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MAX5930EEG Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX5930EEG Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 10 page 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 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 Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers ________________________________________________________________ Maxim Integrated Products 1 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 MODE ON3 LIM2 IN2 LIM1 ON1 ON2 POL TOP VIEW SENSE2 GATE2 LIM3 IN3 STAT1 GATE1 SENSE1 IN1 16 15 14 13 9 10 11 12 SENSE3 GATE3 GND BIAS STAT3 LATCH TIM STAT2 QSOP MAX5930 Pin Configurations Ordering Information 19-3032; Rev 0; 10/03 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. 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 VariableSpeed/BiLevel is a trademark of Maxim Integrated Products, Inc. Network 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) *Future product—contact factory for availability. Selector Guide and Typical Operating Circuit appear at end of data sheet. Pin Configurations continued at end of data sheet. |
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