DESCRIPTION
The LT=AE1580 is a 7A low dropout regulator designed to power the new
generation of microprocessors. The dropout voltage of this device is
100mV at light loads rising to just 540mV at 7A. To achieve this
dropout, a second low current input voltage 1V greater than the output
voltage, is required. The device can also be used as a single supply
device 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 virtually eliminates output
voltage variations due to load changes. Typical load regulation,
measured at the SENSE pin, for a load current step of 100mA to 7A is
less than 1mV.
The LT1580 has fast transient response, equal to the LT1584. On fixed
voltage devices, the ADJ pin is brought out. A small capacitor on the
ADJ pin further improves transient response.
This device is ideal for generating processor supplies of 2V to 3V on
motherboards where both 5V and 3.3V supplies are available.
