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LD1084D2T18-R

5A LOW DROP POSITIVE VOLTAGE REGULATOR ADJUSTABLE AND FIXED

STMicroelectronics 

LD1084

SERIES

5A LOW DROP POSITIVE VOLTAGE

REGULATOR ADJUSTABLE AND FIXED

I TYPICAL DROPOUT 1.3V (AT 5A)

I THREE TERMINAL ADJUSTABLE OR FIXED

OUTPUT VOLTAGE 1.5, 1.8V, 2.5V, 2.85V,

3.3V, 3.6V, 5V, 8V, 9V, 12V.

I GUARANTEED OUTPUT CURRENT UP TO

5A

I OUPUT TOLERANCE ±1% AT 25°C AND

±2% IN FULL TEMPERATURE RANGE

I INTERNAL POWER AND THERMAL LIMIT

I WIDE OPERATING TEMPERATURE RANGE

-40°C TO 125°C

I PACKAGE AVAILABLE: TO-220, D2PAK,

D2PAK/A

I PINOUT COMPATIBILITY WITH STANDARD

ADJUSTABLE VREG

DESCRIPTION

The LD1084 is a LOW DROP Voltage Regulator

able to provide up to 5A of Output Current.

Dropout is guaranteed at a maximum of 1.5V at

the maximum output current, decreasing at lower

loads. The LD1084 is pin to pin compatible with

the older 3-terminal adjustable regulators, but has

better performances in term of drop and output

tolerance.

D2PAK

TO-220

D2PAK/A

A 2.85V output version is suitable for SCSI-2

active termination. Unlike PNP regulators, where

a part of the output current is wasted as quiescent

current, the LD1084 quiescent current flows into

the load, so increase efficiency. Only a 10µF

minimum capacitor is need for stability.

The device is supplied in TO-220, D2PAK and

D2PAK/A. On chip trimming allows the regulator to

reach a very tight output voltage tolerance, within

±1% at 25°C.

Figure 1: Schematic Diagram

February 2005

Rev. 4

1/20

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