MAX34441 MAXIM [Maxim Integrated Products], MAX34441 Datasheet

MAX34441

Manufacturer Part Number

MAX34441

Description

PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller

Manufacturer

MAXIM [Maxim Integrated Products]

Datasheet

1.MAX34441.pdf (53 pages)

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19-5488; Rev 0; 8/10

The MAX34441 is a complex system monitor that can man-

age up to five power supplies and a fan. The power-supply

manager monitors the power-supply output voltage and

constantly checks for user-programmable overvoltage and

undervoltage thresholds. It can also margin the power-

supply output voltage up or down to a user-programma-

ble level. The margining is performed in a closed-loop

arrangement whereby the device automatically adjusts

a pulse-width-modulated (PWM) output and then mea-

sures the resultant output voltage. The power-supply

manager can also sequence the supplies in any order

at both power-up and power-down. With the addition of

an external current-sense amplifier, the device can also

monitor currents.

The device also contains closed-loop fan-speed control.

Based on user-programmable settings for fan-control

PWM duty cycles or RPM speeds at particular tempera-

ture breakpoints, the device automatically adjusts the fan

speed in a manner to reduce audible noise and power

consumption.

PMBus is a trademark of SMIF, Inc.

SMBus is a trademark of Intel Corp.

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.

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

may be simultaneously available through various sales channels. For information about device errata, go to: www.maxim-ic.com/errata.

Network Switches/Routers

Base Stations

Servers

Smart Grid Network Systems

Industrial Controls

PMBus 5-Channel Power-Supply Manager

_______________________________________________________________ Maxim Integrated Products 1

General Description

Applications

and Intelligent Fan Controller

S 5 Channels of Power-Supply Management

S 1 Channel of Fan Control

S Supports Up to Six Temperature Sensors

S PMBus™-Compliant Command Interface

S I

S On-Board Nonvolatile Fault Logging and Default

S No External Clocking Required

S +3.3V Supply Voltage

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

*EP = Exposed pad.

MAX34441ETL+

MAX34441ETL+T

Timeout Function

Configuration Setting

C/SMBus™-Compatible Serial Bus with Bus

Supports 3-Wire and 4-Wire Fans

Automatic Closed-Loop Fan-Speed Control

Support for Dual Tachometer Fans

Fan-Fault Detection

Voltage Measurement/Monitoring

Supports Current Monitoring with External

Automatic Closed-Loop Margining

Programmable Up and Down Sequencing

Power-Good Output

External Thermal Diode Interface with

One Internal Temperature Sensor

Support for Up to Four Additional I

Fault Detection on All Temp Sensors

PART

Automatic Series Resistance Cancellation

Temp Sensor ICs

Differential 12-Bit 1% Accurate ADC

Min/Max Threshold Excursion Detection

Current-Sense Amplifier

-40NC to +85NC

TEMP RANGE

Ordering Information

PIN-PACKAGE

40 TQFN-EP*

Features

C Digital

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