Datasheet

LT1761 Series
11
1761sff
TYPICAL PERFORMANCE CHARACTERISTICS
ADJ Pin Bias Current Current Limit Current Limit
Reverse Output Current Reverse Output Current Input Ripple Rejection
SHDN Pin Threshold
(Off to On) SHDN Pin Input Current SHDN Pin Input Current
TEMPERATURE (°C)
–50
SHDN PIN THRESHOLD (V)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
50
75
1761 G27
–25
25
100
125
I
L
= 100mA
I
L
= 1mA
SHDN PIN VOLTAGE (V)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
SHDN PIN INPUT CURRENT (μA)
1761 G28
0123
4
5
678910
TEMPERATURE (°C)
–50
SHDN PIN INPUT CURRENT (μA)
0
50
75
1761 G29
–25
25
100
125
V
SHDN
= 20V
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
TEMPERATURE (oC)
–50
ADJ PIN BIAS CURRENT (nA)
100
90
80
70
60
50
40
30
20
10
0
0
50
75
1761 G30
–25
25
100
125
INPUT VOLTAGE (V)
0
SHORT-CIRCUIT CURRENT (mA)
2
4
5
1761 G31
1
3
6
7
350
300
250
200
150
100
50
0
V
OUT
= 0V
T
J
= 25°C
TEMPERATURE (°C)
–50
CURRENT LIMIT (mA)
0
50
75
1761 G32
–25
25
100
125
350
300
250
200
150
100
50
0
V
IN
= 7V
V
OUT
= 0V
OUTPUT VOLTAGE (V)
100
90
80
70
60
50
40
30
20
10
0
REVERSE OUTPUT CURRENT (μA)
1761 G33
0123
4
5
678910
T
J
= 25°C
V
IN
= 0V
CURRENT FLOWS
INTO OUTPUT PIN
V
OUT
= V
ADJ
(LT1761-BYP, -SD)
LT1761-BYP
LT1761-SD
LT1761-2
LT1761-3.3
LT1761-5
LT1761-1.8
LT1761-1.5
LT1761-2.5
LT1761-2.8
LT1761-3
LT1761-1.2
TEMPERATURE (°C)
–50
REVERSE OUTPUT CURRENT (μA)
25.0
22.5
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0
0
50
75
1761 G34
–25
25
100
125
V
IN
= 0V
V
OUT
= 1.22V (LT1761-BYP, -SD)
V
OUT
= 1.2V (LT1761-1.2)
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
LT1761-1.2,-1.5,-1.8,-2,
-2.5,-2.8,-3,-3.3,-5
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
0
10 1k 10k 1M
1761 G35
100 100k
I
L
= 100mA
V
IN
= V
OUT(NOMINAL)
+
1V + 50mV
RMS
RIPPLE
C
BYP
= 0
C
OUT
= 1μF
C
OUT
= 10μF
LT1761-BYP
LT1761-5