LT1963A Series
TYPICAL PERFOR A CE CHARACTERISTICS
LT1963A-2.5 GND Pin Current
100
90
T
J
= 25°C
V
SHDN
= V
IN
*FOR V
OUT
= 2.5V
R
L
= 1.67, I
L
= 1.5A*
100
90
GND PIN CURRENT (mA)
GND PIN CURRENT (mA)
GND PIN CURRENT (mA)
80
70
60
50
40
30
20
10
0
0
1
2
R
L
= 2.5, I
L
= 1A*
R
L
= 5, I
L
= 500mA*
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
GND Pin Current vs I
LOAD
100
90
GND PIN CURRENT (mA)
V
IN
= V
OUT (NOMINAL)
+1V
SHDN PIN THRESHOLD (V)
SHDN PIN THRESHOLD (V)
80
70
60
50
40
30
20
10
0
0
0.2
0.4 0.6 0.8 1.0 1.2
OUTPUT CURRENT (A)
1.4
1.6
SHDN Pin Input Current
5.0
4.5
SHDN PIN INPUT CURRENT (µA)
SHDN PIN INPUT CURRENT (µA)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
2
4
6 8 10 12 14 16 18 20
SHDN PIN VOLTAGE (V)
1963 G24
5
4
3
2
1
0
–50 –25
ADJ PIN BIAS CURRENT (µA)
U W
LT1963A-3.3 GND Pin Current
T
J
= 25°C
V
SHDN
= V
IN
*FOR V
OUT
= 3.3V
R
L
= 2.2, I
L
= 1.5A*
LT1963A GND Pin Current
100
90
80
70
60
50
40
30
20
R
L
= 1.21, I
L
= 1A*
R
L
= 2.42, I
L
= 500mA*
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
R
L
= 0.81, I
L
= 1.5A*
T
J
= 25°C
V
SHDN
= V
IN
*FOR V
OUT
= 1.21V
80
70
60
50
40
30
20
10
0
0
1
2
R
L
= 3.3, I
L
= 1A*
R
L
= 6.6, I
L
= 500mA*
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
10
0
1963 G18
1963 G19
1963 G20
SHDN Pin Threshold (On-to-Off)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
1.0
SHDN Pin Threshold (Off-to-On)
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
I
L
= 1mA
I
L
= 1.5A
I
L
= 1mA
1963 G21
1963 G22
1963 G23
SHDN Pin Input Current
7
6
V
SHDN
= 20V
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
ADJ Pin Bias Current
50
25
75
0
TEMPERATURE (°C)
100
125
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
1963 G25
1963 G26
1963af
7
LINER [ LINEAR TECHNOLOGY ]
