MAX5906 MAXIM [Maxim Integrated Products], MAX5906 Datasheet

MAX5906

Manufacturer Part Number

MAX5906

Description

Low-Voltage, Dual Hot-Swap Controllers/Power Sequencers

Manufacturer

MAXIM [Maxim Integrated Products]

Datasheet

1.MAX5906.pdf (22 pages)

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The MAX5904–MAX5909 dual hot-swap controllers

provide complete protection for dual-supply systems.

These devices hot swap two supplies ranging from +1V

to +13.2V, provided one supply is at or above 2.7V,

allowing the safe insertion and removal of circuit cards

into live backplanes.

The discharged filter capacitors of the circuit card pro-

vide low impedance to the live backplane. High inrush

currents from the backplane to the circuit card can burn

up connectors and components, or momentarily col-

lapse the backplane power supply leading to a system

reset. The MAX5904 family of hot-swap controllers pre-

vents such problems by gradually ramping up the output

voltage and regulating the current to a preset limit when

the board is plugged in, allowing the system to stabilize

safely. After the startup cycle is completed, two on-chip

comparators provide VariableSpeed/BiLevel™ protec-

tion against short-circuit and overcurrent faults, as well

as immunity against system noise and load transients. In

the event of a fault condition, the load is disconnected.

The MAX5905/MAX5907/MAX5909 must be unlatched

after a fault, and the MAX5904/MAX5906/MAX5908 auto-

matically restart after a fault.

The MAX5904 family offers a variety of options to reduce

component count and design time. All devices integrate

an on-board charge pump to drive the gates of low-cost,

external N-channel MOSFETs. The devices offer integrat-

ed features like startup current regulation and current

glitch protection to eliminate external timing resistors and

capacitors. The MAX5906–MAX5909 provide an open-

drain status output, an adjustable startup timer, an

adjustable current limit, an uncommitted comparator,

and output undervoltage/overvoltage monitoring.

The MAX5904/MAX5905 are available in 8-pin SO pack-

ages. The MAX5906–MAX5909 are available in space-

saving 16-pin QSOP packages.

19-2238; Rev 2; 11/03

VariableSpeed/BiLevel is a trademark of Maxim Integrated

Products, Inc.

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.

Low-Voltage, Dual Hot-Swap Controllers/Power

PCI-Express Applications

Basestation Line Cards

Network Switches or Routers

Solid-State Circuit Breaker

Power-Supply Sequencing

Hot Plug-In Daughter Cards

RAID

________________________________________________________________ Maxim Integrated Products

General Description

Applications

o Safe Hot Swap for +1V to +13.2V Power

o Low 25mV Default Current-Limit Threshold

o Inrush Current Regulated at Startup

o Circuit Breaker Function

o Adjustable Circuit Breaker/Current-Limit

o VariableSpeed/BiLevel Circuit-Breaker Response

o Auto-Retry or Latched Fault Management

o On/Off Sequence Programming

o Status Output Indicates Fault/Safe Condition

o Output Undervoltage and Overvoltage Monitoring

*Contact factory for availability.

Selector Guide and Typical Operating Circuits appear at end

of data sheet.

MAX5904ESA*

MAX5904USA

MAX5905ESA*

MAX5905USA

MAX5906EEE*

MAX5906UEE

MAX5907EEE*

MAX5907UEE

MAX5908EEE*

MAX5908UEE

MAX5909EEE*

MAX5909UEE

Pin Configurations continued at end of data sheet.

Supplies

Threshold

and/or Protection

TOP VIEW

PART

Requires One Input ≥ 2.7V

SENSE1

GATE1

GND

IN1

-40°C to +85°C

TEMP RANGE

0°C to +85°C

Ordering Information

NARROW SO

MAX5904

MAX5905

Pin Configurations

Sequencers

IN2

SENSE2

GATE2

16 QSOP

PIN-PACKAGE

8 SO

Features

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