NX2155H - Microsemi

NX2155H Single Power Supply Synchronous PWM Controller

The NX2155H controller IC is a single input supply synchronous Buck controller IC designed for step down DC to DC converter applications. The NX2155H is optimized to convert bus voltages from 8V to 22V to output as low as 0.8V voltage. An internal regulator converts the bus voltage to 5V, which provides voltage supply to internal logic and driver circuits. T.

Features

of the device are: Internal Schottky diode, thermal shutdown, 5V gate drive, adaptive deadband control, internal digital soft start, 5VREG undervoltage lock out and Shutdown capability via the comp pin. Features
 Single Supply Voltage from 8V to 22V
 Internal 5V Regulator
 Programmable Operational Frequency of 2MHz
 Internal Digital Soft Start Function
 Less than 50nS Adaptive Deadband
 Current Limit Triggers Hiccup by Sensing RDSON of Synchronous MOSFET
 Pb- Applications
 LCD TV
 Graphic Card on Board Converters
 Memory Vddq Supply in Mother board Applications
 On board DC to DC s.