Industry's Most Complete Portfolio of DDR Power Solutions

For memory supply (V_DDQ), termination (V_TT), Linear, or PWM, Fairchild has it all.

A pioneer in DDR power management, Fairchild offered the first power management solution for DDR in 1999. Since then, Fairchild has expanded its portfolio of DDR power solutions to meet every computing need—from desktops to notebooks. Fairchild's family of DDR memory products offers the industry's widest choice of power and interface solutions created specifically for the fast-growing DDR memory market.

DDR, (Double Data Rate) memory requires a power supply for the memory itself (V_DDQ) as well as a "V_TT" power supply at 50% of V_DDQ for terminating the data, address, and control lines. For more information on DDR memory, please refer to DDR SDRAM Signaling Design Notes (PDF).

Fairchild's DDR Solutions Lineup

VDDQ and VTT Combos These dual PWM controllers provide a complete solution for generating DDR memory power supply (VDDQ) and termination (VTT) at any power level.

VTT Linear Solutions These low-dropout regulators provide a low-cost solution for SDRAM termination voltage (VTT).

Integrated PWM VTT Solutions Where efficiency and size count, these integrated high frequency PWMs generate the termination voltage from VDDQ.

VDDQ Solutions This group of PWM regulators and high current LDOs are ideal for generating the SDRAM power supply (VDDQ).

 

VDDQ and VTT Combos
FAN5068 Industry's most highly-integrated solution for DDR memory + ACPI •  Provides DDR-1/DDR-2 supply voltage, VDDQ and VTT termination voltage and generation, plus ACPI support •  -10°C to 85°C operating temperature range •  Small footprint MLP-24 5x5mm package Applications: •  DDR-1/DDR-2 VDDQ and VTT voltage generation with ACPI support •  Desktop PCs •  Notebooks •  Servers	[top]
FAN5236 Complete DDR memory power solution •  VTT Tracks VDDQ/2 •  VDDQ/2 Buffered Reference Output •  Wide input voltage range: 3.3 to 24V •  Supports DDR1 and DDR2 •  TSSOP-28 or QSOP-28 packages Applications: •  Notebook PCs •  Desktop PCs •  Servers •  VGA Cards	[top]
Integrated PWM for VTT
FAN6555 Integrated PWM VTT regulator •  Efficient stand-alone PWM solution •  3A continuous current •  VDDQ/2 Buffered Reference Output •  Supports DDR1 and DDR2 •  PSOP-16 or low-cost SO-16 (FAN6555) package Applications: •  Notebook PCs •  Desktop PCs •  VGA Cards	[top]
VDDQ PWM Solutions
FAN5234 Mobile friendly PWM Regulator •  High Efficiency •  Minimal external component count •  300Khz fixed frequency operation •  Supports DDR1 and DDR2 •  TSSOP / QSOP package Applications: •  Notebook PCs •  Desktop PCs •  VGA Cards •  Set-top Boxes	[top]
VDDQ Low-Dropout Linear Regulator (LDO) Solutions
FAN1582 / FAN1581 3A/5A Ultra-Low Drop-out regulator •  Very low drop-out voltage •  1% regulation •  Fixed 2.5, 1.5 and adjustable •  Supports DDR1 and DDR2 •  TO-263 and MLP packages Applications: •  Desktop PCs •  VGA Cards •  Set-top Boxes	[top]