Rainbow-electronics MAX5066 Manual de usuario descargar pdf

General Description

The MAX5066 is a two-phase, configurable single- or

dual-output buck controller with an input voltage range of

4.75V to 5.5V or from 5V to 28V. Each phase of the

MAX5066 is designed for 180° operation. A mode pin

allows for a dual-output supply or connecting two phases

together for a single-output, high-current supply. Each

output channel of the MAX5066 drives n-channel

MOSFETs and is capable of providing more than 25A of

load current. The MAX5066 uses average current-mode

control with a switching frequency up to 1MHz per phase

where each phase is 180° out of phase with respect to

the other. Out-of-phase operation results in significantly

reduced input capacitor ripple current and output volt-

age ripple in dual-phase, single-output voltage applica-

tions. Each buck regulator output has its own high-

performance current and voltage-error amplifier that can

be compensated for optimum output filter L-C values and

transient response.

The device’s switching frequency can be programmed

from 100kHz to 1MHz with an external resistor. The

MAX5066 can be synchronized to an external clock. Each

output voltage is adjustable from 0.61V to 5.5V. Additional

features include thermal shutdown, “hiccup mode” short-

circuit protection. Use the MAX5066 with adaptive voltage

positioning for applications that require a fast transient

response, or accurate output voltage regulation.

The MAX5066 is available in a thermally enhanced 28-pin

TSSOP package capable of dissipating 1.9W. The device

is rated for operation over the -40°C to +85°C extended,

or -40°C to +125°C automotive temperature range.

Applications

High-End Desktop Computers

Graphics Cards

Networking Systems

Point-of-Load High-Current/High-Density

Telecom DC-DC Regulators

RAID Systems

Features

♦ 4.75V to 5.5V or 5V to 28V Input

♦ Dual-Output Synchronous Buck Controller

♦ Configurable for Two Separate Outputs or One

Single Output

♦ Each Output is Capable of Up to 25A Output

Current

♦ Average Current-Mode Control Provides Accurate

Current Limit

♦ 180° Interleaved Operation Reduces Size of Input

Filter Capacitors

♦ Limits Reverse Current Sinking When Operated in

Parallel Mode

♦ Each Output is Adjustable from 0.61V to 5.5V

♦ Independently Programmable Adaptive Voltage

Positioning

♦ 100kHz to 1MHz per Phase Programmable

Switching Frequency

♦ Oscillator Frequency Synchronization from

200kHz to 2MHz

♦ Hiccup Mode Overcurrent Protection

♦ Overtemperature Shutdown

♦ Thermally Enhanced 28-Pin TSSOP Package

Capable of Dissipating 1.9W

♦ Operates Over -40°C to +85°C or -40°C to +125°C

Temperature Range

MAX5066

Configurable, Single-/Dual-Output, Synchronous

Buck Controller for High-Current Applications

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3661; Rev 0; 5/05

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART TEMP RANGE PIN-PACKAGE

MAX5066EUI -40

C to +85

C 28 TSSOP

MAX5066AUI -40°C to +125°C 28 TSSOP

1 2 3 4 5 6 ... 21 22

Indice de contenidos

Pagina 1 - Ordering Information

General DescriptionThe MAX5066 is a two-phase, configurable single- ordual-output buck controller with an input voltage range of4.75V to 5.5V or from

Pagina 2 - ELECTRICAL CHARACTERISTICS

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications10 _________________________________________________

Pagina 3

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications____________________________________________________

Pagina 4

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications12 _________________________________________________

Pagina 5

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications____________________________________________________

Pagina 6

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications14 _________________________________________________

Pagina 7 - MAX5066 toc17

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications____________________________________________________

Pagina 8

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications16 _________________________________________________

Pagina 9 - Pin Description (continued)

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications____________________________________________________

Pagina 10 - Figure 1. Block Diagram

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications18 _________________________________________________

Pagina 11

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications____________________________________________________

Pagina 12 - Control Loop

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications2 __________________________________________________

Pagina 13

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications20 _________________________________________________

Pagina 14 - VOLTAGE-POSITIONING WINDOW

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications____________________________________________________

Pagina 15

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current ApplicationsMaxim cannot assume responsibility for use of any ci

Pagina 16

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications____________________________________________________

Pagina 17 - Design Procedures

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications4 __________________________________________________

Pagina 18 - Output Capacitors

OSCILLATOR FREQUENCY vs. RTMAX5066 toc01RT (kΩ)OSCILLATOR FREQUENCY (kHz)900800700600500400300200100100100010,0001001000CDH = CDL = 0SUPPLY CURRENTvs.

Pagina 19 - Reverse Current Limit

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications6 __________________________________________________

Pagina 20 - Compensation

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications____________________________________________________

Pagina 21 - Chip Information

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications8 __________________________________________________

Pagina 22 - Package Information

MAX5066Configurable, Single-/Dual-Output, SynchronousBuck Controller for High-Current Applications____________________________________________________

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