Datasheet

LT1762 Series
8
Rev B
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TYPICAL PERFORMANCE CHARACTERISTICS
SHDN Pin Input Current SHDN Pin Input Current ADJ Pin Bias Current
Current Limit Current Limit Reverse Output Current
Reverse Output Current Input Ripple Rejection Input Ripple Rejection
SHDN PIN VOLTAGE (V)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
SHDN PIN INPUT CURRENT (μA)
1762 G28
0 1 2 3
4
5
6 7 8 9
10
TEMPERATURE (°C)
–50 100
1762 G29
0 50
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–25 25 75
125
SHDN PIN INPUT CURRENT (
μA)
V
SHDN
= 20V
TEMPERATURE (°C)
–50
ADJ PIN BIAS CURRENT (nA)
0
50
75
1762 G30
–25
25
100
125
140
120
100
80
60
40
20
0
500
450
400
350
300
250
200
150
100
50
0
INPUT VOLTAGE (V)
0
SHORT-CIRCUIT CURRENT (mA)
2
4
5
1762 G31
1
3
6
7
V
OUT
= 0V
500
450
400
350
300
250
200
150
100
50
0
SHORT-CIRCUIT CURRENT (mA)
1762 G32
V
IN
= 7V
V
OUT
= 0V
TEMPERATURE (°C)
–50 0
50
75
–25
25
100
125
OUTPUT VOLTAGE (V)
100
90
80
70
60
50
40
30
20
10
0
REVERSE OUTPUT CURRENT (μA)
1762 G33
0 1 2 3
4
5
6 7 8 9 10
T
J
= 25°C, V
IN
= 0V
CURRENT FLOWS
INTO OUTPUT PIN
V
OUT
= V
SENSE
(LT1762-2.5/-3/-3.3/-5)
V
OUT
= V
ADJ
(LT1762)
LT1762
LT1762-5
LT1762-3
LT1762-2.5
LT1762-3.3
TEMPERATURE (°C)
–50
REVERSE OUTPUT CURRENT (μA)
30
25
20
15
10
5
0
0
50
75
1762 G34
–25
25
100
125
V
IN
= 0V
V
OUT
= 1.22V (LT1762)
V
OUT
= 2.5V (LT1762-2.5)
V
OUT
= 3V (LT1762-3)
V
OUT
= 3.3V (LT1762-3.3)
V
OUT
= 5V (LT1762-5)
LT1762
LT1762-2.5/-3/-3.3/-5
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
0
10 1k 10k
1M
1762 G35
100 100k
I
L
= 150mA
V
IN
= V
OUT(NOMINAL)
+
1V + 50mV
RMS
RIPPLE
C
BYP
= 0
C
OUT
= 2.2μF
C
OUT
= 10μF
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
80
70
60
50
40
30
20
10
0
10 1k 10k
1M
1762 G36
100 100k
I
L
= 150mA
V
IN
= V
OUT(NOMINAL)
+
1V + 50mV
RMS
RIPPLE
C
OUT
= 10μF
C
BYP
= 0.01μF
C
BYP
= 100pF
C
BYP
= 1000pF
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