MAX5904MAX5909 19-2238 Rev 3 9/05 Low-Voltage, Dual Hot-Swap Controllers/Power Sequencers General Description Features The MAX5904MAX5909 dual hot-swap controllers Safe Hot-Swap for +1V to +13.2V Power provide complete protection for dual-supply systems. Supplies These devices hot swap two supplies ranging from +1V Requires One Input 2.7V to +13.2V, provided one supply is at or above 2.7V, Low 25mV Default Current-Limit Threshold allowing the safe insertion and removal of circuit cards Inrush Current Regulated at Startup into live backplanes. Circuit Breaker Function The discharged filter capacitors of the circuit card pro- vide low impedance to the live backplane. High inrush Adjustable Circuit Breaker/Current-Limit currents from the backplane to the circuit card can burn Threshold up connectors and components, or momentarily col- VariableSpeed/BiLevel Circuit-Breaker Response lapse the backplane power supply leading to a system Autoretry or Latched Fault Management reset. The MAX5904 family of hot-swap controllers pre- vents such problems by gradually ramping up the output On/Off Sequence Programming voltage and regulating the current to a preset limit when Status Output Indicates Fault/Safe Condition the board is plugged in, allowing the system to stabilize Output Undervoltage and Overvoltage Monitoring safely. After the startup cycle is completed, two on-chip and/or Protection comparators provide VariableSpeed/BiLevel protec- Ordering Information tion against short-circuit and overcurrent faults, as well as immunity against system noise and load transients. In PIN- PKG the event of a fault condition, the load is disconnected. PART TEMP RANGE PACKAGE CODE The MAX5905/MAX5907/MAX5909 must be unlatched after a fault, and the MAX5904/MAX5906/MAX5908 auto- MAX5904ESA* -40C to +85C8 SO S8-4 matically restart after a fault. MAX5904USA 0C to +85C8 SO S8-4 The MAX5904 family offers a variety of options to reduce MAX5905ESA* -40C to +85C8 SO S8-4 component count and design time. All devices integrate MAX5905USA 0C to +85C8 SO S8-4 an on-board charge pump to drive the gates of low-cost, MAX5906EEE* -40C to +85C 16 QSOP E16-1 external n-channel MOSFETs. The devices offer integrat- ed features like startup current regulation and current MAX5906UEE 0C to +85C 16 QSOP E16-1 glitch protection to eliminate external timing resistors and MAX5907EEE* -40C to +85C 16 QSOP E16-1 capacitors. The MAX5906MAX5909 provide an open- MAX5907UEE 0C to +85C 16 QSOP E16-1 drain status output, an adjustable startup timer, an MAX5908EEE* -40C to +85C 16 QSOP E16-1 adjustable current limit, an uncommitted comparator, and output undervoltage/overvoltage monitoring. MAX5908UEE 0C to +85C 16 QSOP E16-1 MAX5909EEE* -40C to +85C 16 QSOP E16-1 The MAX5904/MAX5905 are available in 8-pin SO pack- ages. The MAX5906MAX5909 are available in space- MAX5909UEE 0C to +85C 16 QSOP E16-1 saving 16-pin QSOP packages. *Contact factory for availability. Applications Pin Configurations PCI-Express Applications TOP VIEW Basestation Line Cards IN1 1 8 IN2 Network Switches or Routers SENSE1 2 7 SENSE2 Solid-State Circuit Breaker MAX5904 MAX5905 Power-Supply Sequencing GATE1 3 6 GATE2 Hot Plug-In Daughter Cards GND 4 5 ON RAID NARROW SO 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. Selector Guide and Typical Operating Circuits appear at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLELow-Voltage, Dual Hot-Swap Controllers/Power Sequencers ABSOLUTE MAXIMUM RATINGS IN to GND...........................................................................+14V Continuous Power Dissipation (T = +70C) A GATE to GND..........................................+0.3V to (V + 6.2V) 8-Pin Narrow SO (derate 5.9mW/C above +70C) ......471mW IN ON, PGOOD, COMP+, COMPOUT, TIM 16-Pin QSOP (derate 8.3mW/C above +70C)............667mW to GND.....-0.3V to the higher of (V + 0.3V) and (V + 0.3V) Operating Temperature Ranges: IN1 IN2 SENSE , MON , LIM to GND...................-0.3V to (V + 0.3V) MAX590 U .....................................................0C to +85C IN Current into Any Pin .........................................................50mA MAX590 E ...................................................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C 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 +13.2V provided at least one supply is higher than +2.7V, V = +2.7V, T = 0C to +85C, unless otherwise noted. IN ON A Typical values are at V = +5V, V = +3.3V, and T = +25C.) (Note 1) IN1 IN2 A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLIES IN Input Voltage Range (Note 2) V Other V = +2.7V 1.0 13.2 V IN IN I + I Supply Current I IN1 IN2 1.2 2.9 mA IN CURRENT CONTROL T = +25C 22.5 25 27.5 A MAX5904/MAX5905 T = 0C to +85C 20.5 27.5 A Slow-Comparator Threshold V mV SC,TH (V - V ) (Note 3) IN SENSE LIM = GND 22.5 25 27.5 MAX5906MAX5909 R = 300k 80 100 125 LIM 1mV overdrive 3 ms Slow-Comparator Response Time t SCD (Note 4) 50mV overdrive 110 s V V - V during startup 2 x V SU,TH IN SENSE SC, TH Fast-Comparator Threshold mV V V - V normal operation 4 x V FC,TH IN SENSE SC, TH Fast-Comparator Response Time t 10mV overdrive, from overload condition 260 ns FCD SENSE Input Bias Current I V = V 0.03 6 A B SEN SEN IN MOSFET DRIVER R = 100k 7.1 10.8 15.5 TIM R = 4k (minimum value) 0.31 0.45 0.58 TIM Startup Period t ms START (Note 5) TIM floating for MAX5906MAX5909 3.9 9 16.0 fixed for MAX5904/MAX5905 Charging, V = +5V, V = +10V GATE IN 80 100 130 A (Note 5) Weak discharge, during startup when current Average Gate Current I 100 A GATE limit is active or when 0.4V < V < 0.8V ON Strong discharge, triggered by a fault or 3mA when V < 0.4V ON V - V , I < 1A, V 3V 4.8 5.4 5.8 GATE IN GATE IN Gate-Drive Voltage V V DRIVE V - V , I < 1A, 2.7V V 3V 4.2 5.3 5.8 GATE IN GATE IN ON COMPARATOR Low to high 0.375 0.4 0.425 V Fast Pulldown ON Threshold V ONFP,TH Hysteresis 25 mV 2 MAX5904MAX5909