Datasheet

LT1175
6
1175ff
TYPICAL PERFORMANCE CHARACTERISTICS
Typical Current Limit
Characteristics Guaranteed Current Limit Output Voltage Temperature Drift
Minimum Input-to-Output Voltage Minimum Input-to-Output Voltage
SENSE Bias Current
(Adjustable Part)
INPUT-TO-OUTPUT DIFFERENTIAL VOLTAGE (V)
0
CURRENT (A)
1.0
0.8
0.6
0.4
0.2
0
20
1175 G01
5
10
15
25
I
LIM2
, I
LIM4
TIED TO V
IN
I
LIM2
, I
LIM4
OPEN
I
LIM4
TIED TO V
IN
I
LIM2
TIED TO V
IN
CURRENT LIMIT CHANGES ONLY SLIGHTLY
WITH TEMPERATURE SO CURVES ARE
REPRESENTATIVE OF ALL TEMPERATURES
INPUT-TO-OUTPUT DIFFERENTIAL VOLTAGE (V)
0
CURRENT (A)
0.6
0.5
0.4
0.3
0.2
0.1
0
5101520
1175 G02
25
CURVES REPRE-
SENT MINIMUM
GUARANTEED
LIMITS AT ALL
TEMPERATURES
I
LIM2
, I
LIM4
OPEN
I
LIM4
TIED TO V
IN
I
LIM2
TIED TO V
IN
I
LIM2
, I
LIM4
TIED TO V
IN
JUNCTION TEMPERATURE (°C)
–50
VOLTAGE (V)
5.05
5.00
4.95
3.84
3.80
3.76
0
50
75
1175 G03
–25
25
100
125
OUTPUT
FIXED 5V PART
FEEDBACK VOLTAGE
ADJUSTABLE PART
OUTPUT CURRENT (A)
0
INPUT-TO-OUTPUT VOLTAGE (V)
1.0
0.8
0.6
0.4
0.2
0
0.2
0.4
0.5
1175 G04
0.1
0.3
0.6
0.7
T
J
= 25°C
V
IN
REDUCED
UNTIL OUTPUT
VOLTAGE
DROPS 1%
I
LIM2
, I
LIM4
OPEN
I
LIM2
, I
LIM4
TIED TO V
IN
I
LIM4
TIED
TO V
IN
I
LIM2
TIED
TO V
IN
OUTPUT CURRENT (A)
0
INPUT-TO-OUTPUT VOLTAGE (V)
1.0
0.8
0.6
0.4
0.2
0
0.2
0.4
0.5
1175 G05
0.1
0.3
0.6
0.7
V
IN
REDUCED UNTIL OUTPUT
VOLTAGE DROPS 1%.
I
LIM2
, I
LIM4
TIED TO V
IN
T
J
= 125°C
T
J
= –55°C
T
J
= 25°C
TEMPERATURE (°C)
–50
CURRENT (nA)
100
80
60
40
20
0
0
50
75
1175 G06
–25
25
100
125