Datasheet > 508591B

508591B

更新时间： 2024-11-27 23:21:39

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IC SMD

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508591B 数据手册

LT1083/LT1084/LT1085

7.5A, 5A, 3A Low Dropout

Positive Adjustable Regulators

DESCRIPTIO

FEATURES

The LT^®1083 series of positive adjustable regulators are

designedtoprovide7.5A, 5Aand3Awithhigherefficiency

than currently available devices. All internal circuitry is

■

Three-Terminal Adjustable

■

Output Current of 3A, 5A or 7.5A

■

Operates Down to 1V Dropout

■

Guaranteed Dropout Voltage at Multiple Current Levels designed to operate down to 1V input-to-output differen-

■

Line Regulation: 0.015%

Load Regulation: 0.1%

100% Thermal Limit Functional Test

Fixed Versions Available

tial and the dropout voltage is fully specified as a function

of load current. Dropout is guaranteed at a maximum of

1.5Vatmaximumoutputcurrent, decreasingatlowerload

currents. On-chip trimming adjusts the reference voltage

to1%. Currentlimitisalsotrimmed, minimizingthestress

on both the regulator and power source circuitry under

overload conditions.

APPLICATIO S

■

High Efficiency Linear Regulators

The LT1083/LT1084/LT1085 devices are pin compatible

with older three-terminal regulators. A 10µF output ca-

pacitor is required on these new devices. However, this is

included in most regulator designs.

■

Post Regulators for Switching Supplies

■

Constant Current Regulators

Battery Chargers

■

DEVICE

OUTPUT CURRENT*

Unlike PNP regulators, where up to 10% of the output

current is wasted as quiescent current, the LT1083 quies-

cent current flows into the load, increasing efficiency.

, LTC and LT are registered trademarks of Linear Technology Corporation.

LT1083

LT1084

LT1085

7.5A

5.0A

3.0A

*For a 1.5A low dropout regulator see the LT1086 data sheet.

TYPICAL APPLICATIO

5V, 7.5A Regulator

Dropout Voltage vs Output Current

LT1083

ADJ

5V AT 7.5A

OUT

≥ 6.5V

121Ω

10µF

10µF*

TANTALUM

365Ω

*REQUIRED FOR STABILITY

1083/4/5 ADJ TA01

FULL LOAD

OUTPUT CURRENT

1083/4/5 ADJ TA02

12 3 4 5 6 7...16

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