April 2008

Rev 8

1/19

19

LD1084xx

5 A low drop positive voltage regulator adjustable and fixed

Features

voltage 2.5 V, 5 V, 12 V.

full temperature range

125 °C

VREG

Description

The LD1084xx is a low drop voltage regulator

able to provide up to 5 A of output current.

Dropout is guaranteed at a maximum of 1.5 V at

the maximum output current, decreasing at lower

loads. The LD1084xx is pin to pin compatible with

the older 3-terminal adjustable regulators, but has

better performances in term of drop and output

tolerance.

A 2.85 V 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 LD1084xx quiescent current flows

into the load, so increase efficiency. Only a 10 µF

minimum capacitor is need for stability.

The device is supplied in TO-220. On chip

trimming allows the regulator to reach a very tight

output voltage tolerance, within ± 1 % at 25 °C.

TO-220

Table 1.

Device summary

Part numbers

Order codes

Output voltage

LD1084XX12

LD1084V12

12 V

LD1084XX25

LD1084V25

2.5 V

LD1084XX50

LD1084V50

5.0 V

LD1084XX

LD1084V

Adjustable

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