LT3085 LINER [Linear Technology], LT3085 Datasheet - Page 6

• Manufacturer Part Number: LT3085
• Description: Adjustable 500mA Single Resistor Low Dropout Regulator
• Manufacturer: LINER [Linear Technology]

LT3085
TYPICAL PERFORMANCE CHARACTERISTICS
6
100
20
18
16
14
12
10
80
70
60
50
40
30
20
10
90
85
84
83
82
81
80
79
78
77
8
6
4
2
0
0
–50 –25
10
0
Ripple Rejection - Single Supply
V
Ripple Rejection (120Hz)
CONTROL
I
V
RIPPLE = 50mV
C
C
SINGLE SUPPLY OPERATION
V
RIPPLE = 50mV
I
C
LOAD
LOAD
IN
OUT
SET
IN
OUT
INPUT-TO-OUTPUT DIFFERENTIAL (V)
I
LOAD
= V
= V
I
= 0.1μF CERAMIC
6
LOAD
= 2.2μF CERAMIC
100
= 2.2μF, C
= 500mA
= 0.1A
CONTROL
OUT (NOMINAL)
0
= 1mA
= 500mA
Pin Currrent
12
FREQUENCY (Hz)
FREQUENCY (Hz)
25
P–P
1k
SET
P–P
= V
DEVICE IN
CURRENT LIMIT
, f = 120Hz
OUT (NOMINAL)
= 0.1μF
50
18
+2V
10k
75
24
I
LOAD
100 125 150
100k
+2V
= 100mA
30
3085 G25
3085 G19
3085 G22
1M
36
100
100
10k
80
70
60
50
40
30
20
10
90
10
1k
8
7
6
5
4
3
2
1
0
0
1
10
10
0
Ripple Rejection - Dual Supply
- V
Noise Spectral Density
V
CONTROL
V
V
V
V
RIPPLE = 50mV
C
C
IN
IN
IN
CONTROL
OUT
SET
CONTROL
= V
= V
= V
= 0.1μF CERAMIC
100
= 2.2μF CERAMIC
0.1
CONTROL
OUT
OUT (NOMINAL)
100
= V
= 1V
Pin Current
LOAD CURRENT (A)
I
FREQUENCY (Hz)
FREQUENCY (Hz)
Pin
LOAD
OUT (NOMINAL)
0.2
1k
P–P
= 2V
= 500mA
1k
+ 1V
I
LOAD
10k
0.3
+2V
T
= 100mA
T
J
T
J
10k
J
= –50°C
= 125°C
100k
= 25°C
0.4
3085 G20
3085 G26
3085 G23
100k
0.5
1M
10
1.0
1k
100
0.1
100μV/DIV
800
700
600
500
400
300
200
100
100
90
80
70
60
50
40
30
20
10
0
0
V
10
0
Residual Output Voltage with
Less Than Minimum Load
Ripple Rejection - Dual Supply
- IN Pin
OUT
SET PIN = 0V
V
V
V
RIPPLE = 50mV
C
C
IN
IN
CONTROL
OUT
SET
I
Output Voltage Noise
LOAD
V
R
C
C
I
LOAD
= V
OUT
SET
OUT
SET
V
= 0.1μF CERAMIC
= 2.2μF CERAMIC
100
IN
CONTROL
= O.1μF
= 500mA
= 100k
= 1V
= 10μF
= 1.1A
= 10V
= V
FREQUENCY (Hz)
OUT (NOMINAL)
1k
P–P
R
+2V
TEST
TIME 1ms/DIV
1k
R
TEST
V
(Ω)
V
OUT
IN
10k
= 5V
I
LOAD
+2V
V
IN
= 100mA
100k
= 20V
3085 G21
3085 G24
2k
1M
3085fa
3085 G27