MAX5959/MAX5960 19-0856 Rev 0 7/07 Quad PCI Express, Hot-Plug Controllers General Description Features The MAX5959/MAX5960 quad hot-plug controllers are PCIe Compliant designed for PCI Express (PCIe) applications. These Hot Swap 12V, 3.3V, and 3.3V Auxiliary for 4 devices provide hot-plug control for the main 12V, 3.3V, PCIe Slots and 3.3V auxiliary supplies of four PCIe slots. The MAX5959/MAX5960s logic inputs/outputs allow interfac- Integrated Power MOSFETs for Auxiliary Supply ing directly with the system hot-plug management con- Rails troller or through an SMBus with an external I/O Controls di/dt and dV/dt expander such as the MAX7313. An integrated debounced attention switch and present-detect signals Active Current Limiting Protects Against simplify system design. Overcurrent/Short-Circuit Conditions The MAX5959/MAX5960 drive eight external n-channel Programmable Current-Limit Timeout MOSFETs to control the 12V and 3.3V main outputs. The 3.3V auxiliary outputs are controlled through 0.2 n-chan- PWRGD Signal Outputs with Programmable nel MOSFETs. Internal charge pumps provide the gate Power-On Reset (POR) (160ms Default) drive for the 12V outputs while the gate drive of the 3.3V Latched FAULT Signal Output After Overcurrent output is driven by the 12V input supply clamped to 5.5V above the respective 3.3V main supply rail. The 3.3V aux- or Overtemperature Fault iliary outputs are completely independent from the main Attention Switch Inputs/Outputs with 4ms outputs with their own charge pumps. Debounce At power-up, the MAX5959/MAX5960 keep all the Present-Detect Inputs MOSFETs off until the supplies rise above their respective undervoltage lockout (UVLO) thresholds. Upon a turn-on Force-On Inputs Facilitate Testing/Debug command, the MAX5959/MAX5960 enhance the external Thermal Shutdown and internal MOSFETs slowly with a constant gate current to limit the power-supply inrush current. Allow Control Through SMBus with an I/O The MAX5959/MAX5960 actively limit the current to pro- Expander tect all outputs at all times and shut down if an overcur- Ordering Information rent condition persists longer than the programmable overcurrent timeout. After an overcurrent or overtempera- PIN- PKG PART TEMP RANGE ture fault condition, the MAX5959L/MAX5960L latch off PACKAGE CODE while the MAX5959A/MAX5960A automatically restart MAX5959AECS+ -40C to +85C 80 TQFP C80-1 after a restart time delay. The MAX5959/MAX5960 are MAX5959LECS+ -40C to +85C 80 TQFP C80-1 offered in latch-off or autorestart versions (see the Selector Guide). MAX5960AECS+ -40C to +85C 80 TQFP C80-1 The MAX5959/MAX5960 are available in an 80-pin TQFP MAX5960LECS+ -40C to +85C 80 TQFP C80-1 package and operate over the -40C to +85C tempera- +Denotes a lead-free package. ture range. Pin Configuration and Typical Application Circuit appear at Applications end of data sheet. Servers PCI Express is a registered trademark of PCI-SIG Corp. Desktop Mobile Server Platforms SMBus is a trademark of Intel Corp. Workstations Selector Guide PART LATCH OFF AUTORESTART GUARANTEED AUX CURRENT (mA) MAX5959AECS+ 375 MAX5959LECS+ 375 MAX5960AECS+ 550 MAX5960LECS+ 550 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. EVALUATION KIT AVAILABLEQuad PCI Express, Hot-Plug Controllers ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) Continuous Power Dissipation (T = +70C) A 12VIN......................................................................-0.3V to +14V 80-Pin TQFP (derate 23.3mW/C above +70C).........1860mW 12G ..........................................................-0.3V to (V + 6V) Operating Temperature Range ...........................-40C to +85C 12VIN 12S +, 12S -, 3.3G ..............................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C 12VIN 3.3VAUXIN, ON , FAULT , PWRGD .......................-0.3V to +6V Storage Temperature Range .............................-65C to +150C PGND ....................................................................-0.3V to +0.3V Lead Temperature (soldering, 10s) .................................+300C All Other Pins ..................................-0.3V to (V + 0.3V) 3.3VAUXIN 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 = V = V = 12V, V = V = V = V = V = V = 3.3V, PWRGD = FAULT = PORADJ 12VIN 12S + 12S - 3.3S + 3.3S - 3.3AUXIN ON AUXON FON = TIM = OUTPUT = 12G = 3.3G = OPEN, INPUT = PRES-DET = PGND = GND, T = T = -40C to +85C, unless otherwise A J noted. Typical values are at T = T = +25C.) (Note 1) A J PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 12V SUPPLY (MAIN) 12V Supply Input-Voltage Range V 10.8 12 13.2 V 12VIN V rising 9.5 10 10.5 12VIN 12V Undervoltage Lockout V V 12UVLO Hysteresis 0.1 12V Undervoltage Lockout V falling below V to UVLO 12IN 12UVLO t 30 s DEG,UVLO Deglitch Time assertion 12V Supply Current I V = 13.2V 1 2.5 mA 12VIN 12VIN 12VIN CONTROL 12VIN Current-Limit Threshold V 49 54 59 mV 12ILIM (V - V ) 12S+ 12S- 12G Gate Charge Current I V = GND 4 5 6 A 12G, CHG 12G Normal turn-off, ON = GND, 50 150 250 A V = 2V 12G 12G Gate Discharge Current I 12G , DIS Output short-circuit condition, strong gate pulldown to regulation, 60 120 200 mA (V - V ) 1V, V = 5V 12S+ 12S- 12G 12G Gate High Voltage V I = 1A 4.8 5.3 5.8 V 12G, H 12G (V - V ) 12G 12VIN Referred to V , I = 1A 12VIN 12G 12G Threshold Voltage for V 3 4 4.8 V PGTH12 (Note 2) PWRGD Assertion 12S - Input Bias Current 1A 12S + Input Bias Current 10 30 A 3.3V SUPPLY (MAIN) 3.3V Supply Voltage Range V 3.0 3.3 3.6 V 3.3S + 3.3SA+ rising 2.50 2.65 2.78 V Undervoltage Lockout (Note 3) Hysteresis 30 mV 2 MAX5959/MAX5960