LTC4270CIUKG#PBF
ActivePOWER OVER ETHERNET PSE CONTROLLER 3V 3.6V 13W 52-PIN QFN EP
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LTC4270CIUKG#PBF
ActivePOWER OVER ETHERNET PSE CONTROLLER 3V 3.6V 13W 52-PIN QFN EP
Technical Specifications
Parameters and characteristics for this part
| Specification | LTC4270CIUKG#PBF |
|---|---|
| Auxiliary Sense | False |
| Current - Supply | 9 mA |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Number of Channels [custom] | 12 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 52-WFQFN Exposed Pad |
| Power - Max [Max] | 13 W |
| Standards | LTPoE++, 802.3at, 802.3af |
| Supplier Device Package | 52-QFN (7x8) |
| Type | Controller (PSE) |
| Voltage - Supply [Max] | 57 V |
| Voltage - Supply [Min] | 45 V |
LTC4270 Series
| Part | Supplier Device Package | Number of Channels [custom] | Current - Supply | Standards | Package / Case | Operating Temperature [Max] | Operating Temperature [Min] | Voltage - Supply [Min] | Voltage - Supply [Max] | Type | Mounting Type | Internal Switch(s) | Power - Max [Max] | Auxiliary Sense |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices | 52-QFN (7x8) | 12 | 9 mA | 802.3af 802.3at LTPoE++ | 52-WFQFN Exposed Pad | 85 °C | -40 °C | 45 V | 57 V | Controller (PSE) | Surface Mount | 90 W | ||
Analog Devices | 52-QFN (7x8) | 12 | 9 mA | 802.3af 802.3at LTPoE++ | 52-WFQFN Exposed Pad | 85 °C | -40 °C | 45 V | 57 V | Controller (PSE) | Surface Mount | 13 W | ||
Analog Devices | 52-QFN (7x8) | 12 | 9 mA | 802.3af 802.3at LTPoE++ | 52-WFQFN Exposed Pad | 85 °C | -40 °C | 45 V | 57 V | Controller (PSE) | Surface Mount | 90 W | ||
Analog Devices | 52-QFN (7x8) | 12 | 9 mA | 802.3af 802.3at LTPoE++ | 52-WFQFN Exposed Pad | 85 °C | -40 °C | 45 V | 57 V | Controller (PSE) | Surface Mount | 25.5 W | ||
Analog Devices | 52-QFN (7x8) | 12 | 9 mA | 802.3af 802.3at LTPoE++ | 52-WFQFN Exposed Pad | 85 °C | -40 °C | 45 V | 57 V | Controller (PSE) | Surface Mount | 90 W |
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 | $ 24.25 | |
| 10 | $ 17.85 | |||
| 25 | $ 16.21 | |||
| 100 | $ 14.38 | |||
| 250 | $ 13.49 | |||
| 500 | $ 13.34 | |||
Description
General part information
LTC4270 Series
The LTC4270/LTC4271chipset is a 12-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1 and Type 2 (high power) compliant Power over Ethernet (PoE) systems. Transformer-isolated communication protocol replaces expensive opto-couplers and complex isolated 3.3V supply resulting in significant BOM cost savings. The LTC4270/LTC4271 chipset delivers lowest-in-industry heat dissipation by utilizing low-RDS(ON)external MOSFETs and 0.25Ω sense resistors.Advanced power management features include per-port 12‑bit current monitoring ADCs, DAC-programmable current limit, and versatile fast shut-down of preselected ports. Advanced power management host software is available under a no-cost license. PD discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection. Midspan PSEs are supported with 2-event classification and a 2 second backoff timer. The LTC4270/LTC4271 includes an I2C serial interface operable up to 1MHz.The LTC4270/LTC4271 is available in multiple power grades allowing delivered PD power up to 90W.APPLICATIONSPoE PSE Switches/RoutersPoE PSE Midspans
Documents
Technical documentation and resources