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PMBus 6-Channel Power-Supply Manager

19-5527; Rev 0; 9/10

Ordering Information

General Description

The MAX34440 is a complex system monitor that can

manage up to six power supplies. 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-

programmable level. The margining is performed in a

closed-loop arrangement whereby the device automati-

cally adjusts a pulse-width-modulated (PWM) output and

then measures 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 addi-

tion of an external current-sense amplifier, the device

can also monitor currents.

Applications

Network Switches/Routers

Base Stations

Servers

Smart Grid Network Systems

Industrial Controls

Features

S

6 Channels of Power-Supply Management

Voltage Measurement/Monitoring

Differential 12-Bit 1% Accurate ADC

Min/Max Threshold Excursion Detection

Supports Current Monitoring with External

Current-Sense Amplifier

Automatic Closed-Loop Margining

Programmable Up and Down Sequencing

Power-Good Output

S

Supports Up to Eight Temperature Sensors

Two Remote Diode Temperature Sensors

Five Local Temperature Sensors

One Internal Temperature Sensor

Fault Detection on All Temp Sensors

S

PMBus™-Compliant Command Interface

S

Timeout Function

S

On-Board Nonvolatile Fault Logging and Default

Configuration Setting

S

No External Clocking Required

S

+3.3V Supply Voltage

PMBus is a trademark of SMIF, Inc.

SMBus is a trademark of Intel Corp.

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

T = Tape and reel.

*EP = Exposed pad.

PART

TEMP RANGE

PIN-PACKAGE

MAX34440ETL+

-40NC to +85NC

40 TQFN-EP*

MAX34440ETL+T

-40NC to +85NC

40 TQFN-EP*

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