LT1965T-1.8 查看數據表（PDF） - Linear Technology

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LT1965T-1.8

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

SHDN Pin Current (Note 10)

VSHDN = 0V

VSHDN = 20V

0.01

1

µA

5.5

10

µA

Quiescent Current in Shutdown VIN = 6V, VSHDN = 0V

0.01

1

µA

Ripple Rejection

VIN – VOUT = 1.5V (AVG), VRIPPLE = 0.5VP-P,

fRIPPLE = 120Hz, ILOAD = 0.75A

57

75

dB

Current Limit

VIN = 7V, VOUT = 0

2.4

A

VIN = VOUT(NOMINAL) + 1V, ∆VOUT = –0.1V (TJ < 125°C) (Note 6)

l 1.2

A

VIN = VOUT(NOMINAL) + 1V, ∆VOUT = –0.1V, (H-Grade, TJ > 125°C) (Note 6)

1.1

A

Input Reverse-Leakage Current VIN = –20V, VOUT = 0

1

mA

Reverse-Output Current (Note 11) 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

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 and performance is guaranteed from 0°C to 125°C.

Performance of the LT1965E over the full –40°C to 125°C operating

junction temperature range 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. The LT1965H is tested at 150°C operating junction temperature.

High junction temperatures degrade operating lifetimes. Operating lifetime

is derated at junction temperatures greater than 125°C.

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 (LT1965E, LT1965I) or 150°C (LT1965H)

when overtemperature is active. Continuous operation above the specified

maximum operating junction temperature may impair device reliability.

For more information www.linear.com/LT1965

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