LT1084CM Datasheet

IC型号：
LT1084CM
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Linear Technology [3A, 5A, 7.5A Low Dropout Positive Fixed ...
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LT1083/84/85 Fixed

3A, 5A, 7.5A Low Dropout

Positive Fixed Regulators

FEATURES

DESCRIPTION

The LT1083 series of positive adjustable regulators are

designed to provide 3A, 5A and 7.5A with higher efficiency

than currently available devices. All internal circuitry is

designed to operate down to 1V input to output differential

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.

The 1083 series devices are pin compatible with older

three-terminal regulators. A 10碌F output capacitor is

required on these new devices; however, this is usually

included in most regulator designs.

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.

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

Output Current of 3A, 5A or 7.5A

Operates Down to 1V Dropout

Guaranteed Dropout Voltage at Multiple Current Levels

Line Regulation: 0.015%

Load Regulation: 0.1%

100% Thermal Limit Functional Test

Adjustable Versions Available

APPLICATIONS

High Efficiency Linear Regulators

Post Regulators for Switching Supplies

Constant Current Regulators

Battery Chargers

DEVICE

LT1083

LT1084

LT1085

OUTPUT CURRENT*

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

INPUT/OUTPUT VOLTAGE DIFFERENTIAL (V)

Dropout Voltage vs Output Current

鈮?/div>

6.5V

LT1083-5

5V AT 7.5A

10碌F

22碌F*

TANTALUM

*REQUIRED FOR STABILITY

LT1083/4/5 TA01

FULL LOAD

OUTPUT CURRENT (A)

FULL LOAD

1083/4/5 TA02

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