LT1963A Series
The l denotes specifications which apply over the full operating
elecTrical characTerisTics
temperature range, otherwise specifications are at TA = 25°C. (Note 3)
PARAMETER
CONDITIONS
– V = 1.5V (Avg), V
MIN
TYP
MAX
UNITS
Ripple Rejection
V
= 0.5V ,
P-P
55
63
dB
IN
OUT
RIPPLE
f
= 120Hz, I
= 0.±5A
RIPPLE
LOAD
Current Limit
V
IN
V
IN
= ±V, V
= 0V
2
A
A
OUT
●
= V
+ 1V, ∆V
= –0.1V
1.6
OUT(NOMINAL)
OUT
Input Reverse Leakage Current (Note 13) Q, T, S8 Packages
ST Package
V
IN
V
IN
= –20V, V
= –20V, V
= 0
= 0
●
●
1
2
mA
mA
OUT
OUT
Reverse Output Current (Note 11)
LT1963A-1.5
LT1963A-1.8
LT1963A-2.5
LT1963A-3.3
LT1963A (Note 4)
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
= 1.5V, V < 1.5V
600
600
600
600
300
1200
1200
1200
1200
600
µA
µA
µA
µA
µA
IN
= 1.8V, V < 1.8V
IN
= 2.5V, V < 2.5V
IN
= 3.3V, V < 3.3V
IN
= 1.21V, V < 1.21V
IN
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
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 6: To satisfy requirements for minimum input voltage, the LT1963A
(adjustable version) is tested and specified for these conditions with an
external resistor divider (two 4.12k resistors) for an output voltage of 2.4V.
The external resistor divider will add a 300µA 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 – V
.
IN
DROPOUT
Note 8: GND pin current is tested with V = V
+ 1V and a
IN
OUT(NOMINAL)
current source load. The GND pin current will decrease at higher input
voltages.
Note 3: The LT1963A regulators are tested and specified under pulse load
conditions such that T ≈ T . The LT1963AE is 100% tested at T = 25°C.
J
A
A
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.
Performance at –40°C and 125°C is assured by design, characterization and
correlation with statistical process controls. The LT1963AI is guaranteed
over the full –40°C to 125°C operating junction temperature range. The
LT1963AMP is 100% tested and guaranteed over the –55°C to 125°C
operating junction temperature range.
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.
1963aff
6
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