April 2008

Rev 5

1/15

15

LD1580XX

7 A very low drop positive voltage regulator adjustable

Features

output current

125 °C

mode

Description

The LD1580 is a very low dropout positive linear

voltage regulator particularly suitable in

applications requiring output currents up to 7 A.

The LD1580 typical dropout voltage is 400 mV at

7 A while it decreases at lighter loads.

This very low dropout is achieved thanks to a

second input voltage pin, named VCONTROL,

which is also responsible of the output power

stage driving.

The LD1580 is provided with an output voltage

remote sense pin which reduces dramatically any

output voltage variations that could occur due to

load changes.

The ADJ pin is still available. A small capacitor on

this pin helps to improve transient response.

The LD1580 also features a built-in output current

limit function and a thermal shutdown protection

with hysteresis which prevents from excessive

power dissipation in case of insufficient

heatsinking. On chip trimming allows the regulator

to reach a very tight output voltage tolerance,

within ± 2 % at the maximum output current and

over the full temperature range.

Table 1.

Device summary

Part number

Order code

Packaging

LD1580XX

LD1580P2T-R

tape and reel

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