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October 2002

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THREE TERMINAL ADJUSTABLE OR FIXED

OUTPUT VOLTAGE 1.5V,1.8V, 2.5V, 3.0, 3.3V

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OUTPUT CURRENT UP TO 7.5A

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1.4V MAX DROPOUT VOLTAGE AT FULL

LOAD

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LINE REGULATION: MAX 0.2% OVER FULL

TEMPERATURE RANGE

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LOAD REGULATION: MAX 0.5% OVER FULL

TEMPERATURE RANGE

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OUTPUT CURRENT LIMIT

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THERMAL SHUTDOWN PROTECTION

WITH HYSTERESIS

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WIDE OPERATING TEMPERATURE RANGE

-40°C TO 125°C

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PINOUT COMPATIBILITY WITH STANDARD

ADJUSTABLE VREG

DESCRIPTION

The KD1083 is a low drop linear voltage regulator,

proposed both in adjustable and fixed version and

designed for use in applications requiring output

currents

up

to

7.5A.

Dropout

voltage

is

guaranteed not to exceed 1.4V at maximum

output

current

while

it

decreases

at

lighter loads. The KD1083 also features an

on-chip output current limit function and a thermal

shutdown protection with hysteresis, preventing

from excessive

power dissipation in case of

insufficient heatsinking. The KD1083 is fully pin to

pin compatible with the older 3-terminal adjustable

regulators, but it has better performances in terms

of drop and output voltage precision.

On chip trimming allows the regulator to reach a

very tight output voltage tolerance, within ±2% at

25°C and 2% over the full temperature range.

Unlike voltage regulators using a PNP transistor

as series pass element in which a considerable

fraction of the output current is wasted as

quiescent current, the LD1083 quiescent current

flows almost entirely into the load, improving the

efficiency.

Only a 10µF minimum capacitor is required for

output stability.

KD1083

7.5A LOW DROP POSITIVE VOLTAGE REGULATOR

ADJUSTABLE AND FIXED

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

SCHEMATIC DIAGRAM

TO-220

PRELIMINARY DATA