MP8005 13W 802.3af PoE Powered Device (PD) Interface and PWM Controller TSSOP-20

MP8005 13W 802.3af PoE Powered Device (PD) Interface and PWM Controller TSSOP-20

The MP8005 is a complete integrated IEEE 802.3af POE compliant Powered Device (PD) power supply solution.

Key Specifications

Features

• Meets IEEE 802.3af Specifications
• 100V, 1Ω Integrated switch
• 460mA max, Temperature Compensated Current Limit
• Isolated Synchronous Controller
• 20 pin TSSOP Package

Typical Application Circuit

Applications

• VoIP Telephones
• Network Cards
• Security Camera Systems
• Safety Backup Power

Design Notes

• Rail sequencing order and delay are part of the SoC power-up contract; a wrong order latches the processor even though every rail is in spec.
• In multiphase designs, current balance depends on the loop matching between phases, so keep the layout symmetric.
• Digital interfaces (PMBus, I²C) need pull-ups to the correct rail and a defined state during power-up.
• Thermal design is a system problem here: the PMIC sits next to the load it feeds, so budget the shared copper, not the package alone.

Common Questions