FAN5068 Description
The FAN5068 DDR memory regulator bines a highefficiency PWM controller to generate the supply voltage, VDDQ, and a linear regulator to generate VTT, the termination voltage. Synchronous rectification provides highefficiency over a wide range of load currents. Efficiency is further enhanced by using the low-side MOSFET’s RDS(ON) to sense current instead of a series sense resistor.
FAN5068 Key Features
- PWM regulator for VDDQ (2.5V or 1.8V)
- Linear LDO regulator generates VTT = VDDQ/2, 1.5A Peak sink/source capability
- 1 independent programable ULDO controllers driving external N-Channel MOSFET
- ACPI drive and control for 5V DUAL generation
- 3.3V Internal LDO for 3V-ALW generation
- 300kHz fixed frequency switching
- RDS(ON) current sensing or optional current sense resistor for precision over-current detect
- Internal Synchronous Boot diode
- Power Good signal for all voltages
- Input Under-Voltage Lock-Out (UVLO)
FAN5068 Applications
- DDR-1/DDR-2 VDDQ and VTT voltage generation with ACPI support