LFC789D25CPWRG4 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.
LFC789D25CPWRG4 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
