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
ApplicationNetwork Switches, Routers, Hubs
Hot Plug-In Daughter Cards RAID
Solid-State Circuit Breakers
Power-Supply
Sequencing/Tracking
Base-Station Line Cards
Portable Computer Device
Bays (Docking Stations)Pinout
SpecificationsAll 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°CDescriptionThe 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 provide 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 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 complete, on-chip comparators 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 condition. 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 current 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 package. All devices are specified over the extended -40°C to +85°C temperature range.
MAX5931 Data Sheet
