MAX8686 Maxim Integrated Products, MAX8686 Datasheet

MAX8686

Manufacturer Part Number

MAX8686

Description

DC-DC Converter Delivers Up To 25A Per Phase

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX8686.pdf (22 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MAX8686ETL+T

Manufacturer:

MAIXM

Quantity:

3 636

Company:

H&T Electronics

Part Number:

MAX8686ETL+T

Quantity:

8 600

Current page: 1 of 22
Download datasheet (440Kb)

www.DataSheet4U.com

The MAX8686 current-mode, synchronous PWM step-

down regulator with integrated MOSFETs operates from

a 4.5V to 20V input supply and generates an adjustable

output voltage from 0.7V to 5.5V while delivering up to

25A per phase.

The MAX8686 employs a peak current-mode architec-

ture that operates with an adjustable switching frequency

from 300kHz to 1MHz. An adjustable current-limit thresh-

old allows for optimization for different applications with

different load currents. Inductor current sense is

achieved either using an external sense resistor or using

a lossless inductor current-sense scheme. The foldback

and hiccup current limit reduces the power dissipation

during overload or short-circuit conditions and allows for

autorecovery when the fault condition is removed.

The MAX8686 offers the ability to start up monotonically

even when there is a prebias output voltage. In addi-

tion, an adjustable soft-start capability allows for a con-

trolled turn-on. The MAX8686 features an accurate 1%

reference and offers a reference input that allows for a

higher accuracy reference to be used for voltage track-

ing applications such as DDR memory.

The MAX8686 can be paralleled (up to eight) together

in a true multiphase mode to deliver up to 200A of out-

put current. When operating in this mode, this device

achieves better than 10% current balance between

phases at full load. The MAX8686 supports program-

mable phase shedding to improve system efficiency

during light load conditions.

Other features include an enable input and a power-OK

(POK) indicator used for power sequencing. The

MAX8686 also features latch overvoltage protection

that turns on the low-side MOSFET when the output

voltage exceeds 120% of the nominal voltage. The

MAX8686 is offered in a thermally enhanced 40-pin,

6mm x 6mm TQFN package.

19-4113; Rev 0; 5/08

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.

DC-DC Converter Delivers Up to 25A Per Phase

POL Power Supplies

Module Replacements

Telecom Equipment

Networking Equipment

Servers

DDR Memory

________________________________________________________________ Maxim Integrated Products

General Description

Applications

Single/Multiphase, Step-Down,

♦ Operating Range from 4.5V to 20V Input Supply

♦ 1% Reference Voltage Accuracy Over Temperature

♦ Reference Input (REFIN) for Output Tracking or

♦ Adjustable Switching Frequency from 300kHz

♦ Single/Multiphase Operation Delivers Up to

♦ Adjustable Current Limit

♦ Monotonic Output Voltage at Startup (Prebias)

♦ Output Sink and Source Current Capability

♦ Adjustable Soft-Start

♦ Thermal-Overload Protection

♦ Output Overvoltage Protection

♦ Thermally Enhanced 6mm x 6mm TQFN

+ Denotes a lead-free package.

* EP = Exposed pad.

ENABLE

INPUT

System Reference Voltage

to 1MHz

25A/200A with Integrated MOSFETs

Package (4W)

MAX8686ETL+

PART

= 12V

Typical Application Circuit

PGND

PHASE/REFO

COMP

EN/SLOPE

REFIN

FREQ

SS GND

Ordering Information

-40°C to +85°C

MAX8686

TEMP RANGE

ILIM

POK

BST

RS+

CS+

CS-

RS-

Features

PIN-PACKAGE

40 TQFN-EP*

OUT

POK

OUTPUT

= 1.2V/25A

Related parts for MAX8686

Related keywords

MAX8686 datasheet
MAX8686 data sheet
MAX8686 pdf datasheet
MAX8686 component
MAX8686 part
MAX8686 distributor
MAX8686 RoHS
MAX8686 datasheet download