LT1580IR-2.5#TRPBF

LT1580IR-2.5#TRPBF FEATURES

Dual Supply Mode

LT1580IR-2.5#TRPBF DESCRIPTIONU

The LT ®1580 is a 7A low dropout regulator designed topower the new generation of microprocessors. The drop-out voltage of this device is 100mV at light loads rising tojust 540mV at 7A. To achieve this dropout, a second lowcurrent input voltage 1V greater than the output voltage, isrequired. The device can also be used as a single supplydevice where dropout is comparable to an LT1584.Several other new features have been added to the LT1580.A remote SENSE pin is brought out. This feature virtuallyeliminates output voltage variations due to load changes.Typical load regulation, measured at the SENSE pin, for aload current step of 100mA to 7A is less than 1mV.The LT1580 has fast transient response, equal to theLT1584. On fixed voltage devices, the ADJ pin is broughtout. A small capacitor on the ADJ pin further improvestransient response.This device is ideal for generating processor supplies of2V to 3V on motherboards where both 5V and 3.3Vsupplies are available.Dropout Voltage —Minimum Power Voltage

LT1580IR-2.5#TRPBF APPLICATIONSU

at 90MHz to 166MHz and Beyond