LD1085D2T33 데이터 시트보기 (PDF) - STMicroelectronics

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LD1085D2T33

3A LOW DROP POSITIVE VOLTAGE REGULATOR ADJUSTABLE AND FIXED

STMicroelectronics 

LD1085

SERIES

3A LOW DROP POSITIVE VOLTAGE

REGULATOR ADJUSTABLE AND FIXED

s TYPICAL DROPOUT 1.3V (AT 3A)

s THREE TERMINAL ADJUSTABLE OR FIXED

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

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

s GUARANTEED OUTPUT CURRENT UP TO

3A

s OUPUT TOLERANCE ±1% AT 25°C AND

±2% IN FULL TEMPERATURE RANGE

s INTERNAL POWER AND THERMAL LIMIT

s WIDE OPERATING TEMPERATURE RANGE

-40°C TO 125°C

s PACKAGE AVAILABLE : TO-220, TO-220FP

D2PAK, D2PAK/A

s PINOUT COMPATIBILITY WITH STANDARD

ADJUSTABLE VREG

DESCRIPTION

The LD1085 is a LOW DROP Voltage Regulator

able to provide up to 3A of Output Current.

Dropout is guaranteed at a maximum of 1.5V at

the maximum output current, decreasing at lower

loads. The LD1085 is pin to pin compatible with

the older 3-terminal adjustable regulators, but has

better performances in term of drop and output

tolerance .

TO-220

TO-220FP

D2PAK

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 LD1085 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, TO-220FP,

D2PAK and D2PAK/A. On chip trimming allows the

regulator to reach a very tight output voltage

tolerance, within ±1% at 25°C.

SCHEMATIC DIAGRAM

February 2003

1/19

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