LFC789D25CDR Description

The LFC789D25 is a dual linear FET controller that simplifies the design of dual power supplies. The device consists of two independent controllers, each of which drives an external MOSFET to implement a low-dropout regulator. One controller is programmed to regulate a fixed 2.5-V output, while the second controller can be programmed to regulate any desired output voltage via a reference input pin, allowing for the creation of a tracking regulator often needed for termination schemes. And, because the heating effects of the external FETs easily can be isolated from the controllers, the controllers can regulate the output voltages to a maximum tolerance of ±2% across temperature and load.

LFC789D25CDR Features

Two Independent Controllers for

Regulation of:

? Fixed 2.5-V and an Adjustable Output

? ±2% (Max) Regulation Across

Temperature and Load (1 mA to 3 A)

Adjustable Output Can Be Set Via an

External Reference Pin, Allowing for the

Creation of a Tracking Regulator

Great Design Flexibility With Minimal

External Components

Applications: High-Current, Low-Dropout

Regulators for:

? DDR/RDRAM Memory Termination

? Motherboards

? Chipset I/O

? GTLP Termination