LTC4266A/LTC4266C + ++ Quad PoE/PoE /LTPoE PSE Controller Fe A Description n Four Independent PSE Channels The LTC 4266A is a quad power sourcing equipment (PSE) n ++ Compliant with IEEE 802.3at Type 1 and 2 controller capable of delivering up to 90W of LTPoE n ++ power to a compatible LTPoE powered device (PD). A Low Power Dissipation n proprietary detection/classification scheme allows mutual 0.25 Sense Resistance Per Channel ++ ++ n identification between a LTPoE PSE and LTPoE PD Very High Reliability 4-Point PD Detection n while remaining compatible and interoperable with exist- 2-Point Forced Voltage ing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4266A n 2-Point Forced Current feature set is a superset of the popular LTC4266. These n High Capacitance Legacy Device Detection 2 PSE controllers feature low R external MOSFETs and n ON 1MHz I C Compatible Serial Control Interface 0.25 sense resistors which are especially important at n Midspan Backoff Timer ++ the LTPoE current levels to maintain the lowest possible n Supports 2-Pair and 4-Pair Output Power heat dissipation. n Available in Multiple Power Grades n ++ LTC4266A-1: LTPoE 38.7W The LTC4266C targets fully automatic PSE systems pow- n ++ LTC4266A-2: LTPoE 52.7W ering Type 1 (up to 13W) PDs. n ++ LTC4266A-3: LTPoE 70W Advanced power management features include: 14-bit n ++ LTC4266A-4: LTPoE 90W current monitoring ADCs, DAC-programmable current n LTC4266C: PoE 13W limit, and versatile quick shutdown of preselected ports. n Available in 38-Lead 5mm 7mm QFN Package Advanced power management host software is available under a no-cost license. PD discovery uses a proprietary Applic A dual-mode 4-point detection mechanism ensuring excel- lent immunity from false PD detection. The LTC4266 n ++ LTPoE PSE Switches/Routers 2 includes an I C serial interface operable up to 1MHz. n ++ LTPoE PSE Midspans n IEEE 802.3at Type 1 PSE Switches/Routers The LTC4266 is available in multiple power grades allow- n IEEE 802.3at Type 1 PSE Midspans ing delivered PD power of 13W, 25.5W, 38.7W, 52.7W, 70W and 90W. These controllers are available in a 38-lead L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ++ LTPoE and ThinSOT are trademarks of Analog Devices, Inc. All other trademarks are the 5mm 7mm QFN package. property of their respective owners. t Al Applic A Complete 4-Port Ethernet High Power Source 10 AD0 AD1 AD2 AD3 SHDN1 SHDN2 SHDN3 SHDN4 AUTO MSD RESET MID SDAIN SCL 3.3V V DD 0.1F SDAOUT SMAJ5.0A + INT DGND 10F LTC4266 0.22F 100V S1B S1B 10 4 4 4 AGND 54V V SENSE1 GATE1 OUT1 SENSE2 GATE2 OUT2 SENSE3 GATE3 OUT3 SENSE4 GATE4 OUT4 SMAJ58A EE + C 1F BULK 100V TVS BULK PORT1 54V PORT2 PORT3 PORT4 4266AC TA01 4266acfe 1 For more information www.linear.com/LTC4266A tion ypic tions turesLTC4266A/LTC4266C Absolute M A Mu M rA p in c F A Supply Voltages (Note 1) TOP VIEW AGND V ........................................... 0.3V to 80V EE DGND V ........................................... 0.3V to 80V EE V DGND ......................................... 0.3V to 5.5V DD 38 37 36 35 34 33 32 Digital Pins SDAOUT 1 31 GATE1 SCL, SDAIN, SDAOUT, INT, SHDNn, MSD, ADn, NC 2 30 SENSE1 RESET, AUTO, MID ........... DGND 0.3V to V + 0.3V SDAIN OUT2 3 29 DD AD3 GATE2 Analog Pins 4 28 AD2 5 27 SENSE2 GATEn, SENSEn, OUTn .......... V 0.3V to V + 80V EE EE AD1 6 26 V EE Operating Temperature Range V EE AD0 7 25 V 39 EE LTC4266I .............................................40C to 85C DNC 8 24 OUT3 Junction Temperature (Note 2) ............................. 125C NC GATE3 9 23 Storage Temperature Range .................. 65C to 150C DGND 10 22 SENSE3 Lead Temperature (Soldering, 10 sec) ...................300C NC 11 21 OUT4 NC 12 20 GATE4 13 14 15 16 17 18 19 UHF PACKAGE 38-LEAD (5mm 7mm) PLASTIC QFN EXPOSED PAD IS V (PIN 39) MUST BE SOLDERED TO PCB EE T = 125C, = 34C/W JMAX JA o r Der i n F MA