MAX5970 19-5128 Rev 0 1/10 0V to 16V, Dual Hot-Swap Controller with 10-Bit Current and Voltage Monitor and 4 LED Drivers General Description Features The MAX5970 dual hot-swap controller provides com- S Two Independent Hot-Swap Controllers Operate plete protection for systems with two supply voltages from 0V to +16V from 0V to +16V. The MAX5970 includes four program- S 10-Bit ADC Monitors Voltage and Current of Each mable LED outputs. The two hot-swap channels can be Channel configured to operate as independent hot-swap control- S Circular Buffers Store 5ms of Current and Voltage lers, or as a pair operating together so that both chan- Measurements nels shut down if either channel experiences a fault. S Two Independent Internal Charge Pumps The MAX5970 provides two programmable levels of Generate n-Channel MOSFET Gate Drives overcurrent circuit-breaker protection: a fast-trip thresh- old for a fast turn-off, and a lower slow-trip threshold for S Internal 500mA Gate Pulldown Current for Fast Shutdown a delayed turn-off. The maximum overcurrent circuit- breaker threshold range is set independently for each S VariableSpeed/BiLevel Circuit-Breaker channel with a trilevel logic input IRNG , or by program- Protection 2 ming though the I C interface. S Independent Precision-Voltage Enable Inputs The MAX5970 is an advanced hot-swap controller that S Alert Output Indicates Fault and Warning monitors voltage and current with an internal 10-bit Conditions ADC which is continuously multiplexed to convert the S Independent Power-Good Outputs output voltage and current of both hot-swap channels at 10ksps. Each 10-bit sample is stored in an internal circu- S Independent Fault Outputs lar buffer so that 50 past samples of each signal can be S Four Open-Drain Outputs Sink 25mA to Directly 2 read back through the I C interface at any time or after Drive LEDs a fault condition. S Programmable LED Flashing Function The device includes five user-programmable digital S Autoretry or Latched Fault Management comparators per hot-swap channel to implement over- current warning and two levels of overvoltage/undervolt- 2 S 400kHz I C Interface age detection. When any of the measured values violates S Small 6mm x 6mm, 36-Pin TQFN-EP Package the programmable limits, an external ALERT output is asserted. In addition to the ALERT signal, the MAX5970 Applications can be programmed to deassert the power-good signal M Single PCI Express Hot-Plug Slot and/or turn off the external MOSFET. Blade Servers The MAX5970 features four I/Os that can be indepen- dently configured as general-purpose inputs/outputs Disk Drives/DASD/Storage Systems (GPIOs) or as open-drain LED drivers with program- Soft-Switch for ASICs, FPGAs, and Microcontrollers mable blinking. These four I/Os can be configured for with Independent Core and I/O Voltages any mix of LED driver or GPIO function. Ordering Information The MAX5970 is available in a 36-pin thin QFN-EP pack- age and operates over the -40NC to +85NC extended PART TEMP RANGE PIN-PACKAGE temperature range. MAX5970ETX+ -40NC to +85NC 36 TQFN-EP* +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. VariableSpeed/BiLevel is a trademark of Maxim Integrated Products, Inc. PCI Express is a registered trademark of PCI-SIG Corp. 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 AVAILABLE0V to 16V, Dual Hot-Swap Controller with 10-Bit Current and Voltage Monitor and 4 LED Drivers ABSOLUTE MAXIMUM RATINGS IN, SENSE , MON , GATE to AGND ..................-0.3V to +30V GATE , MON , GND Current .........................................750mA LED to AGND ......................................................-0.3V to +16V All Other Pins Input/Output Current ...................................20mA ON , SDA, SCL to AGND ........................................-0.3V to +6V Continuous Power Dissipation (T = +70NC) A REG, DREG, IRNG , MODE, PROT, A , 36-Pin, 6mm x 6mm TQFN PG , ALERT, FAULT to AGND ................................ -0.3V to +4V (derate 35.7mW/C above +70C)..........................2857mW** REG to DREG .......................................................-0.3V to +0.3V Junction-to-Ambient Thermal Resistance (B ) (Note 1) .. 28NC/W JA RETRY, HWEN, POL to AGND ................-0.3V to (V + 0.3V) Operating Temperature Range .......................... -40NC to +85NC REG GATE1 to MON1, GATE2 to MON2 ........................-0.3V to +6V Junction Temperature .....................................................+150NC GND , DGND to AGND .......................................-0.3V to +0.3V Storage Temperature Range ............................ -65NC to +150NC SDA, ALERT Current ....................................... -20mA to +50mA Lead Temperature (soldering, 10s) ................................+300NC LED Current ................................................. -20mA to +100mA Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four- layer board. For detailed information on package thermal consideration, refer to www.maxim-ic.com/thermal-tutorial. **As per JEDEC51 Standard (Multilayer Board) 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 = 2.7V to 16V, T = -40NC to +85NC, unless otherwise noted. Typical values are at V = 3.3V and T = +25NC.) (Note 2) IN A IN A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Input-Voltage Range V 2.7 16 V IN Hot-Swap Voltage Range 0 16 V Supply Current I 2.5 4 mA IN Internal LDO Output Voltage REG I = 0 to 5mA, V = 2.7V to 16V 2.49 2.53 2.6 V REG IN Undervoltage Lockout UVLO V rising 2.7 V IN Undervoltage Lockout UVLO 100 mV HYS Hysteresis CURRENT-MONITORING FUNCTION MON , SENSE Input-Voltage 0 16 V Range SENSE Input Current V , V = 16V 32 75 FA SENSE MON MON Input Current V , V = 16V 180 280 FA SENSE MON 25mV range 24.34 Current Measurement LSB 50mV range 48.39 FV Voltage 100mV range 96.77 V - V = 5mV -6.57 +6.22 SENSE MON V = 0V MON V - V = 20mV -6.71 +6.82 Current Measurement Error SENSE MON % FS (25mV Range) V - V = 5mV -9.71 +8.92 V = 2.5V SENSE MON MON to 16V V - V = 20mV -10.24 +9.36 SENSE MON V - V = 10mV -4.24 +3.78 SENSE MON V = 0V MON V - V = 40mV -4.53 +5.36 Current Measurement Error SENSE MON % FS (50mV Range) V - V = 10mV -4.50 +4.00 V = 2.5V SENSE MON MON to 16V V - V = 40mV -4.20 +4.50 SENSE MON 2 MAX5970