LT1761 Series
TYPICAL PERFOR A CE CHARACTERISTICS
SHDN Pin Threshold
(Off-to-On)
1.0
0.9
I
L
= 100mA
SHDN PIN INPUT CURRENT (µA)
SHDN PIN THRESHOLD (V)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–50 –25
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
SHDN PIN INPUT CURRENT (µA)
I
L
= 1mA
50
0
75
25
TEMPERATURE (°C)
ADJ Pin Bias Current
100
90
ADJ PIN BIAS CURRENT (nA)
80
70
60
50
40
30
20
10
0
–50 –25
50
0
75
25
TEMPERATURE (°C)
100
125
SHORT-CIRCUIT CURRENT (mA)
250
200
150
100
50
0
0
1
4
3
2
5
INPUT VOLTAGE (V)
6
7
1761 G31
CURRENT LIMIT (mA)
Reverse Output Current
100
REVERSE OUTPUT CURRENT (µA)
90
80
70
60
50
40
30
20
10
0
0
REVERSE OUTPUT CURRENT (µA)
T
J
= 25°C
V
IN
= 0V
CURRENT FLOWS
INTO OUTPUT PIN
V
OUT
= V
ADJ
(LT1761-BYP, -SD)
LT1761-1.5
LT1761-1.8
LT1761-2
LT1761-2.5
LT1761-2.8
LT1761-3
LT1761-BYP
LT1761-SD
RIPPLE REJECTION (dB)
LT1761-3.3
LT1761-5
1
2
3 4 5 6 7 8
OUTPUT VOLTAGE (V)
9
10
U W
100
1761 G27
1761 G30
SHDN Pin Input Current
1.0
0.9
SHDN Pin Input Current
1.4
V
SHDN
= 20V
1.2
1.0
0.8
0.6
0.4
0.2
0
–50 –25
125
0
0
1
2
3 4 5 6 7 8
SHDN PIN VOLTAGE (V)
9
10
50
25
0
75
TEMPERATURE (°C)
100
125
1761 G28
1761 G29
Current Limit
350
300
V
OUT
= 0V
T
J
= 25°C
350
300
250
200
150
100
50
Current Limit
V
IN
= 7V
V
OUT
= 0V
0
–50 –25
50
25
0
75
TEMPERATURE (°C)
100
125
1761 G32
Reverse Output Current
25.0
22.5
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0
–50 –25
LT1761-1.5,-1.8,-2,
-2.5,-2.8,-3,-3.3,-5
50
0
75
25
TEMPERATURE (°C)
100
125
V
IN
= 0V
V
OUT
= 1.22V (LT1761-BYP, -SD)
V
OUT
= 1.5V (LT1761-1.5)
V
OUT
= 1.8V (LT1761-1.8)
V
OUT
= 2V (LT1761-2)
V
OUT
= 2.5V (LT1761-2.5)
V
OUT
= 2.8V (LT1761-2.8)
V
OUT
= 3V (LT1761-3)
V
OUT
= 3.3V (LT1761-3.3)
V
OUT
= 5V (LT1761-5)
LT1761-BYP,-SD
Input Ripple Rejection
80
70
60
50
40
30
20
10
0
10
100
1k
10k
FREQUENCY (Hz)
100k
1M
1761 G35
LT1761-BYP
LT1761-5
I
L
= 100mA
V
IN
= V
OUT(NOMINAL)
+
1V + 50mV
RMS
RIPPLE
C
BYP
= 0
C
OUT
= 10µF
C
OUT
= 1µF
1761 G33
1761 G34
9
LINER [ LINEAR TECHNOLOGY ]
