LT1963A Linear Technology, LT1963A Datasheet - Page 4

• Manufacturer Part Number: LT1963A
• Description: 1.5A/ Low Noise/ Fast Transient Response LDO Regulators
• Manufacturer: Linear Technology

LT1963A Series
The
PARAMETER
Input Reverse Leakage Current (Note 13) Q, T, S8 Packages V
Reverse Output Current (Note 11)
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Absolute maximum input to output differential voltage can not be
achieved with all combinations of rated IN pin and OUT pin voltages. With
the IN pin at 20V, the OUT pin may not be pulled below 0V. The total
measured voltage from IN to OUT can not exceed ±20V.
Note 3: The LT1963A regulators are tested and specified under pulse load
conditions such that T
T
characterization and correlation with statistical process controls.
Note 4: The LT1963A (adjustable version) is tested and specified for these
conditions with the ADJ pin connected to the OUT pin.
Note 5: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specification will not apply for
all possible combinations of input voltage and output current. When
operating at maximum input voltage, the output current range must be
limited. When operating at maximum output current, the input voltage
range must be limited.
Note 6: To satisfy requirements for minimum input voltage, the LT1963A
(adjustable version) is tested and specified for these conditions with an
TYPICAL PERFOR A CE CHARACTERISTICS
ELECTRICAL CHARACTERISTICS
4
A
= 25∞C. Performance at – 40∞C and 125∞C is assured by design,
500
450
400
350
300
250
200
150
100
50
0
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
0
Typical Dropout Voltage
0.2
0.4
OUTPUT CURRENT (A)
T
0.6
J
J
= 125°C
ª T
0.8
A
. The LT1963A is 100% tested at
T
J
= 25°C
1.0
1.2
W
1.4
1963 • G01
CONDITIONS
ST Package
LT1963A-1.5
LT1963A-1.8
LT1963A-2.5
LT1963A-3.3
LT1963A (Note 4) V
U
1.6
600
500
400
300
200
100
0
Guaranteed Dropout Voltage
0
V
V
V
V
V
TEST POINTS
0.2
IN
IN
OUT
OUT
OUT
OUT
OUT
= – 20V, V
= – 20V, V
0.4
= 1.5V, V
= 1.8V, V
= 2.5V, V
= 3.3V, V
= 1.21V, V
OUTPUT CURRENT (A)
T
0.6
J
≤ 125°C
OUT
OUT
IN
IN
IN
IN
0.8
external resistor divider (two 4.12k resistors) for an output voltage of
2.4V. The external resistor divider will add a 300mA DC load on the output.
Note 7: 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
Note 8: GND pin current is tested with V
current source load. The GND pin current will decrease at higher input
voltages.
Note 9: ADJ pin bias current flows into the ADJ pin.
Note 10: SHDN pin current flows into the SHDN pin.
Note 11: 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 12. For the LT1963A, LT1963A-1.5 and LT1963A-1.8 dropout voltage
will be limited by the minimum input voltage specification under some
output voltage/load conditions.
Note 13. For the ST package, the input reverse leakage current increases
due to the additional reverse leakage current for the SHDN pin, which is
tied internally to the IN pin.
IN
< 1.5V
< 1.8V
< 2.5V
< 3.3V
= 0V
= 0V
< 1.21V
1.0
T
J
1.2
≤ 25°C
1.4
1963 • G02
1.6
500
450
400
350
300
250
200
150
100
50
0
–50
IN
Dropout Voltage
– V
MIN
–25
DROPOUT
I
L
IN
= 1.5A
= V
0
TEMPERATURE (°C)
OUT(NOMINAL)
TYP
600
600
600
600
300
.
I
L
25
= 0.5A
A
I
L
= 25∞C. (Note 2)
50
= 100mA
1200
1200
1200
1200
MAX
600
1
2
+ 1V and a
75
I
L
= 1mA
100
1963 G03
UNITS
1963af
125
mA
mA
mA
mA
mA
mA
mA