Description

The FAN5078 DDR memory regulator combines a highefficiency Pulse-Width Modulated (PWM) controller to generate the memory supply voltage, VDDQ, and a linear regulator to generate termination voltage (VTT).

Features

■ PWM regulator for VDDQ (2.5V or 1.8)

■ Linear LDO regulator generates VTT = VDDQ/2, 1.5A Peak sink/source capability

■ AMT / M-state support

■ Control to generate 5V USB

■ ACPI drive and control for 5V DUAL generation

■ 3.3V internal LDO for 3V-ALW generation

■ 300 kHz fixed frequency switching

■ RDS(ON) current sensing or optional current sense resistor for precision over-current detect

■ Internal synchronous boot diode

■ Common Power Good signal for all voltages

■ Input under-voltage lockout (UVLO)

■ Thermal shutdown

■ Latched multi-fault protection

■ Precision reference output for ULDO controllers

■ 24-pin 5 x 5 MLP package

Applications

■ DDR VDDQ and VTT voltage generation with ACPI support

■ Desktop PCs

■ Servers