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MP8009A PoE PD Interface QFN-28
The MPS MP8009A is a PoE PD Interface. It switches at 250 kHz. It is supplied in a QFN-28 package.
The MP8009A is an integrated IEEE 802.3af/at- compliant, Power over Ethernet (PoE) powered device (PD) power supply converter.
Key Specifications
| Part Number | MP8009A |
| Function | PoE PD Interface |
| Switching Frequency | 250 kHz |
| Package | QFN-28 |
| Ordering Codes | MP8009A |
Features
- IEEE 802.3af/at Compliant
- 100V, 0.48Ω Powered Device (PD) Integrated Pass MOSEFT
- 120mA PD Inrush Current (ILIMIT_INRUSH)
- 840mA PD Operational Current Limit (ILIMIT)
- Supports >8.5V Auxiliary Adapter Supply
- 2A GATE Driver and 0.8A SYNC Driver
- 160mV Switching Current-Sense Limit
- 32ms Soft-Start Time (tSS)
- 250kHz Fixed Switching Frequency (fSW)
- Frequency Dithering for EMI Reduction
Typical Application Circuit
Applications
- IEEE 802.3af/at-Compliant Devices
- Security Cameras
- Video Telephones
- Wireless Local Area Network (WLAN) Access Points
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
Which package and ordering codes apply to the MP8009A?
QFN-28; order codes include MP8009A.
What are the defining features of the MP8009A?
IEEE 802.3af/at Compliant 100V, 0.48Ω Powered Device (PD) Integrated Pass MOSEFT
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