DESCRIPTION

The NX2423 is a two-phase PWM controller with integrated FET driver designed for low voltage high current application. The two phase synchronous buck converter offers ripple cancelation for both input and output. The NX2423 uses differential remote sensing using either current sense resistor or inductor DCR sensing to achieve accurate current matching between the two channels.

Differential sensing eliminates the error caused by PCB board trace resistance that otherwise presents when us ing a single ended voltage sensing.

FEATURES

Differential inductor DCR sensing eliminates the problem with layout parasitic

5V bias regulator available

Low Impedance On-board Drivers

Hiccup current limit and IOUT indication

Power Good for power sequencing

EN2_B pin allows the slave channel on and off while the master channel is working

Programmable frequency

Prebias start up

OVP without negative spike at output

Selectable between internal and external reference

Internal Schottky diode from PVCC to BST

Pb-free and RoHS compliant

APPLICATIONS

Graphic card High Current Vcore Supply

High Current on board DC to DC converter applications