General Description

The EC1457 is a current mode monolithic buck switching regulator.

Operating with an input range of 4.5­40V, the EC1457 delivers 3A of continuous output current with an integrated high side N­Channel MOSFET. At light loads, EC1457 operates in low frequency to maintain high efficiency and low output voltage ripple.

Current mode control provides tight load transient response and cycle­by­cycle current limiting.

The EC1457 guarantees robustness with input under­voltage lockout, start­up current run­away protection, output short protection, feedback short protection and thermal protection.

The EC1457 is available in 8­pin ESOP package.

Features

◆4.5V to 40V operating input range 3A output current
◆ Up to 94% efficiency
◆ High efficiency (>78%) at light load
◆Internal Soft­Start
◆Adjustable switch frequency from 100kHz to 900kHz
◆Input under­voltage lockout
◆ Start­up current run­away protection
◆Output short protection
◆Feedback short protection
◆ Thermal protection
◆ Available in ESOP8 package

Applications

◆Distributed Power Systems
◆Networking Systems
◆FPGA, DSP, ASIC Power Supplies
◆Green Electronics/ Appliances
◆Notebook Computers