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MAX5969B Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX5969B Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 14 page _______________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. _______________________________________________________________ Maxim Integrated Products 1 IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with Integrated Power MOSFET General Description The MAX5969A/MAX5969B provide a complete interface for a powered device (PD) to comply with the IEEE® 802.3af/at standard in a power-over-Ethernet (PoE) sys- tem. The MAX5969A/MAX5969B provide the PD with a detection signature, classification signature, and an inte- grated isolation power switch with inrush current control. During the inrush period, the MAX5969A/MAX5969B limit the current to less than 180mA before switching to the higher current limit (720mA to 880mA) when the isolation power MOSFET is fully enhanced. The devices feature an input UVLO with wide hysteresis and long deglitch time to compensate for twisted-pair cable resistive drop and to assure glitch-free transition during power-on/-off conditions. The MAX5969A/MAX5969B can withstand up to 100V at the input. The MAX5969A/MAX5969B support a 2-event classifica- tion method as specified in the IEEE 802.3at standard and provide a signal to indicate when probed by Type 2 power-sourcing equipment (PSE). The devices detect the presence of a wall adapter power-source connec- tion and allow a smooth switchover from the PoE power source to the wall power adapter. The MAX5969A/MAX5969B also provide a power-good (PG) signal, two-step current limit and foldback, over- temperature protection, and di/dt limit. The MAX5969A/MAX5969B are available in a space-sav- ing, 10-pin, 3mm x 3mm, TDFN power package. These devices are rated over the -40NC to +85NC extended temperature range. Applications IEEE 802.3af/at Powered Devices IP Phones, Wireless Access Nodes, IP Security Cameras WiMAXK Base Station Features S IEEE 802.3af/at Compliant S 2-Event Classification S Simplified Wall Adapter Interface S PoE Classification 0 to 5 S 100V Input Absolute Maximum Rating S Inrush Current Limit of 180mA Maximum S Current Limit During Normal Operation Between 720mA and 880mA S Current Limit and Foldback S Legacy UVLO at 36V (MAX5969A) S IEEE 802.3af/at-Compliant, 40V UVLO (MAX5969B) S Overtemperature Protection S Thermally Enhanced, 3mm x 3mm, 10-Pin TDFN 19-5008; Rev 0; 12/09 +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. Ordering Information Pin Configuration IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc. WiMAX is a trademark of WiMAX Forum. EVALUATION KIT AVAILABLE PART TEMP RANGE PIN- PACKAGE UVLO THRESHOLD (V) MAX5969AETB+ -40NC to +85NC 10 TDFN-EP* 35.4 MAX5969BETB+ -40NC to +85NC 10 TDFN-EP* 38.6 1 3 4 10 8 7 CLS PG WAD VDD N.C. I.C. EP* *EP = EXPOSED PAD. CONNECT TO VSS. MAX5969A MAX5969B 2 9 2EC DET 5 6 RTN VSS TDFN (3mm × 3mm) TOP VIEW + |
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