MAX34561 19-5621 Rev 1 1/12 12V/5V Hot-Plug Switch General Description Features The MAX34561 is a dual, self-contained, hot-plug switch S Completely Integrated Hot-Plug Functionality for intended to be used on +12V and +5V power rails to limit +12V and +5V Power Rails through current and to control the power-up output-volt- S Dual Version of the DS4560 age ramp. The device contains two on-board n-channel S On-Board Power MOSFETs (68mI and 43mI) power MOSFETs that are actively closed-loop controlled to ensure that an adjustable current limit is not exceed- S No High-Power R Resistors Needed SENSE ed. The maximum allowable current through the device S Adjustable Current Limits is adjusted by external resistors connected between the S Adjustable Output-Voltage Slew Rates LOAD and ILIM pins. S Adjustable Power-Up Enable Timing The device can control the power-up output-voltage S Output Overvoltage Limiting ramp. Capacitors connected to the VRAMP pins set the desired voltage-ramp rate. The output voltages S On-Board Thermal Protection are unconditionally clamped to keep input overvoltage S On-Board Charge Pump stresses from harming the load. The device also contains S User-Selectable Latchoff or Automatic Retry adjustable power-up timers. Capacitors connected to Operation the TIMER pins determine how long after power-on reset (POR) the device should wait before starting to apply Ordering Information power to the loads. The TIMER pins can be driven with a digital logic output to create a device-enable function. PART TEMP RANGE PIN-PACKAGE The device contains an on-board temperature sensor MAX34561T+ -40NC to +85NC 24 TQFN-EP* with hysteresis. If operating conditions cause the device MAX34561T+T -40NC to +85NC 24 TQFN-EP* to exceed an internal thermal limit, the device either +Denotes a lead(Pb)-free/RoHS compliant package. unconditionally shuts down and latches off awaiting a T = Tape and reel. POR, or waits until the device has cooled by the hyster- *EP = Exposed pad. esis amount and then restarts. Applications RAID/Hard Drives Servers/Routers M PCI/PCI Express TM/SM InfiniBand Base Stations PCI Express is a registered trademark of PCI-SIG Corp. InfiniBand is a trademark and service mark of InfiniBand Trade Association. 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.12V/5V Hot-Plug Switch ABSOLUTE MAXIMUM RATINGS Voltage Range on V Relative to GND ............-0.3V to +6.5V 12V Drain Current CC5 Voltage Range on V Relative to GND ...........-0.3V to +18V Continuous ............................................................................3A CC12 Voltage Range on ILIM5, VRAMP5, Peak ......................................................................................4A TIMER5, ARD5 Relative to GND .........-0.3V to (V + 0.3V), Continuous Power Dissipation (T = +70NC) CC5 A not to exceed +6.5V TQFN (derate 20.8mW/NC above +70NC) ...............1666.7mW Voltage Range on ILIM12, VRAMP12 Operating Junction Temperature Range ......... -40NC to +135NC Relative to GND ................................-0.3V to (V + 0.3V), Operating Temperature Range .......................... -40NC to +85NC CC12 not to exceed +18V Storage Temperature Range .......................... -55NC to +135NC Voltage Range on TIMER12, ARD12 Lead Temperature (soldering, 10s) ................................+300NC Relative to GND .......................................-0.3V to +5V (V ) Soldering Temperature (reflow) ......................................+260NC REG 5V Drain Current Continuous ............................................................................2A Peak ......................................................................................4A 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. RECOMMENDED OPERATING CONDITIONS (T = -40NC to +135NC) J PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V Voltage V (Notes 1, 2) 4.0 5.0 5.5 V CC5 CC5 V Voltage V (Notes 1, 2) 9 12 13.2 V CC12 CC12 R Value R 20 400 I ILIM ILIM C Value C 0.04 5 FF VRAMP VRAMP C Value C 0.04 5 FF TIMER TIMER TIMER5 2.1 V + 0.3 CC5 TIMER Turn-On Voltage V V ON TIMER12 2.6 5.0 TIMER Turn-Off Voltage V -0.3 +1.5 V OFF ELECTRICAL CHARACTERISTICS (V = +5V, V = +12V, T = +25NC, unless otherwise noted.) CC5 CC12 J PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V Supply Current I (Note 3) 1.5 2 mA CC5 CC5 V Supply Current I (Note 3) 1.5 2.25 mA CC12 CC12 5V UVLO: Rising V 3.7 3.95 V UR5 5V UVLO: Falling V 2.7 3.2 V UF5 5V UVLO: Hysteresis V 0.5 V UH5 12V UVLO: Rising V 8 8.5 V UR12 12V UVLO: Falling V 6.5 7 V UF12 12V UVLO: Hysteresis V 1 V UH12 5V On-Resistance R 43 56 mI ON5 12V On-Resistance R 68 88 mI ON12 5V Internal Voltage Reference V 1.80 V REF5 12V Internal Voltage Reference V 2.35 V REF12 2 MAX34561