4

LT1764A Series

1764afb

Current Limit

4

A

E Grade: LT1764A; LT1764A-1.5;

●

3.1

A

MP Grade: LT1764A

●

3.1

A

Input Reverse Leakage Current

●

1mA

600

1200

µA

600

1200

µA

600

1200

µA

600

1200

µA

300

600

µA

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: The LT1764A regulators are tested and specified under pulse load

characterization and correlation with statistical process controls. The

LT1764A (MP grade) is 100% tested and guaranteed over the –55

°C to

125

°C temperature range.

Note 3: The LT1764A (adjustable version) is tested and specified for these

conditions with the ADJ pin connected to the OUT pin.

Note 4. 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 max-

imum input voltage, the output current range must be limited. When operat-

ing at maximum output current, the input voltage range must be limited.

Note 5: To satisfy requirements for minimum input voltage, the LT1764A

(adjustable version) is tested and specified for these conditions with an

external resistor divider (two 4.12k resistors) for an output voltage of

2.42V. The external resistor divider will add a 300

µA DC load on the output.

Note 6: Dropout voltage is the minimum input to output voltage differential

needed to maintain regulation at a specified output current. In dropout, the

source load. The GND pin current will decrease 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 LT1764A, LT1764A-1.5 and LT1764A-1.8 dropout voltage

will be limited by the minimum input voltage specification under some

output voltage/load conditions.

Note 12. All combinations of absolute maximum input voltage and

absolute maximum output voltage cannot be achieved. The absolute

maximum differential from input to output is

±20V. For example, with

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

The

TYPICAL PERFOR A CE CHARACTERISTICS

Typical Dropout Voltage

OUTPUT CURRENT (A)

0

0

100

200

300

400

600

0.5

1.0

1.5

2.0

1764 G01

2.5

3.0

500

Guaranteed Dropout Voltage

OUTPUT CURRENT (A)

0

700

600

500

400

300

200

100

0

1.5

2.5

1764 G02

0.5

1.0

2.0

3.0

= TEST POINTS

TEMPERATURE (

°C)

–50

400

500

600

25

75

1764 G03

300

200

–25

0

50

100

125

100

0

Dropout Voltage