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LT1965T
(Rev.:RevA)

1.1A, Low Noise, Low Dropout Linear Regulator

Linear Technology 

LT1965 Series

ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. (Note 3)

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Current Limit

Input Reverse Leakage Current

Reverse Output Current (Note 11)

VIN = 7V, VOUT = 0

VIN = VOUT(NOMINAL) + 1V, ΔVOUT = -0.1V (Note 6)

VIN = –20V, VOUT = 0

LT1965-1.5, VOUT = 1.5V, VIN = 0

LT1965-1.8, VOUT = 1.8V, VIN = 0

LT1965-2.5, VOUT = 2.5V, VIN = 0

LT1965-3.3, VOUT = 3.3V, VIN = 0

LT1965 (Note 4), VOUT = 1.2V, VIN = 0

2.4

A

l 1.2

A

1

mA

275

525

μA

275

525

μA

275

525

μA

275

525

μA

175

400

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: Absolute maximum input to output differential voltage is not

achievable with all combinations of rated IN pin and OUT pin voltages.

With the IN pin at 22V, the OUT pin may not be pulled below 0V. The total

measured voltage from IN to OUT must not exceed ±22V.

Note 3: The LT1965 regulators are tested and specified under pulse load

conditions such that TJ ≅ TA. The LT1965E regulators are 100% tested

at TA = 25°C. Performance at –40°C and 125°C is assured by design,

characterization, and correlation with statistical process controls. The

LT1965I regulators are guaranteed over the full –40°C to 125°C operating

junction temperature range.

Note 4: The LT1965 adjustable version is tested and specified for these

conditions with the ADJ connected to the OUT pin.

Note 5: Maximum junction temperature limits operating conditions. The

regulated output voltage specification does not apply for all possible

combinations of input voltage and output current. Limit the output current

range if operating at the maximum input voltage. Limit the input-to-output

voltage differential if operating at the maximum output current.

Note 6: To satisfy minimum input voltage requirements, the LT1965

adjustable version is tested and specified for these conditions with an

external resistor divider (bottom 4.02k, top 4.32k) for an output voltage of

2.5V. The external resistor divider adds 300μA of output DC load current.

This external current is not factored into GND pin current.

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 equals: (VIN – VDROPOUT)

Note 8: GND pin current is tested with VIN = VOUT(NOMINAL) + 1V and a

current source load. GND pin current increases slightly in dropout. For

the fixed output versions, an internal resistor divider will typically add

100μA to the GND pin current. See GND pin current curves in the Typical

Performance Characteristics section.

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 of the GND pin.

Note 12: For the LT1965, LT1965-1.5 and LT1965-1.8, the minimum

input voltage specification limits the dropout voltage under some output

voltage/load conditions.

Note 13: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

1965fa

5

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