MAX5915/MAX5915A/MAX5916/MAX5916A 19-2420 Rev 2 9/05 Dual PCI 2.2 Hot-Swap Controllers General Description Features The MAX5915/MAX5915A/MAX5916/MAX5916A dual PCI 2.2 Compliant PCI 2.2 hot-swap controllers allow for safe insertion and Independent Power Controls for +3.3V, +5V, 12V, removal of two PCI cards into live PCI slots or back- and +3.3V Auxiliary Supplies of Two PCI Cards planes by limiting the inrush current at startup. After Internal MOSFET Switches for 12V and +3.3V startup, these devices provide protection against short- Auxiliary Outputs circuit, overcurrent, and undervoltage conditions. Separate ON/OFF Control Input for Each Channel The MAX5915/MAX5915A/MAX5916/MAX5916A pro- vide independent power controls for +3.3V, +5V, 12V, Independent +3.3V Auxiliary Output ON/OFF and +3.3V auxiliary supplies of two PCI cards. These Control devices provide intelligent selective thermal shutdown Overcurrent Foldback with Timeout and Shutdown control that shuts down the channel with an overcurrent Protection for 12V and +3.3V Auxiliary Rails with fault. All devices include internal power MOSFETs for the Status Report +12V, -12V, and +3.3V auxiliary outputs. These devices use internal charge pumps to activate the gates of the Brick Wall with Timeout and Shutdown Protection internal FETs controlling the +3.3V auxiliary supply. for +5V and +3.3V Rails with Status Report Internal FETs and current-sense circuitry regulate the Output Undervoltage Monitoring for +3.3V, +5V, 12V and the +3.3V auxiliary supplies. Channels A and B +12V, and +3.3V Auxiliary Rails with Status Report operate independently, allowing a single device to moni- tor two PCI card slots. +3.3V Auxiliary Autorestart The MAX5915/MAX5915A offer latched fault protection Intelligent Selective Thermal Shutdown Control and the MAX5916/MAX5916A offer autorestart fault pro- Shuts Down Only the Channel with an Overcurrent tection. The devices are available in the low-profile Fault 28-pin TSSOP package. 28-Pin TSSOP Package Ordering Information PART TEMP RANGE PIN-PACKAGE Applications MAX5915EUI* -40C to +85C 28 TSSOP PCI 2.2 Server MAX5915UUI 0C to +85C 28 TSSOP PCI Server MAX5915AEUI* -40C to +85C 28 TSSOP RAID MAX5915AUUI 0C to +85C 28 TSSOP MAX5916EUI* -40C to +85C 28 TSSOP MAX5916UUI 0C to +85C 28 TSSOP Selector Guide, Pin Configuration, Functional Diagram, and MAX5916AEUI* -40C to +85C 28 TSSOP Typical Operating Circuit appear at end of data sheet. MAX5916AUUI 0C to +85C 28 TSSOP *Contact factory for availabilty. Typical Application Circuit FAIRCHILD +3.3V FDS6670A 0.005 470F FAIRCHILD +5V FDS6670A 0.005 470F 5VO 3.3VGATE 3.3VSEN 3.3VO 5VGATE 5VSEN +12VIN +12V +12VO -12V -12VIN -12VO 4.7F 0.1F 47F +3.3VAUX 3.3VAUXIN 3.3VAUXO 4.7F 0.1F 47F 4.7F 0.1F MAX5915 47F MAX5915A 5V ON MAX5916 ON ON MAX5916A OFF AUXON 10k OFF GND PGOOD 10k 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.Dual PCI 2.2 Hot-Swap Controllers ABSOLUTE MAXIMUM RATINGS +12VIN to GND ...................................................-0.3V to +14.0V Operating Temperature Ranges: -12VIN to GND........................................................-14V to +0.3V MAX591 U ......................................................0C to +85C -12VO to GND......................................+0.3V to (V - 0.3V) MAX591 A U ...................................................0C to +85C -12VIN +12VO , 3.3VGATE , 5VGATE MAX591 E ....................................................-40C to +85C to GND..................................................-0.3V to (V + 0.3V) MAX591 AE ................................................-40C to +85C +12VIN Any Other Pin to GND ...........................................-0.3V to +6.0V Maximum Junction Temperature .....................................+150C Continuous Power Dissipation (T = +70C) Storage Temperature Range .............................-65C to +150C A 28-Pin TSSOP (derate 23.8mW/C above +70C) ...........1.9W 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 = -12V, V = +12V, V = +3.3V, V = V = +5V, T = T to T , unless otherwise specified. -12VIN +12VIN 3.3VAUXIN ON AUXON A MIN MAX Typical values are at T = +25C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLIES Main Supply Input Voltage V 10.8 12 13.2 V +12VIN Range Main Supply Undervoltage V V rising 9.6 10 10.8 V +12UVLO +12VIN Lockout (UVLO) Main Supply UVLO Hysteresis V 100 mV UVLO, HYS Main Input UVLO Delay Time t Figures 1 and 2 (Note 1) 1.6 ms DEG, UVLO Supply Current I 2.5 5.0 mA Q +3.3V SUPPLY CONTROL V = + 6V , V = + 3.3V , 3 .3 V GAT E 3 .3 V S E N Gate Charge Current I 515 30 A 3.3VGATE , CHG V = + 3.3V 3 .3V O Gate Discharge Current I V = +12V, V = 0V 50 150 250 A 3.3VGATE , DIS 3.3VGATE ON V - +12VIN Gate High Voltage V I = 1A V V 3.3VGATE , HIGH 3.3VGATE +12VIN 0.5 Gate Low Voltage V I = 1A, V = 0V 0.1 0.4 V 3.3VGATE , LOW 3.3VGATE ON 3.3VO Input Bias Current I V = +3.3V 20 A 3.3VO , BIAS 3.3VO 3.3VO Internal Pulldown R V = 0V 1 k PD ON 3.3VSEN Input Bias Current I V = +3.3V 10 A 3.3VSEN , BIAS 3.3VSEN Current-Limit Threshold V V = +6V 41 46 51 mV 3.3V, LIM 3.3VGATE Output Undervoltage Threshold V V falling 2.79 2.89 2.99 V 3.3VIN, UV 3.3VGATE Output Undervoltage Threshold 30 mV Hysteresis 2 MAX5915/MAX5915A/MAX5916/MAX5916A