3A 32V Synchronous Rectified Step-Down

Converter

EC3286

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4J23N-Rev.F001

General Description

The EC3286 is a monolithic synchronous buck regulator. The

device integrates two 90mΩ MOSFETs, and provides 3A of

continuous load current over a wide input voltage of 4.75V to

32V. Current mode control provides fast transient response and

cycle-by-cycle current limit.

An adjustable soft-start prevents inrush current at turn-on, and in

shutdown mode the supply current drops to 1µA.The EC3286

regulates the output voltage in automatic PSM/PWM mode

operation, depending on the output current, for high efficiency

operation over light to full load current.

This

device, available in an SOP-8(Exposed PAD) package,

provides a very compact solution with minimal external

components.

Features

●3A Output Current

●Wide 4.75V to 32V Operating Input Range

●Integrated 90mΩ Power MOSFET Switches

●Output Adjustable from 0.923V to 30V

●Up to 93% Efficiency

●Pulse Save Mode(PSM)/PWM Mode Operation

●Programmable Soft-Start

●Stable with Low ESR Ceramic Output Capacitors

●Fixed 340KHz Frequency

●Cycle-by-Cycle Over Current Protection

●Input Under Voltage Lockout

Applications

●Distributed Power Systems

●Networking Systems

●FPGA, DSP, ASIC Power Supplies

●Green Electronics/ Appliances

● Notebook Computers

Package Types

Figure 1. Package Types of EC3286