MAX5927A/MAX5929AMAX5929D 19-4087 Rev 0 5/08 Low-Voltage, Quad, Hot-Swap Controllers/Power Sequencers General Description Features Safe Hot Swap for +1V to +15V Power Supplies The MAX5927A/MAX5929AMAX5929D +1V to +15V quad hot-swap controllers provide complete protection with Any Input Voltage (V 2.7V) IN for multisupply systems. They allow the safe insertion Adjustable Circuit-Breaker/Current-Limit and removal of circuit cards into live backplanes. These Threshold from 25mV to 100mV devices hot swap multiple supplies ranging from +1V to Configurable Tracking, Sequencing, or +15V, provided one supply is at or above +2.7V. The Independent Operation Modes input voltage rails (channels) can be configured to VariableSpeed/BiLevel Circuit-Breaker Response sequentially turn-on/off, track each other, or have com- pletely independent operation. Internal Charge Pumps Generate n-Channel MOSFET Gate Drives The discharged filter capacitors of the circuit card provide low impedance to the live backplane. High inrush currents Inrush Current Regulated at Startup from the backplane to the circuit card can burn up connec- Autoretry or Latched Fault Management tors and components, or momentarily collapse the back- Programmable Undervoltage Lockout plane power supply leading to a system reset. The MAX5927A/MAX5929AMAX5929D hot-swap controllers Status Outputs Indicate Fault/Safe Condition prevent such problems by gradually ramping up the output voltage and regulating the current to a preset limit when the Ordering Information board is plugged in, allowing the system to stabilize safely. PART TEMP RANGE PIN-PACKAGE After the startup cycle is complete, on-chip comparators provide VariableSpeed/BiLevel protection against short- MAX5927AETJ+ -40C to +85C 32 Thin QFN-EP* circuit and overcurrent faults, and provide immunity against MAX5929AEEG+ -40C to +85C 24 QSOP system noise and load transients. The load is disconnected MAX5929BEEG+ -40C to +85C 24 QSOP in the event of a fault condition. The MAX5929C/ MAX5929CEEG+ -40C to +85C 24 QSOP MAX5929D automatically restart after a fault condition, while the MAX5929A/MAX5929B must be unlatched. The MAX5929DEEG+ -40C to +85C 24 QSOP MAX5927A fault management mode is selectable. *EP = Exposed pad. The MAX5927A/MAX5929AMAX5929D offer a variety of +Denotes a lead-free/RoHS-compliant package. options to reduce external component count and design Selector Guide and Typical Operating Circuit appear at end time. All devices integrate an on-board charge pump to of data sheet. drive the gates of low-cost external n-channel MOSFETs, an adjustable startup timer, and an adjustable current Pin Configurations limit. The devices offer integrated features like startup current regulation and current glitch protection to elimi- nate external timing resistors and capacitors. The TOP VIEW MAX5929B/MAX5929D provide an open-drain, active-low + status output for each channel, the MAX5929A/ MAX5929C provide an open-drain, active-high status out- IN1 1 24 IN2 put for each channel, and the MAX5927A status output SENSE1 2 23 SENSE2 polarity is selectable. GATE1 3 22 GATE2 The MAX5927A is available in a 32-pin thin QFN package LIM4 4 21 LIM3 and the MAX5929AMAX5929D are available in a 24-pin MAX5927A IN4 5 20 N.C. QSOP package. All devices are specified over the -40C SENSE4 6 19 IN3 to +85C extended temperature range. GATE4 7 18 SENSE3 Applications STAT1 17 GATE3 8 PCI Express Hot Plug Basestation Line Cards Hot Plug-In Daughter Cards Portable Computer Device Bays (Docking Stations) RAID Network Switches, Routers, Power-Supply Hubs Sequencing/Tracking THIN QFN VariableSpeed/BiLevel is a trademark of Maxim Integrated Pin Configurations continued at end of data sheet. Products, Inc. PCI Express is a registered trademark of PCI-SIG Corp. trademark Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. STAT2 9 32 LIM1 TIM 10 31 ON1 N.C. 11 30 ON2 LATCH 12 29 POL STAT3 13 28 MODE STAT4 14 27 ON3 BIAS 15 26 ON4 GND 16 25 LIM2Low-Voltage, Quad, Hot-Swap Controllers/Power Sequencers AABBSSOOLLUUTTEE MMAAXXIIMMUUMM RRAATTIINNGGSS (All voltages referenced to GND, unless otherwise noted.) Continuous Power Dissipation (T = +70C) A IN ..........................................................................-0.3V to +16V 24-Pin QSOP (derate 9.5mW/C above +70C)............762mW GATE .............................................................-0.3V to (IN + 6V) 32-Pin Thin QFN (derate 21.3mW/C above +70C) ..1702mW BIAS (Note 1) .............................................. (V - 0.3V) to +16V Operating Temperature Range ...........................-40C to +85C IN ON , STAT , LIM (MAX5927A), TIM, MODE, Junction Temperature .....................................................+150C LATCH (MAX5927A), POL (MAX5927A) Storage Temperature Range .............................-65C to +150C (Note 1).....................................................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C IN SENSE ........................................................-0.3V to (IN + 0.3V) Current into Any Pin..........................................................50mA Note 1: V is the largest of V , V , V , and V . IN IN1 IN2 IN3 IN4 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 (V = +1V to +15V provided at least one supply is larger than or equal to +2.7V, T = -40C to +85C, unless otherwise noted. IN A Typical values are at V = 12.0V, V = 5.0V, V = 3.3V, V = 1.0V, V = +3.3V, and T = +25C.) (Notes 1, 2) IN1 IN2 IN3 IN4 ON A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLIES IN Input Voltage Range V At least one V 1.0 15 V IN IN I + I + I + I , V = 2.7V, IN1 IN2 IN3 IN4 ON Supply Current I 2.5 5 mA Q V = +15V, after STAT asserts IN CURRENT CONTROL LIM = GND, MAX5927A/ 22.5 25 28 MAX5929AMAX5929D (Note 4) Slow-Comparator Threshold R = 10k (MAX5927A) 80 125 LIM (V - V ) V mV IN SENSE SC,TH (Note 3) R x 7.5 x LIM R from LIM to GND (MAX5927A) LIM -6 10 + 25mV 1mV overdrive 3 ms Slow-Comparator Response Time t SCD (Note 4) 50mV overdrive 130 s Fast-Comparator Threshold 2 x V mV FC,TH (V - V ) V IN SENSE SC,TH Fast-Comparator Response Time t 10mV overdrive, from overload condition 200 ns FCD SENSE Input Bias Current I V = V 0.03 1 A B SENSE SENSE IN 2 MAX5927A/MAX5929AMAX5929D