Datasheet > 508595E

508595E

更新时间： 2024-11-27 23:21:39

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数据手册

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508595E 数据手册

LT1083/84/85 Fixed

3A, 5A, 7.5A Low Dropout

Positive Fixed Regulators

FEATURES

DESCRIPTION

■

Three-Terminal 3.3V, 3.6V, 5V and 12V

Output Current of 3A, 5A or 7.5A

Operates Down to 1V Dropout

The LT1083 series of positive adjustable regulators are

designedtoprovide3A, 5Aand7.5Awithhigherefficiency

than currently available devices. All internal circuitry is

■

Guaranteed Dropout Voltage at Multiple Current Levels designedtooperatedownto1Vinputtooutputdifferential

■

Line Regulation: 0.015%

and the dropout voltage is fully specified as a function of

load current. Dropout is guaranteed at a maximum of 1.5V

at maximum output current, decreasing at lower load

currents. On-chip trimming adjusts the output voltage to

1%. Current limit is also trimmed, minimizing the stress

on both the regulator and power source circuitry under

overload conditions.

Load Regulation: 0.1%

100% Thermal Limit Functional Test

Adjustable Versions Available

APPLICATIONS

■

High Efficiency Linear Regulators

The 1083 series devices are pin compatible with older

three-terminal regulators. A 10µF output capacitor is

required on these new devices; however, this is usually

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.

LT1083

LT1084

LT1085

7.5 Amps

5.0 Amps

3.0 Amps

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

TYPICAL APPLICATION

5V, 7.5A Regulator

Dropout Voltage vs Output Current

≥ 6.5V

5V AT 7.5A

LT1083-5

22µF*

TANTALUM

10µF

*REQUIRED FOR STABILITY

LT1083/4/5 TA01

FULL LOAD

OUTPUT CURRENT (A)

1083/4/5 TA02

12 3 4 5 6 7...12

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