Sequencers/Voltage Trackers. MAX5931 Datasheet

MAX5931 Trackers. Datasheet pdf. Equivalent


Part MAX5931
Description Hot-Swap Controllers/ Power Sequencers/Voltage Trackers
Feature 19-3032; Rev 2; 3/04 MAX5930/MAX5931 Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/V.
Manufacture Maxim Integrated
Datasheet
Download MAX5931 Datasheet

19-3032; Rev 2; 3/04 MAX5930/MAX5931 Low-Voltage, Triple, MAX5931 Datasheet
Recommendation Recommendation Datasheet MAX5931 Datasheet




MAX5931
19-3032; Rev 2; 3/04
Low-Voltage, Triple, Hot-Swap Controllers/
Power Sequencers/Voltage Trackers
General Description
The MAX5930/MAX5931 +1V to +13.2V triple hot-swap
controllers provide complete protection for multisupply
systems. They allow the safe insertion and removal of
circuit cards into live backplanes. These devices hot
swap multiple supplies ranging from +1V to +13.2V,
provided one supply is at or above +2.7V and only one
supply is above 11V. The input voltage rails (channels)
can be configured to sequentially turn-on/off, track
each other, or have completely independent operation.
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 collapse
the backplane power supply leading to a system reset.
The MAX5930/MAX5931 hot-swap controllers prevent
such problems by gradually ramping up the output volt-
age 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 complete, on-chip com-
parators provide VariableSpeed/BiLevel™ protection
against short-circuit and overcurrent faults, and provide
immunity against system noise and load transients.
The load is disconnected in the event of a fault condi-
tion. The MAX5930/MAX5931 fault-management mode
is selectable, allowing latched fault or autoretry after a
fault condition.
The MAX5930/MAX5931 offer a variety of options to
reduce external component count and design time. All
devices integrate an on-board charge pump to drive
the gates of low-cost, external N-channel MOSFETs, an
adjustable startup timer, and an adjustable current limit.
The devices offer integrated features like startup cur-
rent regulation and current glitch protection to eliminate
external timing resistors and capacitors. The
MAX5931L provides an open-drain, active-low status
output for each channel, the MAX5931H provides an
open-drain, active-high status output for each channel,
and the MAX5930 status output polarity is selectable.
The MAX5930 is available in a 24-pin QSOP package,
and the MAX5931 is available in a 20-pin QSOP pack-
age. All devices are specified over the extended -40°C
to +85°C temperature range.
Applications
Network Switches, Routers, Power-Supply
Hubs
Sequencing/Tracking
Hot Plug-In Daughter Cards Base-Station Line Cards
RAID
Portable Computer Device
Solid-State Circuit Breakers Bays (Docking Stations)
Features
Safe Hot Swap for +1V to +13.2V Power Supplies
with Any Input Voltage (VIN_) 2.7V and Only One
VIN_ > 11.0V
Adjustable Circuit Breaker/Current-Limit
Threshold from 25mV to 100mV
Configurable Tracking, Sequencing, or
Independent Operation Modes
VariableSpeed/BiLevel Circuit-Breaker Response
Internal Charge Pumps Generate N-Channel
MOSFET Gate Drives
Inrush Current Regulated at Startup
Autoretry or Latched Fault Management
Programmable Undervoltage Lockout
Status Outputs Indicate Fault/Safe Condition
Ordering Information
PART
MAX5930EEG
MAX5931LEEP
MAX5931HEEP
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
24 QSOP
20 QSOP
20 QSOP
Selector Guide and Typical Operating Circuit appear at end
of data sheet.
Pin Configurations
TOP VIEW
POL 1
ON2 2
ON1 3
LIM1 4
IN1 5
SENSE1 6
GATE1 7
STAT1 8
STAT2 9
TIM 10
LATCH 11
STAT3 12
MAX5930
24 MODE
23 ON3
22 LIM2
21 IN2
20 SENSE2
19 GATE2
18 LIM3
17 IN3
16 SENSE3
15 GATE3
14 GND
13 BIAS
QSOP
Pin Configurations continued at end of data sheet.
VariableSpeed/BiLevel is a trademark of Maxim Integrated
Products, Inc.
________________________________________________________________ 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.



MAX5931
Low-Voltage, Triple, Hot-Swap Controllers/
Power Sequencers/Voltage Trackers
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND, unless otherwise noted.)
IN_ ..........................................................................-0.3V to +14V
GATE_.............................................................-0.3V to (IN_ + 6V)
BIAS (Note 1) .............................................. (VIN - 0.3V) to +14V
ON_, STAT_, LIM_ (MAX5930), TIM, MODE,
LATCH, POL (MAX5930) ..........................-0.3V to (VIN + 0.3V)
SENSE_........................................................-0.3V to (IN_ + 0.3V)
Current into Any Pin..........................................................±50mA
Continuous Power Dissipation (TA = +70°C)
20-Pin QSOP (derate 9.1mW/°C above +70°C)............727mW
24-Pin QSOP (derate 9.5mW/°C above +70°C)............762mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: VIN is the largest of VIN1, VIN2, and VIN3.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN_ = +1V to +13.2V provided at least one supply is larger than or equal to +2.7V and only one supply is > 11.0V, TA = -40°C to +85°C,
unless otherwise noted. Typical values are at VIN1 = 12.0V, VIN2 = 5.0V, VIN3 = 3.3V, VON_ = +3.3V, and TA = +25°C.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
POWER SUPPLIES
IN_ Input Voltage Range
VIN_
At least one VIN_ +2.7V and only one
VIN_ > 11.0V
1.0
13.2 V
Supply Current
IQ
IIN1 + IIN2 + IIN3, VON_ = 2.7V,
VIN_ = +13.2V, after STAT_ high
2.5 5 mA
CURRENT CONTROL
Slow-Comparator Threshold
(VIN_ - VSENSE_)
(Note 3)
VSC,TH
LIM_ = GND
(MAX5930),
MAX5931
(Note 4)
TA = +25°C
TA = -40°C to +85°C
RLIM_ = 10k(MAX5930)
RLIM_ from LIM_ to GND (MAX5930)
Slow-Comparator Response Time
(Note 4)
Fast-Comparator Threshold
(VIN_ - VSENSE_)
Fast-Comparator Response Time
SENSE_ Input Bias Current
MOSFET DRIVER
Startup Period (Note 5)
tSCD
VFC,TH
tFCD
IB SENSE_
tSTART
1mV overdrive
50mV overdrive
10mV overdrive, from overload condition
VSENSE_ = VIN_
RTIM = 100k
RTIM = 4k(minimum value)
TIM floating (default)
22.5 25 27.5
21.0 27.5
80 125
RLIM_ x 7.5 x
10-6 + 25mV
3
130
2x
VSC,TH
200
0.03 1
8.0
0.30
5
10.8
0.4
9
13.6
0.55
14
mV
ms
µs
mV
ns
µA
ms
2 _______________________________________________________________________________________





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