LT1763 Series
Typical perForMance characTerisTics
SHDN Pin Input Current
ADJ Pin Bias Current
Current Limit
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
140
120
100
80
V
= 20V
V
= 0V
SHDN
OUT
60
40
20
0
–25
0
25
50
75
125
–50
0
25
50
75
125
–50
100
100
4
7
–25
0
2
3
5
6
1
TEMPERATURE (°C)
INPUT VOLTAGE (V)
TEMPERATURE (°C)
1763 G37
1763 G38
1763 G39
Current Limit
Reverse Output Current
Reverse Output Current
20
18
16
14
12
10
8
1.2
1.0
0.8
0.6
0.4
0.2
0
100
90
80
70
60
50
40
30
20
10
0
V
V
V
V
V
V
V
= 0V, V
= 1.22V (LT1763)
OUT
IN
V
V
= 7
OUT
T = 25°C, V = 0V
IN
J
IN
LT1763-1.5
= 1.5V (LT1763-1.5)
= 1.8V (LT1763-1.8)
= 2.5V (LT1763-2.5)
= 3V (LT1763-3)
= 0V
OUT
OUT
OUT
OUT
OUT
OUT
CURRENT FLOWS
INTO OUTPUT PIN
V
= V
(LT1763)
OUT
ADJ
= 3.3V (LT1763-3.3)
= 5V (LT1763-5)
LT1763
LT1763-1.8
LT1763-2.5
LT1763-3
LT1763-1.5/-1.8/
-2.5/-3/-3.3/-5
LT1763-3.3
6
4
LT1763
LT1763-5
2
0
–50
0
25
50
75 100 125
4
–50
0
25
50
75
125
–25
0
1
2
3
6
7
8
9
10
–25
100
5
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
1763 G40
1763 G42
1763 G41
Input Ripple Rejection
Input Ripple Rejection
Ripple Rejection
68
66
64
62
60
58
56
54
52
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
C
BYP
= 0.01µF
C
= 10µF
OUT
C
= 1000pF
BYP
C
= 100pF
BYP
I
= 500mA
= V
V
= V
+
OUT (NOMINAL)
L
IN
I
= 500mA
IN
L
V
+
1V + 0.5V RIPPLE
P-P
OUT(NOMINAL)
V
= V
+
C
= 4.7µF
IN
OUT(NOMINAL)
OUT
1V + 50mV
C
RIPPLE
AT f = 120Hz
RMS
1V + 50mV
C
RIPPLE
1k
RMS
= 0
I
= 500mA
BYP
= 10µF
L
OUT
–25
0
25
50
75
125
–50
100
10
100
1k
10k
100k
1M
10
100
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
TEMPERATURE (°C)
1763 G43
1763 G44
1763 G45
1763fh
10
For more information www.linear.com/LT1763