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FP6321SOG

Synchronous Buck PWM DC-DC Controller

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fitipower integrated technology lnc.

FP6321

Synchronous Buck PWM

DC-DC Controller

Description

The FP6321 is designed to drive two N-channel

MOSFETs in a synchronous rectified buck topology.

It provides the output adjustment, internal soft-start,

frequency compensation networks, monitoring and

protection functions into a single package.

The IC operating at fixed 300kHz frequency provides

simple, single feedback loop, voltage mode control

with fast transient response. The resulting PWM duty

ratio ranges from 0-100%.

The FP6321 features over current protection. The

output current is monitored by sensing the voltage

drop across the RDS-ON of the low side MOSFET

which eliminates the need for a current sensing

resistor.

This device is available in SOP-8 package.

Features

● Operates from +5V or +12V

● Drives Two Low Cost N-Channel MOSFETs

● Fast Transient Response

● Simple Single-Loop Control Design

( Voltage-Mode PWM Control)

● Internal Soft-Start

● Over-Current Fault Monitor

● SOP-8 Package

● RoHS Compliant

Applications

● Motherboard

● Graphic Card

● Telecomm Equipments

● High Power DC-DC Regulators

● Servers

Pin Assignment

SO Package (SOP-8)

Figure 1. Pin Assignment of FP6321

Ordering Information

FP6321□□□

TR: Tape / Reel

P:Green

G:Green

Package Type

SO: SOP-8

FP6321-1.3 -FEB-2010

1

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