LFC789D25CPWRE4 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 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.
LFC789D25CPWRE4 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
LFC789D25CPWRE4 Applications
? Automotive chargers, Converters, High Voltage Auxiliaries
? Inverters, PFC, UPS
