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November 2002

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OUTPUT CURRENT LIMIT

s

LOW DROPOUT VOLTAGE: TYPICALLY

400mV AT 7A OUTPUT CURRENT

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OUTPUT VOLTAGE REMOTE SENSE PIN

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FAST TRANSIENT RESPONSE

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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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NO SUPPLY SEQUENCING PROBLEMS IN

DUAL SUPPLY MODE

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OUTPUT VOLTAGES AVAILABLE 1.5 V, 1.8V,

2.5 V, 3.0 V, 3.3 V ADJUSTABLE.

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 400mV at

7A

while

it

decreases

at

lighter loads.

This very low dropout is achieved thanks to a

which is also responsable 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.

On fixed voltage devices, the ADJ pin is still

available. A small capacitor on this pin helps to

improve transient response.

LD1580

7 A VERY 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

1

5

SPAK-5L

SPAK-7L

PRELIMINARY DATA