NX4108 - NEXSEM

NX4108 1A SYNCHRONOUS BUCK SWITCHER

The NX4108 is a current mode PWM buck switcher with n internal compensation, can provides up to 1A output n current with FET on board. It operates from 2.7V to 5.5V n and output as low as 0.6V which is ideal for the applica- n tion with single cell Li-Ion battery as well as other 3.3V n input bus supply applications. Switching frequency is fixed 1MHz, sma.

Features

SOT23-5L package Internal Digital Soft Start Internally-compensated Current mode controller <1uA shut-down current Peak Current Limit with HICCUP feature and Over temperature protection Prebias start up Operation Enable available Fixed 1.2V, 1.5V, 1.8V versions and adjustable versions are available 100% duty ratio operation capability Pb-free and RoHS compliant APPLICATIONS n Li-Ion battery operated portable system n Cellular Phones n Portable applications n USB Devices TYPICAL APPLICATION 1 EN 5 FB NX4108 VIN 4 4.7uF(X5R,10V) VIN=5V SW 3 2.2uH 2 GND 10uF (X5R,10V) Vout=2.5V 332k 1.