www.DataSheet4U.com
FAN5078 DDR/ACPI Regulator Combo
May 2006
FAN5078 DDR/ACPI Regulator Combo
Features ...
www.DataSheet4U.com
FAN5078 DDR/ACPI Regulator Combo
May 2006
FAN5078 DDR/ACPI Regulator Combo
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
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). Synchronous rectification provides high efficiency over a wide range of load currents. Efficiency is further enhanced by using the low-side
MOSFET’s RDS(ON) to sense current. The VDDQ PWM regulator is a sampled current mode control with external compensation to achieve fast load-transient response and provide system design optimization. The VTT regulator derives its reference and takes its power from the VDDQ PWM regulator, output. The VTT termination regulator is capable of sourcing or sinking 1.5A peak currents. In S5 M1 mode, the...