MAX5930 Datasheet, PDF (1/23 Pages) Maxim Integrated Products – Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers

19-3032; Rev 0; 10/03
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 (V_{IN_}) ≥ 2.7V and Only One
V_{IN_} > 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
TEMP RANGE
PIN-PACKAGE
MAX5930EEG
-40°C to +85°C
24 QSOP
MAX5931LEEP*
-40°C to +85°C
20 QSOP
MAX5931HEEP*
-40°C to +85°C
20 QSOP
*Future product—contact factory for availability.
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.