Datasheet

4
LT1763 Series
1763fa
Dropout Voltage
TEMPERATURE (°C)
–50
DROPOUT VOLTAGE (mV)
0
50
75
1763 G03
–25
25
100
125
500
450
400
350
300
250
200
150
100
50
0
I
L
= 500mA
I
L
= 1mA
I
L
= 10mA
I
L
= 50mA
I
L
= 250mA
I
L
= 100mA
Quiescent Current
TEMPERATURE (°C)
–50
QUIESCENT CURRENT (µA)
100
1763 G04
050–25 25 75 125
50
45
40
35
30
25
20
15
10
5
0
V
IN
= 6V
R
L
= ∞, I
L
= 0 (LT1763-1.5/-1.8/-2.5/-3/-3.3/-5)
R
L
= 250k, I
L
= 5µA (LT1763)
V
SHDN
= V
IN
Typical Dropout Voltage
Guaranteed Dropout Voltage
OUTPUT CURRENT (mA)
500
450
400
350
300
250
200
150
100
50
0
DROPOUT VOLTAGE (mV)
1763 G01
0 50 100 150
200
250
300 350 400 450 500
T
J
= 125°C
T
J
= 25°C
OUTPUT CURRENT (mA)
500
450
400
350
300
250
200
150
100
50
0
GUARANTEED DROPOUT VOLTAGE (mV)
1763 G02
0 50 100 150
200
250
300 350 400 450 500
T
J
≤ 125°C
T
J
≤ 25°C
= TEST POINTS
Note 6: Dropout voltage is the minimum input to output voltage differential
needed to maintain regulation at a specified output current. In dropout, the
output voltage will be equal to: V
IN
– V
DROPOUT
.
Note 7: GND pin current is tested with V
IN
= V
OUT(NOMINAL)
or V
IN
= 2.3V
(whichever is greater) and a current source load. This means the device is
tested while operating in its dropout region. This is the worst-case GND
pin current. The GND pin current will decrease slightly at higher input
voltages.
Note 8: ADJ pin bias current flows into the ADJ pin.
Note 9: SHDN pin current flows into the SHDN pin.
Note 10: Reverse output current is tested with the IN pin grounded and the
OUT pin forced to the rated output voltage. This current flows into the OUT
pin and out the GND pin.
Note 11: For the LT1763, LT1763-1.5 and LT1763-1.8 dropout voltage will
be limited by the minimum input voltage specification under some output
voltage/load conditions. See the curve of Minimum Input Voltage in the
Typical Performance Characteristics.
ELECTRICAL CHARACTERISTICS
TYPICAL PERFORMANCE CHARACTERISTICS
UW
LT1763-1.5
Output Voltage
LT1763-1.8
Output Voltage
TEMPERATURE (°C)
–50
OUTPUT VOLTAGE (V)
100
1763 G50
050
1.528
1.521
1.514
1.507
1.500
1.493
1.486
1.479
1.472
–25 25 75 125
I
L
= 1mA
TEMPERATURE (°C)
–50
OUTPUT VOLTAGE (V)
100
1763 G51
050
1.84
1.83
1.82
1.81
1.80
1.79
1.78
1.77
1.76
–25 25 75 125
I
L
= 1mA