LTC4279IUFD#PBF
ActiveSINGLE PORT POE/POE+/LTPOE++ PSE CONTROLLER
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LTC4279IUFD#PBF
ActiveSINGLE PORT POE/POE+/LTPOE++ PSE CONTROLLER
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | LTC4279IUFD#PBF |
|---|---|
| Auxiliary Sense | False |
| Current - Supply | 1.7 mA |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Number of Channels | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 20-WFQFN Exposed Pad |
| Power - Max [Max] | 90 W |
| Standards | LTPoE++, 802.3at, 802.3af |
| Supplier Device Package | 20-QFN (4x5) |
| Type | Controller (PSE) |
| Voltage - Supply [Max] | 57 V |
| Voltage - Supply [Min] | 45 V |
LTC4279 Series
Single Port PoE/PoE+/LTPoE++ PSE Controller
| Part | Mounting Type | Operating Temperature [Max] | Operating Temperature [Min] | Auxiliary Sense | Number of Channels | Supplier Device Package | Internal Switch(s) | Current - Supply | Type | Power - Max [Max] | Package / Case | Package / Case [x] | Package / Case [y] | Voltage - Supply [Min] | Voltage - Supply [Max] | Standards |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices | Surface Mount | 85 °C | -40 °C | 1 | 16-SO | 1.7 mA | Controller (PSE) | 90 W | 16-SOIC | 0.154 in | 3.9 mm | 45 V | 57 V | 802.3af 802.3at LTPoE++ | ||
Analog Devices | Surface Mount | 85 °C | -40 °C | 1 | 20-QFN (4x5) | 1.7 mA | Controller (PSE) | 90 W | 20-WFQFN Exposed Pad | 45 V | 57 V | 802.3af 802.3at LTPoE++ |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 11.51 | |
| 10 | $ 8.07 | |||
| 25 | $ 7.18 | |||
| 100 | $ 6.19 | |||
| 250 | $ 5.71 | |||
| 500 | $ 5.42 | |||
| 1000 | $ 5.18 | |||
Description
General part information
LTC4279 Series
The LTC4279 is an autonomous single port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1, Type 2 and LTPoE++ compliant Power over Ethernet (PoE) systems. The LTC4279 provides fully autonomous IEEE 802.3 and LTPoE++ compliant operation without a microcontroller. The LTC4279 simplifies PSE implementation, requiring only a single supply and a small number of passive support components.The LTC4279 delivers lowest-in-industry heat dissipation by utilizing a low-RDS(ON)external MOSFET and a 0.1Ω sense resistor, eliminating the need for expensive heat sinks and increasing efficiency.PD discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection. Midspan PSEs are supported with physical layer classification and a 2.5 second backoff timer.Legacy and custom PDs are supported with pin-selectable LEGACY and UltraPWR modes. LEGACY mode detects and powers pre-IEEE specification PDs. UltraPWR mode aggressively turns on and powers custom PDs requiring high inrush and/or operational currents.ApplicationsPoE PSE Endpoints (Switch/Router)PoE Midspan Power InjectorsPower ForwardersFemto CellsSecurity Systems
Documents
Technical documentation and resources