISE AT V
OUT
= –5V, C
FF
= 10nF
LT3015-2.5
LT3015-12
LT3015-15
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.