Datasheet

LT1965 Series
9
1965fb
For more information www.linear.com/LT1965
typical perForMance characteristics
SHDN Pin Input Current ADJ Pin Bias Current
Current Limit vs V
IN
– V
OUT
Current Limit vs Temperature Reverse-Output Current
Reverse-Output Current
Ripple Rejection vs Frequency
SHDN Pin Input Current
SHDN PIN VOLTAGE (V)
0
SHDN PIN INPUT CURRENT (µA)
2
4
6
1
3
5
4 8 12 16 20
20 6 10 14 18
1965 G27
5.0
SHDN PIN INPUT CURRENT (µA)
5.2
5.4
5.6
5.8
6.0
5.1
5.3
5.5
5.7
5.9
1965 G28
TEMPERATURE (°C)
–50 –25 0 25 50 75 125100 150
V
SHDN
= 20V
0
ADJ PIN BIAS CURRENT (µA)
1.0
2.0
3.0
4.0
4.5
0.5
1.5
2.5
3.5
1965 G29
TEMPERATURE (°C)
–50 –25 0 25 50 75 125100 150
0
CURRENT LIMIT (A)
0.5
1.5
2.5
1.0
2.0
1965 G30
INPUT/OUTPUT DIFFERENTIAL (V)
0 2 4 6 8 10 12 14 16 18 20
∆V
OUT
= 100mV
T
J
= –50°C
T
J
= 125°C
T
J
= 150°C
T
J
= 25°C
0
CURRENT LIMIT (A)
1.0
2.0
3.0
0.5
1.5
2.5
1965 G31
TEMPERATURE (°C)
–50 –25 0 25 50 75 125100 150
V
IN
= 7V
V
OUT
= 0V
0
REVERSE OUTPUT CURRENT (mA)
2
4
6
1
3
5
1965 G32
OUTPUT VOLTAGE (V)
0 1 432 5 6 7 8 9
LT1965
LT1965-1.5
LT1965-1.8
LT1965-3.3
T
J
= 25°C
V
IN
= 0V
V
OUT
= V
ADJ
(LT1965)
V
OUT
= V
SENSE
(LT1965-1.5/-1.8/-2.5/-3.3)
CURRENT FLOWS INTO
OUTPUT PIN
LT1965-2.5
0
REVERSE OUTPUT CURRENT (mA)
0.1
0.5
0.4
0.3
0.2
0.6
1965 G33
TEMPERATURE (°C)
LT1965
V
IN
= 0V
V
OUT
= 1.2V (LT1965)
V
OUT
= 1.5V (LT1965-1.5)
V
OUT
= 1.8V (LT1965-1.8)
V
OUT
= 2.5V (LT1965-2.5)
V
OUT
= 3.3V (LT1965-3.3)
LT1965-1.5/-1.8/-2.5/-3.3
–50 –25 0 25 50 75 125100 150
FREQUENCY (Hz)
20
RIPPLE REJECTION (dB)
30
50
60
80
90
10 1k 10k 1M
10
100
100k
70
40
0
1965 G34
I
L
= 0.75A
C
OUT
= 10µF CERAMIC
V
IN
= V
OUT(NOMINAL)
+ 1V + 50mV
RMS
RIPPLE