lt3015edd Linear Technology Corporation, lt3015edd Datasheet - Page 8

• Manufacturer Part Number: lt3015edd
• Description: 1.5a, Low Noise, Negative Linear Regulator With Precision Current Limit
• Manufacturer: Linear Technology Corporation

200μV/DIV
LT3015
TYPICAL PERFORMANCE CHARACTERISTICS
8
V
–2.2
–2.0
–1.8
–1.6
–1.4
–1.2
–1.0
–0.8
–0.6
–0.4
–0.2
250
225
200
175
150
125
100
OUT
75
50
25
0
0
–75
10p
Minimum Input Voltage
RMS Output Noise
vs Feedforward Capacitor (C
LT3015 10Hz to 100kHz Output
Noise, C
C
V
I
C
L
V
V
OUT
OUT
FF
I
SHDN
= –1.5A
OUT
–50
L
= 10nF
FEEDFORWARD CAPACITANCE, C
= –1mA
= 10μF
= –5V
= –1.22V
100p
–25
= V
IN
FF
0
TEMPERATURE (°C)
= 10nF
25
1n
1ms/DIV
50
I
10n
f = 10Hz TO 100kHz
75 100 125 150 175
FB-DIVIDER
I
L
= –1.5A
V
OUT
C
OUT
100n
I
T
L
= –5V
FF
= 100μA
J
= –1.5A
FF
= 10μF
= 25°C
(F)
3015 G34
3015 G31
)
3015 G37
1μ
100μV/DIV
R
L
1V/DIV
2V/DIV
V
= 1kΩ
SHDN
V
V
OUT
OUT
0.1
10
1
10
Output Noise Spectral Density
LT3015 10Hz to 100kHz Output
Noise
C
V
C
SHDN Transient Response,
I
C
V
I
L
L
T
V
OUT
OUT
FF
OUT
OUT
J
SHDN
= –1.5A
= –5mA, C
= 0
= 25°C
V
= 10μF
= –5V
= 10μF
= –1.22V
OUT
= V
100
= –1.22V
IN
FREQUENCY (Hz)
FF
25ms/DIV
1ms/DIV
= 0
V
C
1k
OUT
FF
= 0
C
I
I
L
FB-DIVIDER
= –5V
V
C
OUT
= –1.5A
OUT
FF
= 10nF
= 10μF
= –5V
10k
= 100μA
T
3015 G32
3015 G23
3015 G35
A
100k
= 25°C, unless otherwise noted.
200μV/DIV
R
L
1V/DIV
2V/DIV
= 3.3Ω
V
V
SHDN
V
OUT
OUT
250
225
200
175
150
125
100
75
50
25
0
–1m
RMS Output Noise
vs Load Current
LT3015 10Hz to 100kHz Output
Noise, C
C
V
I
C
SHDN Transient Response,
I
C
V
C
L
L
C
I
T
f = 10Hz TO 100KHz
OUT
OUT
FF
OUT
OUT
FF
FB-DIVIDER
V
J
OUT
= –1.5A
= –1.5A, C
OUT
= 25°C
= 0
= 0
= 10μF
= –5V
= 10μF
= –5V
= 10μF
= –5V, C
FF
–10m
= 100μA
LOAD CURRENT (A)
= 0
FF
FF
= 10nF
250μs/DIV
1ms/DIV
= 0
V
V
OUT
OUT
–100m
V
= –5V, C
= –5V, C
OUT
V
= –5V, C
OUT
FF
FF
= –1.22V
= 120pF
= 1nF
FF
3015 G33
3015 G36
3015 G24
= 0
–1
3015f