Datasheet

LT3085
5
3085fb
TYPICAL PERFORMANCE CHARACTERISTICS
TEMPERATURE (°C)
–50
MINIMUM IN VOLTAGE (V
IN
– V
OUT
) (mV)
200
300
150
3085 G10
100
0
0
50
100
–25
25
75
125
400
150
250
50
350
I
LOAD
= 500mA
I
LOAD
= 100mA
LOAD CURRENT (mA)
0
MINIMUM CONTROL VOLTAGE
(V
CONTROL
– V
OUT
) (V)
0.6
0.8
1.0
3085 G11
0.4
0.2
0
1.2
1.4
1.6
250 300 45050 100 150 200 350 400 500
T
J
= 125°C
T
J
= 25°C
T
J
= –50°C
TEMPERATURE (°C)
–50
MINIMUM CONTROL VOLTAGE
(V
CONTROL
– V
OUT
) (V)
0.8
1.2
150
3085 G12
0.4
0
0
50
100
–25
25
75
125
1.6
0.6
1.0
0.2
1.4
I
LOAD
= 500mA
I
LOAD
= 100mA
TEMPERATURE (°C)
–50
CURRENT LIMIT (mA)
300
500
150
3085 G13
0
0
50
100
–25
25
75
125
700
200
400
100
600
V
IN
= 7V
V
OUT
= 0V
INPUT-TO-OUTPUT DIFFERENTIAL (V)
0
CURRENT LIMIT (mA)
300
400
500
20 30
3085 G14
200
100
0
51015 25
600
700
35 40
T
J
= 25°C
TIME (μs)
0
OUTPUT VOLTAGE
DEVIATION (mV)
LOAD CURRENT
(mA)
–20
60
160
3085 G15
200
–40
0
40
20
100
0
4020
8060
120 140 180
100
200
V
OUT
= 1.5V
C
SET
= 0.1μF
V
IN
= V
CONTROL
= 3V
C
OUT
= 10μF CERAMIC
C
OUT
= 2.2μF CERAMIC
TIME (μs)
0
–50
50
150
80
3085 G16
–100
0
100
500
250
0
2010
4030
60 70 90
50
100
V
IN
= V
CONTROL
= 3V
V
OUT
= 1.5V
C
SET
= 0.1μF
OUTPUT VOLTAGE
DEVIATION (mV)
LOAD CURRENT
(mA)
C
OUT
= 10μF CERAMIC
C
OUT
= 2.2μF CERAMIC
TIME (μs)
0
IN/CONTROL
VOLTAGE (V)
OUTPUT VOLTAGE
DEVIATION (mV)
–50
100
80
3085 G17
6
4
–100
0
50
0
2
2010
4030
60 70 90
50
100
V
OUT
= 1.5V
I
LOAD
= 10mA
C
OUT
= 2.2μF
CERAMIC
C
SET
= 0.1μF
CERAMIC
TIME (μs)
0
IN/CONTROL
VOLTAGE (V)
OUTPUT VOLTAGE (V)
0
1.5
16
3085 G18
6
4
8
0.5
1
0
2
42
86
12 14 18
10
20
C
OUT
= 2.2μF
CERAMIC
R
SET
= 100k
C
SET
= 0
R
LOAD
= 2Ω
Dropout Voltage
(Minimum IN Voltage)
Dropout Voltage (Minimum
V
CONTROL
Pin Voltage)
Dropout Voltage (Minimum
V
CONTROL
Pin Voltage)
Current Limit Current Limit
Load Transient Response
Load Transient Response Line Transient Response Turn-On Response