MAX5904 查看數據表（PDF） - Maxim Integrated
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MAX5904 Datasheet PDF : 24 Pages
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19-2238; Rev 3; 9/05
EVAALVUAAILTAIOBNLEKIT
Low-Voltage, Dual Hot-Swap Controllers/Power
Sequencers
General Description
Features
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.
Applications
PCI-Express® Applications
Basestation Line Cards
♦ Safe Hot-Swap for +1V to +13.2V Power
Supplies
Requires One Input ≥ 2.7V
♦ Low 25mV Default Current-Limit Threshold
♦ Inrush Current Regulated at Startup
♦ Circuit Breaker Function
♦ Adjustable Circuit Breaker/Current-Limit
Threshold
♦ VariableSpeed/BiLevel Circuit-Breaker Response
♦ Autoretry or Latched Fault Management
♦ On/Off Sequence Programming
♦ Status Output Indicates Fault/Safe Condition
♦ Output Undervoltage and Overvoltage Monitoring
and/or Protection
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX5904ESA*
MAX5904USA
-40°C to +85°C
0°C to +85°C
8 SO
8 SO
S8-4
S8-4
MAX5905ESA*
MAX5905USA
MAX5906EEE*
-40°C to +85°C
0°C to +85°C
-40°C to +85°C
8 SO
8 SO
16 QSOP
S8-4
S8-4
E16-1
MAX5906UEE
MAX5907EEE*
0°C to +85°C
-40°C to +85°C
16 QSOP
16 QSOP
E16-1
E16-1
MAX5907UEE
MAX5908EEE*
0°C to +85°C
-40°C to +85°C
16 QSOP
16 QSOP
E16-1
E16-1
MAX5908UEE
0°C to +85°C 16 QSOP
E16-1
MAX5909EEE* -40°C to +85°C 16 QSOP
E16-1
MAX5909UEE
0°C to +85°C 16 QSOP
E16-1
*Contact factory for availability.
Pin Configurations
TOP VIEW
Network Switches or Routers
IN1 1
8 IN2
Solid-State Circuit Breaker
Power-Supply Sequencing
SENSE1 2
GATE1 3
MAX5904
MAX5905
7 SENSE2
6 GATE2
Hot Plug-In Daughter Cards
GND 4
5 ON
RAID
VariableSpeed/BiLevel is a trademark of Maxim Integrated
Products, Inc.
NARROW SO
Pin Configurations continued at end of data sheet.
PCI-Express is a registered trademark of PCI-SIG Corp.
Selector Guide and Typical Operating Circuits appear at end
of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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.
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