MAX5913A/MAX5914A 19-3302 Rev 1 1/11 +48V Quad Hot-Swap Controllers For Power-Over-LAN General Description Features The MAX5913A/MAX5914A are quadruple hot-swap con- Wide Operating Input Voltage Range: trollers. The MAX5913A/MAX5914A independently con- +35V to +72V trol four external n-channel switches to hot-swap system IEEE 802.3af Compatible loads from a single V supply line. The devices allow CC the safe insertion and removal of power devices from live Four Independent Power Switch Controllers network ports. The operating supply voltage range is Open-Circuit Detector between +35V and +72V. The devices are intended for On-Board Charge Pumps to Drive External applications in Power-Over-Media-Dependent Interface n-Channel FETs (MDI), but are not limited to such usage. Current Sense with External Resistor The MAX5913A/MAX5914A feature an internal under- voltage lockout (UVLO) function that prevents the FET Foldback Current Limiting from turning on, if V does not exceed the default CC +32V Input Undervoltage Lockout value of +32V. The devices also feature a +12V relay driver with 100mA current drive capable of driving low- On-Chip +12V, 100mA Voltage Relay Drivers voltage +3.3V relays. The MAX5913A features an active-low relay driver that sinks current when the relay Ordering Information output is enabled. The MAX5914A features an active- high relay driver output that sources 1mA to drive an PART TEMP RANGE PIN-PACKAGE external FET relay driver when the relay output is MAX5913AEMH+ -40C to +85C 44 MQFP enabled. Control circuitry ensures the relays and the MAX5913AEMH+T -40C to +85C 44 MQFP FETs are off until V reaches the UVLO threshold. The CC MAX5913A/MAX5914A use an external sense resistor MAX5914AEMH+ -40C to +85C 44 MQFP to enable all the internal current-sense functions. MAX5914AEMH+T -40C to +85C 44 MQFP The MAX5913A/MAX5914A feature a programmable +Denotes a lead(Pb)-free/RoHS-compliant package. analog current-limit circuit. If the switch remains in current T = Tape and reel. limit for more than a programmable time, the n-channel FET latches off and the supply can be restarted either by Pin Configuration autoretry or by an external command after the preset off- time has elapsed. TOP VIEW The MAX5913A/MAX5914A are available in a 44-pin MQFP package and are specified for the extended -40C to +85C operating temperature range. + 1 33 RTRYEN FAULT STAT1 2 32 STATOUT Applications STAT2 3 31 OCEN STAT3 4 30 DGND Power-Over-LAN STAT4 5 29 V CC Power-Over-MDI CSP1 CSP4 6 MAX5913A 28 DRAIN4 7 MAX5914A 27 DRAIN1 IP Phone Switches/Routers OUT4 8 26 GATE1 Telecom Line Cards GATE4 9 25 OUT1 Network Switches/Routers CSP3 10 24 CSP2 DRAIN2 DRAIN3 11 23 Midspan Power-Over-MDI Typical Operating Circuit appears at end of data sheet. IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc. MQFP 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. OUT3 12 44 V DD GATE3 13 43 RTIM V 14 42 ON4 RLY RLYD3 15 41 RLYON4 RLYD4 16 40 ON3 DGND 17 39 RLYON3 RLYD1 18 38 ON2 RLYD2 19 37 RLYON2 AGND 36 ON1 20 OUT2 21 35 RLYON1 GATE2 22 34 DC+48V Quad Hot-Swap Controllers For Power-Over-LAN ABSOLUTE MAXIMUM RATINGS V to AGND or DGND..........................................-0.6V to +76V V to DGND ...........................................................-0.3V to +7V CC DD DRAIN , OUT to AGND or DGND .............-0.6V to (V +0.3V) DGND to AGND...........................................................-5V to +5V CC CSP to V ..........................................................-0.3V to +0.3V Current into RLYD .........................................-50mA to +150mA CC GATE to OUT .....................................................-0.3V to +13V Current into Any Other Pin................................................50mA V to DGND ........................................................-0.3V to +18V Continuous Power Dissipation (T = +70C) RLY A RLYD to DGND........................................-0.3V to (V + 0.3V) 44-Pin MQFP (derate 12.7mW/C above +70C)......... 1.013W RLY ON , RLYON , OCEN, RTRYEN, STATOUT, Operating Temperature Range ...........................-40C to +85C DC to DGND........................................................-0.3V to +12V Storage Temperature Range .............................-65C to +150C FAULT to DGND.....................................................-0.3V to +12V Lead Temperature (soldering, 10s) ................................ +300C STAT , RTIM to DGND ...............................-0.3V to (V + 0.3V) DD 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 = +48V, V = V = 0V, V = +3.3V, V = +12V, T = -40C to +85C, unless otherwise noted. Typical val- CC CSP AGND DGND DD RLY A ues are at V = V = +48V and T = +25C.) CC CSP A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLIES Analog Supply Voltage V Measured with respect to AGND 35 72 V CC T = 0C to +85C 2.7 4 V = V = 72V A CC CSP Analog Supply Current I mA S I = I + I S CC CSP T = -40C to 0C 5 A Digital Supply Voltage V Measured with respect to DGND 2.5 3.3 3.7 V DD Digital Supply Current I All logic outputs high, RTIM unconnected 1.1 3 mA DD Analog Supply Undervoltage V V rising, circuits enabled 29 32 35 V UVLO CC Lockout UVLO Hysteresis V 3V UVLO,H UVLO Deglitch Delay t V = 3.3V, V = 3.3V (Figure 1) 12.8 25.6 38.4 ms D,UVLO ON RLYON Relay Driver Supply V Measured with respect to DGND 14 V RLY Ground Potential Difference V Voltage difference between DGND and AGND -4 4 V GG FEEDBACK INPUT AND CURRENT SENSE OUT Sense Bias Current I V = V 2A FP OUT CC Voltage under which the foldback circuit Initial Feedback Voltage V starts reducing the current-limit value 18 V FB S (Note 1) Current-Limit Threshold Voltage V Maximum V across R at V > V 125 142.5 160 mV SC SENSE OUT FB S Foldback Voltage V Maximum V across R at V = 0V 42 48 54 mV FLBK SENSE OUT Fast Discharge Threshold V 360 420 480 mV FC Maximum V - V at which the switch is CC OUT Switch-On Threshold V 1.2 1.5 1.8 V SWON defined as fully on, V increasing OUT Switch-On Comparator Hysteresis V 160 mV SWON H MOSFET DRIVERS V - V when switch is fully on GATE CC 79 11 0C to +85C Gate Overdrive Voltage V V GS T = -40C to 0C7912 A Gate Charge Current I V = 0V 7 10 13 A GATE GATE 2 MAX5913A/MAX5914A