DS4560 19-4619 Rev 2 5/09 12V Hot-Plug Switch General Description Features The DS4560 is a self-contained hot-plug switch intend- On-Board 25m Power MOSFET ed to be used on +12V power buses to limit through Adjustable Short-Circuit Current and Overload current and to control the power-up output-voltage Current Limit ramp. The device contains an on-board 25m n-chan- nel power MOSFET that is actively closed-loop con- Adjustable Output-Voltage Slew Rate trolled to ensure that an adjustable current limit is not Adjustable Power-Up Timer with External Enable exceeded. The maximum allowable current through the device is determined by an external resistor connected Capability to the ILIM pin. Output Overvoltage Limiting The DS4560 also contains the ability to control the On-Board Thermal Protection power-up output-voltage ramp. A capacitor connected to the VRAMP pin sets the desired voltage ramp rate. On-Board Charge Pump The output voltage is unconditionally clamped to keep Latchoff and Autoretry Versions Available input overvoltage stresses from harming the load. The DS4560 also contains an adjustable power-up timer. A 9.0V to 13.2V Supply Operation capacitor connected to the TIMER pin determines how 8-Pin SO (150 mils) Pb-Free Package long after power-on reset the DS4560 should wait before starting to apply power to the load. The TIMER UL Certification Record E211395 pin can also be driven with a digital logic output to cre- ate a device-enable function. Pin Configuration The DS4560 contains an on-board temperature sensor with hysteresis. If operating conditions cause the TOP VIEW device to exceed an internal thermal limit, the DS4560 either unconditionally shuts down and latches off await- + ing a power-on reset (DS4560S-LO), or it waits until the GND18V CC device has cooled by the hysteresis amount and then VRAMP 2 7 LOAD restarts (DS4560S-AR). DS4560 TIMER 3 6 LOAD Applications ILIM45 LOAD SM RAID/Hard Drives InfiniBand SO (150 mils) Servers/Routers Base Stations PCI/PCI Express Ordering Information Pin Description THERMAL PIN NAME FUNCTION PART PIN-PACKAGE SHUTDOWN Ground. This is also a heat sink for the 1 GND DS4560S-LO+ Latchoff 8 SO device. DS4560S-LO+T Latchoff 8 SO 2 VRAMP Output-Voltage Ramp Adjustment DS4560S-AR+ Autoretry 8 SO 3 TIMER Power-Up Timer/Enable DS4560S-AR+T Autoretry 8 SO 4 ILIM Current-Limit Adjustment +Denotes a lead(Pb)-free/RoHS-compliant package. 5, 6, 7 LOAD Output Load Connection (MOSFET Source) T = Tape and reel. 8 V Input Supply Voltage (MOSFET Drain) CC PCI Express is a registered trademark of PCI-SIG Corp. InfiniBand is a trademark and service mark of the 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 Hot-Plug Switch ABSOLUTE MAXIMUM RATINGS Voltage Range on V and LOAD Relative to GND Drain Current CC Continuous .........................................................-0.3V to +18V Continuous...........................................................................4A 1ms Maximum ....................................................-0.3V to +22V Peak ...................................................................................15A Voltage Range on ILIM and VRAMP Operating Junction Temperature Range...........-40C to +135C Relative to GND.....................................-0.3V to (V + 0.3V), Storage Temperature Range .............................-55C to +135C CC but not to exceed +18V Soldering Temperature...........................Refer to the IPC/JEDEC Voltage Range on TIMER Relative to GND ...........-0.3V to +5.0V J-STD-020 Specification. 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 = -40C to +135C.) J PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Notes 1, 2) 9.0 13.2 V CC R Value R 20 400 ILIM ILIM C Value C 0.04 5.00 F VRAMP VRAMP CValue C 0.04 5.00 F TIMER TIMER TIMER Turn-On Voltage V 2.6 5 V ON TIMER Turn-Off Voltage V -0.3 +2.0 V OFF ELECTRICAL CHARACTERISTICS (V = +12V, T = +25C, unless otherwise noted.) CC J PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Current I (Note 3) 1.1 2.00 mA CC UVLO Rising V 7.5 8.0 8.5 V UVLOR UVLO Falling V 6.5 7.0 7.5 V UVLOF UVLO Hysteresis V 1 V UVLOH On-Resistance R 25 32 m ON MOSFET Output Capacitance C 500 pF OUT LOAD Voltage During Off State V (Note 4) 200 mV LOFF Delay Time from Enable to t C = 1F 5 ms POND VRAMP Beginning of Conduction Gate-Charging Time from t C = 1F, C = 1000F 48 66 80 ms GCT VRAMP LOAD Conduction to 90% of V OUT Shutdown Junction Temperature T (Note 5) 120 135 150 C SHDN Thermal Hysteresis T (Note 5) 40 C HYS TIMER Charging Current I 70 80 92 A TIMER Overvoltage Clamp V 13.5 15.0 16.5 V OVC 2 DS4560