MAX8664 Maxim Integrated Products, MAX8664 Datasheet

MAX8664

Manufacturer Part Number

MAX8664

Description

Step-Down Controller

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX8664.pdf (26 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MAX8664BEEP+

Manufacturer:

Maxim Integrated Products

Quantity:

135

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The MAX8664 dual-output PWM controller is a low-cost,

high-performance solution for systems requiring dual

power supplies. It provides two individual outputs that

operate 180° out-of-phase to minimize input current

ripple, and therefore, capacitance requirements. Built-in

drivers are capable of driving external MOSFETs to

deliver up to 25A output current from each channel.

The MAX8664 operates from a 4.5V to 28V input volt-

age source and generates output voltages from 0.6V

up to 90% of the input voltage on each channel. Total

output regulation error is less than ±0.8% over load,

line, and temperature.

The MAX8664 operates with a constant switching fre-

quency adjustable from 100kHz to 1MHz. Built-in boost

diodes reduce external component count. Digital soft-

start eliminates input inrush current during startup. The

second output has an optional external REFIN2, facili-

tating tracking supply applications. Each output is

capable of sourcing and sinking current, making the

device a great solution for DDR applications.

The MAX8664 employs Maxim’s proprietary peak volt-

age-mode control architecture that provides superior

transient response during either load or line transients.

This architecture is easily stabilized using two resistors

and one capacitor for any type of output capacitors. Fast

transient response requires less output capacitance,

consequently reducing total system cost. The MAX8664B

latches off both controllers during a fault condition, while

the MAX8664A allows one controller to continue to func-

tion when there is a fault in the other controller.

19-0796; Rev 0; 4/07

Pin Configuration appears at end of data sheet.

For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Desktop and Notebook PCs

Graphic Cards

ASIC/CPU/DSP Power Supplies

Set-Top Box Power Supply

Printer Power Supply

Network Power Supply

POL Power Supply

________________________________________________________________ Maxim Integrated Products

Controller with Fast Transient Response

General Description

Low-Cost, Dual-Output, Step-Down

Applications

o ±0.8% Output Accuracy Over Load and Line

o Operates from a Single 4.5V to 28V Supply

o Simple Compensation for Any Type of Output

o Internal 6.5V Regulator for Gate Drive

o Integrated Boost Diodes

o Adjustable Output from 0.6V to 0.9 x V

o Digital Soft-Start Reduces Inrush Current

o 100kHz to 1MHz Adjustable Switching

o 180° Out-of-Phase Operation Reduces Input

o Overcurrent and Overvoltage Protection

o External Reference Input for Second Controller

o Prebiased Startup Operation

Note: This device operates over the -40°C to +85°C operating

temperature range.

+ Denotes lead-free package.

OUT2

MAX8664AEEP+

MAX8664BEEP+

Capacitor

Ripple Current

IN2

PART

Typical Operating Circuit

PIN-

PACKAGE

20 QSOP

ILIM2

DH2

BST2

LX2

DL2

GND

FB2

REFIN2

Ordering Information

MAX8664

OSC/EN12

PWRGD

PGND

ILIM1

BST1

DH1

DL1

LX1

FB1

CODE

E20-1

PKG

Features

Independent

ACTION

FAULT

Joint

IN1

OUT1

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