Datasheet

LT1962 Series
9
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Typical perForMance characTerisTics
Current Limit Reverse Output Current Reverse Output Current
TEMPERATURE (°C)
–50
CURRENT LIMIT (A)
0.8
1.0
1.2
25 75
1962 G40
0.6
0.4
–25 0
50 100
125
0.2
0
V
IN
= 7V
V
OUT
= 0V
TEMPERATURE (°C)
–50
REVERSE OUTPUT CURRENT (µA)
20
25
30
25 75
1962 G42
15
10
–25 0
50 100
125
5
0
V
IN
= 0V
V
OUT
= 1.22V (LT1962)
V
OUT
= 1.5V (LT1962-1.5)
V
OUT
= 1.8V (LT1962-1.8)
V
OUT
= 2.5V (LT1962-2.5)
V
OUT
= 3V (LT1962-3)
V
OUT
= 3.3V (LT1962-3.3)
V
OUT
= 5V (LT1962-5)
LT1962
LT1962-1.5/-1.8/-2.5/-3/-3.3/-5
OUTPUT VOLTAGE (V)
0 1
REVERSE OUTPUT CURRENT (µA)
30
40
50
60
70
80
90
100
8 97
1962 G41
20
10
0
2 3
4
6
5
10
LT1962
LT1962-5
T
J
= 25°C
V
IN
= 0V
CURRENT FLOWS
INTO OUTPUT PIN
V
OUT
= V
ADJ
(LT1962)
LT1962-1.5
LT1962-1.8
LT1962-2.5
LT1962-3
LT1962-3.3
Input Ripple Rejection Input Ripple Rejection Ripple Rejection
FREQUENCY (Hz)
20
RIPPLE REJECTION (dB)
30
50
70
80
10 1k 10k
1M
1962 G43
10
100
100k
60
40
0
I
L
= 300mA
V
IN
= V
OUT(NOMINAL)
+ 1V
+ 50mV
RMS
RIPPLE
C
BYP
= 0
C
OUT
= 10µF
C
OUT
= 3.3µF
FREQUENCY (Hz)
20
RIPPLE REJECTION (dB)
30
50
70
80
10 1k 10k
1M
1962 G44
10
100
100k
60
40
0
I
L
= 300mA
V
IN
= V
OUT(NOMINAL)
+ 1V
+ 50mV
RMS
RIPPLE
C
OUT
= 10µF
C
BYP
= 0.01µF
C
BYP
= 1000pF
C
BYP
= 100pF
TEMPERATURE (°C)
–50
RIPPLE REJECTION (dB)
66
25
1962 G45
60
56
–25 0 50
54
52
68
64
62
58
75 100
125
I
L
= 300mA
V
IN
= V
OUT(NOMINAL)
+ 1V
+ 0.5V
P-P
RIPPLE AT f = 120Hz
LT1962 Minimum Input Voltage Load Regulation Output Noise Spectral Density
TEMPERATURE (°C)
–50
0
MINIMUM INPUT VOLTAGE (V)
0.25
0.75
1.00
1.25
2.50
1.75
0
50
75
1962 G46
0.50
2.00
2.25
1.50
–25
25
100
125
V
OUT
= 1.22V
I
L
= 300mA
I
L
= 1mA
TEMPERATURE (°C)
–50
LOAD REGULATION (mV)
–5
0
5
25 75
1962 G47
–10
–15
–25 0
50 100
125
–20
–25
LT1962
LT1962-2.5
LT1962-1.8
LT1962-1.5
V
IN
= V
OUT(NOMINAL)
+ 1V
∆I
L
= 1mA TO 300mA
LT1962-3
LT1962-3.3
LT1962-5
FREQUENCY (Hz)
0.1
OUTPUT NOISE SPECTRIAL DENSITY (µV/√Hz)
1
10 1k 10k
100k
1962 G48
0.01
100
10
LT1962
LT1962-2.5
LT1962-1.5
LT1962-5
LT1962-3.3
I
L
= 300mA
C
OUT
= 10µF
C
BYP
= 0
LT1962-3
LT1962-1.8
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