LT1175
TYPICAL PERFORMANCE CHARACTERISTICS
Typical Current Limit
Characteristics
1.0
CURRENT LIMIT CHANGES ONLY SLIGHTLY
WITH TEMPERATURE SO CURVES ARE
REPRESENTATIVE OF ALL TEMPERATURES
I
LIM2
, I
LIM4
TIED TO V
IN
CURRENT (A)
CURRENT (A)
0.4
0.3
0.2
I
LIM2
, I
LIM4
OPEN
0.2
I
LIM2
, I
LIM4
OPEN
0.1
0
3.80
0.6
I
LIM4
TIED TO V
IN
0.4
I
LIM2
TIED TO V
IN
0.6
I
LIM2
, I
LIM4
TIED TO V
IN
0.5
I
LIM4
TIED TO V
IN
CURVES REPRE-
SENT MINIMUM
GUARANTEED
LIMITS AT ALL
TEMPERATURES
VOLTAGE (V)
Guaranteed Current Limit
5.05
Output Voltage Temperature Drift
OUTPUT
FIXED 5V PART
5.00
0.8
4.95
I
LIM2
TIED TO V
IN
3.84
FEEDBACK VOLTAGE
ADJUSTABLE PART
0
5
15
20
0
25
10
INPUT-TO-OUTPUT DIFFERENTIAL VOLTAGE (V)
1175 G01
25
0
5
10
15
20
INPUT-TO-OUTPUT DIFFERENTIAL VOLTAGE (V)
1175 G02
3.76
–50
50
25
0
75 100
–25
JUNCTION TEMPERATURE (°C)
125
1175 G03
Minimum Input-to-Output Voltage
1.0
INPUT-TO-OUTPUT VOLTAGE (V)
INPUT-TO-OUTPUT VOLTAGE (V)
T
J
= 25°C
V
IN
REDUCED
UNTIL OUTPUT
VOLTAGE
DROPS 1%
I
LIM2
, I
LIM4
OPEN
I
LIM4
TIED
TO V
IN
I
LIM2
, I
LIM4
TIED TO V
IN
0
0.1
0.2 0.3 0.4
0.5
OUTPUT CURRENT (A)
0.6
0.7
1.0
Minimum Input-to-Output Voltage
100
V
IN
REDUCED UNTIL OUTPUT
VOLTAGE DROPS 1%.
I
LIM2
, I
LIM4
TIED TO V
IN
CURRENT (nA)
SENSE Bias Current
(Adjustable Part)
0.8
0.8
80
I
LIM2
TIED
TO V
IN
0.6
0.6
T
J
= 125°C
0.4
T
J
= 25°C
0.2
T
J
= –55°C
60
0.4
40
0.2
20
0
0
0
0.1
0.2 0.3 0.4
0.5
OUTPUT CURRENT (A)
0.6
0.7
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
1175 G04
1175 G05
1175 G06
1175ff
6
LINER [ LINEAR TECHNOLOGY ]
