SPX1580 datasheet(3/5 Pages) SIPEX

Part #	SPX1580

Description	7A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed

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Manufacturer	SIPEX [Sipex Corporation]

Direct Link	http://www.sipex.com

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Date: 5/14/04

SPX1580 7A Ultra Dropout Voltage Regulator

The SPX1580 is designed as a high performance

and low cost solution for application requiring a

lower dropout than traditional NPN regulators.

The SPX1580 uses a separate input voltage VCTRL

( VCTRL ≥ VOUT + 1.3V) to minimize the dropout

voltage. This allows the 2.5V power for the load

to come from a 3.3V system supply.

As added benefit this will reduce the heat dissi-

pation*, and lower heatsink and cooling fan cost.

A typical application would use 3.3V for VIN

and 5.0V for VCTRL from a motherboard power

supply to provide a nominal 2.5V output. Using

the sense pin allows Kelvin measure the output,

reducing resistance-associated errors.

The SPX1580 can power the 2.5V core voltage

for microprocessors such as a PentiumPCTM,

P55CTM, AMD5k86TM and K6TM and the IBM

PowerPCTM 603EV and 604EV processors.

CURRENT

LIMIT

AMPLIFIER

THERMAL OVERLOAD

VREF

VOLTAGE

REGULATION

AMPLIFIER

S.O.A

LIMIT

SENSE

(4) VCTRL

VIN (5)

VOUT (3)

SENSE (1)

ADJ (2)

PIN DESCRIPTION

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