IEEE 802.3at PoE High-Power PD Interface with External Gate Driver - TPS2379


IEEE 802.3at PoE High-Power PD Interface with External Gate Driver


This 8-pin integrated circuit contains all of the features needed to implement an IEEE802.3at type-2 powered device (PD). The low 0.5 Ω internal switch resistance, combined with the enhanced thermal dissipation of the PowerPad™ package, enables this controller to continuously handle up to 0.85 A. The TPS2379 supports higher-power applications through the use of an external pass transistor. It also features a 100 V internal pass transistor, 140 mA inrush current, type-2 indication, auto-retry fault protection, and an open-drain power-good output.


  • IEEE 802.3at Type-2 Hardware Classification with Status Flag
  • Auxiliary Gate Driver for High-power Expansion
  • Robust 100 V, 0.5 Ω Hotswap MOSFET
  • 1A (typ.) Operating Current Limit
  • 140 mA (typ.) Inrush Current Limit
  • DC/DC Converter Enable
  • 15 kV/8 kV System-level ESD Capability
  • PowerPad SO-8 Package

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Parametrics Compare all products in Powered Device

Fault Response
rDS(on) per FET (Typ) (mOhms)
PoE Current Limit (Min) (mA)
Error Amplifier
PD Power Level
PoE Inrush Limit (Typ) (mA)
PoE Standards Supported
Approx. Price (US$)
TPS2379 TPS2378
Auto Retry     Auto Retry    
802.3at type 1/ type 2     802.3at type 1/ type 2    
420     420    
850     850    
No     No    
External Circuit     25W    
140     140    
802.3at type2     802.3at type2    
8SO PowerPAD     8SO PowerPAD    
1.00 | 1ku     0.75 | 1ku    
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