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    LTC4263 Price and Stock

    Analog Devices Inc LTC4263CS-TRPBF

    IC POE CNTRL 1 CHANNEL 14SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey LTC4263CS-TRPBF Cut Tape 7,438 1
    • 1 $10.22
    • 10 $7.113
    • 100 $5.4149
    • 1000 $4.49654
    • 10000 $4.49654
    		Buy Now
    LTC4263CS-TRPBF Digi-Reel 7,438 1
    • 1 $10.22
    • 10 $7.113
    • 100 $5.4149
    • 1000 $4.49654
    • 10000 $4.49654
    		Buy Now
    LTC4263CS-TRPBF Reel 2,500 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $4.425
    		Buy Now

    Analog Devices Inc LTC4263IDE-TRPBF

    IC POE CNTRL 1 CHANNEL 14DFN
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey LTC4263IDE-TRPBF Cut Tape 6,095 1
    • 1 $11.75
    • 10 $8.247
    • 100 $6.3379
    • 1000 $5.30611
    • 10000 $5.30611
    		Buy Now
    LTC4263IDE-TRPBF Digi-Reel 6,095 1
    • 1 $11.75
    • 10 $8.247
    • 100 $6.3379
    • 1000 $5.30611
    • 10000 $5.30611
    		Buy Now
    LTC4263IDE-TRPBF Reel 2,500 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $5.3
    		Buy Now

    Analog Devices Inc LTC4263IS-TRPBF

    IC POE CNTRL 1 CHANNEL 14SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey LTC4263IS-TRPBF Digi-Reel 4,473 1
    • 1 $11.75
    • 10 $8.247
    • 100 $6.3379
    • 1000 $5.30611
    • 10000 $5.30611
    		Buy Now
    LTC4263IS-TRPBF Cut Tape 4,473 1
    • 1 $11.75
    • 10 $8.247
    • 100 $6.3379
    • 1000 $5.30611
    • 10000 $5.30611
    		Buy Now
    LTC4263IS-TRPBF Reel 2,500 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $5.3
    		Buy Now

    Analog Devices Inc LTC4263CDE-1-TRPBF

    IC POE CNTRL 1 CHANNEL 14DFN
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey LTC4263CDE-1-TRPBF Cut Tape 1,956 1
    • 1 $10.22
    • 10 $7.113
    • 100 $5.4149
    • 1000 $4.49654
    • 10000 $4.49654
    		Buy Now
    LTC4263CDE-1-TRPBF Digi-Reel 1,956 1
    • 1 $10.22
    • 10 $7.113
    • 100 $5.4149
    • 1000 $4.49654
    • 10000 $4.49654
    		Buy Now

    Analog Devices Inc LTC4263CDE-TRPBF

    IC POE CNTRL 1 CHANNEL 14DFN
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey LTC4263CDE-TRPBF Digi-Reel 1,110 1
    • 1 $10.22
    • 10 $7.113
    • 100 $5.4149
    • 1000 $4.49654
    • 10000 $4.49654
    		Buy Now
    LTC4263CDE-TRPBF Cut Tape 1,110 1
    • 1 $10.22
    • 10 $7.113
    • 100 $5.4149
    • 1000 $4.49654
    • 10000 $4.49654
    		Buy Now
    Find more LTC4263 price and stock on Findchips.com

    LTC4263 Datasheets (24)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    LTC4263CDE Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: DFN; No of Pins: 14; Temperature Range: 0°C to +70°C Original PDF
    LTC4263CDE#PBF Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: DFN; No of Pins: 14; Temperature Range: 0°C to +70°C Original PDF
    LTC4263CDE#TR Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: DFN; No of Pins: 14; Temperature Range: 0°C to +70°C Original PDF
    LTC4263CDE#TRPBF Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: DFN; No of Pins: 14; Temperature Range: 0°C to +70°C Original PDF
    LTC4263CDE-1#PBF Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: DFN; No of Pins: 14; Temperature Range: 0°C to +70°C Original PDF
    LTC4263CDE-1#PBF Linear Technology PMIC - Power Over Ethernet (PoE) Controllers, Integrated Circuits (ICs), IC POE 30W SINGLE PSE 14-DFN Original PDF
    LTC4263CDE-1#TRPBF Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: DFN; No of Pins: 14; Temperature Range: 0°C to +70°C Original PDF
    LTC4263CDE-1#TRPBF Linear Technology PMIC - Power Over Ethernet (PoE) Controllers, Integrated Circuits (ICs), IC POE 30W SINGLE PSE 14-DFN Original PDF
    LTC4263CS Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: SO; No of Pins: 14; Temperature Range: 0°C to +70°C Original PDF
    LTC4263CS#PBF Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: SO; No of Pins: 14; Temperature Range: 0°C to +70°C Original PDF
    LTC4263CS#TR Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: SO; No of Pins: 14; Temperature Range: 0°C to +70°C Original PDF
    LTC4263CS#TRPBF Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: SO; No of Pins: 14; Temperature Range: 0°C to +70°C Original PDF
    LTC4263IDE Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: DFN; No of Pins: 14; Temperature Range: -40°C to +85°C Original PDF
    LTC4263IDE#PBF Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: DFN; No of Pins: 14; Temperature Range: -40°C to +85°C Original PDF
    LTC4263IDE#TR Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: DFN; No of Pins: 14; Temperature Range: -40°C to +85°C Original PDF
    LTC4263IDE#TRPBF Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: DFN; No of Pins: 14; Temperature Range: -40°C to +85°C Original PDF
    LTC4263IDE-1#PBF Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: DFN; No of Pins: 14; Temperature Range: -40°C to +85°C Original PDF
    LTC4263IDE-1#PBF Linear Technology PMIC - Power Over Ethernet (PoE) Controllers, Integrated Circuits (ICs), IC POE 30W SINGLE PSE 14-DFN Original PDF
    LTC4263IDE-1#TRPBF Linear Technology Single IEEE 802.3af Compliant PSE Controller with Internal Switch; Package: DFN; No of Pins: 14; Temperature Range: -40°C to +85°C Original PDF
    LTC4263IDE-1#TRPBF Linear Technology PMIC - Power Over Ethernet (PoE) Controllers, Integrated Circuits (ICs), IC POE 30W SINGLE PSE 14-DFN Original PDF

    LTC4263 Datasheets Context Search

    Catalog Datasheet MFG & Type PDF Document Tags

    10mH miniature inductor

    Abstract: dual poe pse injector DE14 LTC4263 LTC4263CDE LTC4263IDE SMAJ58A CAPACITOR 106 25K "Power over Ethernet" "power sourcing equipment"
    Text: LTC4263 Single IEEE 802.3af Compliant PSE Controller with Internal Switch DESCRIPTION FEATURES n n n n n n n n n n n n n IEEE 802 .3af Compliant Operation from a Single 48V Supply Fully Autonomous Operation without Microcontroller Internal MOSFET with Thermal Protection


    Original     		PDF LTC4263 14-Pin 400mA LTC4257-1 LTC4258 LTC4259A-1 LTC4267 4263fd 10mH miniature inductor dual poe pse injector DE14 LTC4263 LTC4263CDE LTC4263IDE SMAJ58A CAPACITOR 106 25K "Power over Ethernet" "power sourcing equipment"

    LTC42631

    Abstract: MPS 1007 300mA transformer 6 pin 18W "Power over Ethernet" "power sourcing equipment"
    Text: LTC4263-1 High Power Single PSE Controller with Internal Switch FEATURES DESCRIPTION n The LTC 4263-1 is a high power, single PSE controller for use in Power over Ethernet systems. The internal current limit and short-circuit protection are designed to provide


    Original     		PDF LTC4263-1 200kHz 400mA 750mA 42631fa LTC42631 MPS 1007 300mA transformer 6 pin 18W "Power over Ethernet" "power sourcing equipment"

    LTC42631

    Abstract: LTC4263-1 han 8 U-M LTC4263 C1214A LTC4263CDE-1 "power sourcing equipment"
    Text: QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1214A SINGLE PORT HIGH POWER POE PSE LTC4263CDE-1 DESCRIPTION Demonstration Circuit 1214A features the LTC4263-1, a high power, single Power Sourcing Equipment PSE controller for use in Power over Ethernet (PoE)


    Original     		PDF LTC4263CDE-1 LTC4263-1, LTC4263-1 LTC42631 han 8 U-M LTC4263 C1214A LTC4263CDE-1 "power sourcing equipment"

    dual poe pse injector

    Abstract: DE14 LTC4263 LTC4263CDE LTC4263IDE SMAJ58A "Power over Ethernet" "power sourcing equipment"
    Text: LTC4263 Single IEEE 802.3af Compliant PSE Controller with Internal Switch DESCRIPTION FEATURES n n n n n n n n n n n n n IEEE 802 .3af Compliant Operation from a Single 48V Supply Fully Autonomous Operation without Microcontroller Internal MOSFET with Thermal Protection


    Original     		PDF LTC4263 14-Pin 400mA LTC4257-1 LTC4258 LTC4259A-1 LTC4267 4263fc dual poe pse injector DE14 LTC4263 LTC4263CDE LTC4263IDE SMAJ58A "Power over Ethernet" "power sourcing equipment"

    JKO-0044

    Abstract: capacitor 155k 100v dual poe pse injector DE14 LTC4263 LTC4263CDE LTC4263IDE SMAJ58A "Power over Ethernet" "power sourcing equipment"
    Text: LTC4263 Single IEEE 802.3af Compliant PSE Controller with Internal Switch DESCRIPTION FEATURES n n n n n n n n n n n n n IEEE 802 .3af Compliant Operation from a Single 48V Supply Fully Autonomous Operation without Microcontroller Internal MOSFET with Thermal Protection


    Original     		PDF LTC4263 14-Pin LTC4257 400mA LTC4257-1 LTC4258 LTC4259A-1 LTC4267 4263fe JKO-0044 capacitor 155k 100v dual poe pse injector DE14 LTC4263 LTC4263CDE LTC4263IDE SMAJ58A "Power over Ethernet" "power sourcing equipment"

    ic 8 pin with number 1 is vss

    Abstract: G0840 Marking code mps "Power over Ethernet" "power sourcing equipment"
    Text: LTC4263 Single IEEE 802.3af Compliant PSE Controller with Internal Switch DESCRIPTION FEATURES • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ IEEE 802 .3af Compliant Operation from a Single 48V Supply Fully Autonomous Operation without Microcontroller


    Original     		PDF LTC4263 200kHz 400mA 4263fb ic 8 pin with number 1 is vss G0840 Marking code mps "Power over Ethernet" "power sourcing equipment"

    Untitled

    Abstract: No abstract text available
    Text: LTC4263-1 High Power Single PSE Controller with Internal Switch FEATURES n n n n n n n n n n n n n DESCRIPTION 30W PSE Output Power IEEE 802 .3af Compatible Operation from a Single 56V Supply Fully Autonomous Operation Without a Microcontroller Internal MOSFET with Thermal Protection


    Original     		PDF LTC4263-1 Miniature14-Pin LTC4259A-1 LTC4263 LTC4264 750mA LTC4267 42631fa

    LTC42631

    Abstract: Marking code mps "Power over Ethernet" "power sourcing equipment" LTC4259A
    Text: LTC4263-1 High Power Single PSE Controller with Internal Switch DESCRIPTION FEATURES • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ The LTC 4263-1 is a high power, single PSE controller for use in Power over Ethernet systems. The internal current limit and short-circuit protection are designed to provide


    Original     		PDF LTC4263-1 200kHz 400mA 750mA 42631f LTC42631 Marking code mps "Power over Ethernet" "power sourcing equipment" LTC4259A

    LTC4263

    Abstract: "power sourcing equipment" "PSE controller"
    Text: QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 981A/B MAIN BOARD, SINGLE PORT AUTONOMOUS PSE / DAUGHTER CARD PSE LTC4263CS/LTC4263CDE DESCRIPTION Demonstration circuits 981A and 981B features the LTC4263 in single port Power Over Ethernet PoE Power Sourcing Equipment (PSE) Midspan and Endpoint solutions. The LTC4263 is an autonomous single-channel PSE controller for use in IEEE802.3af


    Original     		PDF 81A/B LTC4263CS/LTC4263CDE LTC4263 IEEE802 LTC4263. DC981 "power sourcing equipment" "PSE controller"

    LTC4263

    Abstract: 48v linear power supply Signal Conditioning 14pin IC "power sourcing equipment"
    Text: News Release  www.linear.com Single Port Power Over Ethernet Controller Simplifies PSE Design MILPITAS, CA – November 13, 2006 – Linear Technology Corporation introduces the LTC4263, an autonomous single-channel Power Sourcing Equipment PSE controller with an


    Original     		PDF LTC4263, LTC4263 48v linear power supply Signal Conditioning 14pin IC "power sourcing equipment"

    LTC42631

    Abstract: ETH1-230LD LTC4263-1 42631 DE14 10mH 350mA choke dual poe pse injector LTC4263CDE-1 LTC4263IDE datasheet SMAJ58A
    Text: LTC4263-1 High Power Single PSE Controller with Internal Switch FEATURES DESCRIPTION n The LTC 4263-1 is a high power, single PSE controller for use in Power over Ethernet systems. The internal current limit and short-circuit protection are designed to provide


    Original     		PDF LTC4263-1 LTC4259A-1 LTC4263 LTC4264 750mA LTC4267 42631fa LTC42631 ETH1-230LD LTC4263-1 42631 DE14 10mH 350mA choke dual poe pse injector LTC4263CDE-1 LTC4263IDE datasheet SMAJ58A

    ic 8 pin with number 1 is vss

    Abstract: Marking code mps "Power over Ethernet" "power sourcing equipment" LTC4259A
    Text: LTC4263 Single IEEE 803.2af Compliant PSE Controller with Internal Switch DESCRIPTION FEATURES • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ IEEE 802 .3af Compliant Operation from a Single 48V Supply Fully Autonomous Operation without Microcontroller


    Original     		PDF LTC4263 200kHz 400mA 4263f ic 8 pin with number 1 is vss Marking code mps "Power over Ethernet" "power sourcing equipment" LTC4259A

    TDA 0200

    Abstract: LTC4259A
    Text: LTC4263 Single IEEE 802.3af Compliant PSE Controller with Internal Switch DESCRIPTION FEATURES n n n n n n n n n n n n n IEEE 802 .3af Compliant Operation from a Single 48V Supply Fully Autonomous Operation without Microcontroller Internal MOSFET with Thermal Protection


    Original     		PDF LTC4263 14-Pin LTC4257 400mA LTC4257-1 LTC4258 LTC4259A-1 LTC4267 4263fe TDA 0200 LTC4259A

    48v mosfet switch

    Abstract: DE14 LTC4263 LTC4263CDE LTC4263IDE SMAJ58A 580M Marking code mps "Power over Ethernet" "power sourcing equipment"
    Text: LTC4263 Single IEEE 802.3af Compliant PSE Controller with Internal Switch DESCRIPTION FEATURES • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ IEEE 802 .3af Compliant Operation from a Single 48V Supply Fully Autonomous Operation without Microcontroller


    Original     		PDF LTC4263 14-Pin 400mA LTC4257-1 LTC4258 LTC4259A-1 LTC4267 4263fa 48v mosfet switch DE14 LTC4263 LTC4263CDE LTC4263IDE SMAJ58A 580M Marking code mps "Power over Ethernet" "power sourcing equipment"

    ETH1-230LD

    Abstract: ETH1-230L pa1558nl pA1558 PIN DIAGRAM on pad for RJ45 LTC4259A LTC4264 DF1501S SMAJ58A IEEE 802.11n
    Text: LTC4264 High Power PD Interface Controller with 750mA Current Limit DESCRIPTION FEATURES • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Complete High Power PD Interface Controller IEEE 802.3af Compliant Onboard 750mA Power MOSFET Complementary Power Good Outputs


    Original     		PDF LTC4264 750mA 750mA LTC4263-1 LTC4267 400mA 200kHz 4264f ETH1-230LD ETH1-230L pa1558nl pA1558 PIN DIAGRAM on pad for RJ45 LTC4259A LTC4264 DF1501S SMAJ58A IEEE 802.11n

    340 opto isolator

    Abstract: adapter 12v,2A 5V,2A kelvin 1102 HD01 LTC4269-1 LTC4269C-1 LTC4269CDKD-1 LTC4269I-1 LTC4269IDKD-1 PA1558NL
    Text: LTC4269-1 IEEE 802.3at PD with Synchronous No-Opto Flyback Controller DESCRIPTION FEATURES n n n n n n n n n n n n The LTC 4269-1 is an integrated Powered Device PD controller and switching regulator intended for high power IEEE 802.3at and 802.3af applications. The


    Original     		PDF LTC4269-1 LTC4269-1 LTC4268-1 750mA LTC4269-2 100kHz 500kHz 42691fb 340 opto isolator adapter 12v,2A 5V,2A kelvin 1102 HD01 LTC4269C-1 LTC4269CDKD-1 LTC4269I-1 LTC4269IDKD-1 PA1558NL

    ETH1-230L

    Abstract: LTC4269CDKD-2 window regulator LTC4269-2 LTC4269C-2 LTC4269I-2 LTC4269IDKD-2 TLV431 mps 0522 step up DC DC 5v converter out 12V
    Text: LTC4269-2 IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support Description Features n n n n n n n n n n n 25.5W IEEE 802.3at Compliant Type-2 PD PoE+ 2-Event Classification IEEE 802.3at High Power Available Indicator Integrated State-of-the-Art Synchronous Forward


    Original     		PDF LTC4269-2 100kHz 500kHz 200KHz 300kHz LTC4268-1 750mA 50kHz 250kHz LTC4269-1 ETH1-230L LTC4269CDKD-2 window regulator LTC4269-2 LTC4269C-2 LTC4269I-2 LTC4269IDKD-2 TLV431 mps 0522 step up DC DC 5v converter out 12V

    K1A 494

    Abstract: No abstract text available
    Text: LTC4278 IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support DESCRIPTION FEATURES n n n n n n n n n n n n n 25.5W IEEE 802.3at Compliant Type 2 PD 10V to 57V Auxiliary Power Input Shutdown Pin for Flexible Auxiliary Power Support


    Original     		PDF LTC4278 Pro00V 400mA 300kHz LTC4269-1 LTC4269-2 4278fc K1A 494

    Untitled

    Abstract: No abstract text available
    Text: LTC4267-1 Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator DESCRIPTIO FEATURES • ■ ■ ■ ■ ■ ■ ■ ■ U ■ Complete Power Interface Port for IEEE 802 .3af Powered Device PD Onboard 100V, UVLO Switch Precision Dual Level Inrush Current Limit


    Original     		PDF LTC4267-1 16-Pin LTC4267 400mA 200kHz 42671f

    i2c/poe pse

    Abstract: LTC4271 "power sourcing equipment"
    Text: LTC4290/LTC4271 8-Port PoE/PoE+/LTPoE+ PSE Controller Features Description Eight Independent PSE Channels n Compliant with IEEE 802.3at Type 1 and 2 n Chipset Provides Electrical Isolation Reduced BOM Cost Eliminates up to 6 High Speed Opto-Couplers Eliminates Isolated 3.3V Power Supply


    Original     		PDF LTC4290/LTC4271 40-Lead LTC4290) 24-Leification, 100kHz 500kHz, 50kHz 250kHz, 429071fa com/LTC4290 i2c/poe pse LTC4271 "power sourcing equipment"

    LTC3825

    Abstract: PA2467NL PE-68386 HD01 LTC4264 LTC4265 LTC4265C LTC4265CDE LTC4265I LTC4265IDE
    Text: LTC4265 IEEE 802.3at High Power PD Interface Controller with 2-Event Classification Recognition FEATURES DESCRIPTION n The LTC 4265 is a 3rd generation Powered Device PD Interface controller intended for IEEE 802.3at high power Power-over-Ethernet (PoE) applications up to 25.5W. By


    Original     		PDF LTC4265 LTC4265 100mA theLTC4267-1 LTC4267-3 400mA 200KHz 300KHz LTC4268-1 LTC3825 PA2467NL PE-68386 HD01 LTC4264 LTC4265C LTC4265CDE LTC4265I LTC4265IDE

    LT6210

    Abstract: LT6211 LT6211CDD LT6211CMS LT6211IDD
    Text: LT6210/LT6211 Single/Dual Programmable Supply Current, R-R Output, Current Feedback Amplifiers FEATURES DESCRIPTION n The LT 6210/LT6211 are single/dual current feedback amplifiers with externally programmable supply current and bandwidth ranging from 10MHz at 300 A per amplifier to 200MHz at 6mA per amplifier. They feature a low


    Original     		PDF LT6210/LT6211 6210/LT6211 10MHz 200MHz 00V/s LT6210/LT6211 ISETT1397 400MHz, LT1398/LT1399 LT6210 LT6211 LT6211CDD LT6211CMS LT6211IDD

    LTC1461

    Abstract: LTC2205IUK-14#PBF LTC2204 LTC2205-14 LTC2206 LTC2206-14 LTC2207 LTC2207-14
    Text: LTC2205-14 14-Bit, 65Msps ADC FEATURES DESCRIPTION n The LTC 2205-14 is a sampling 14-bit A/D converter designed for digitizing high frequency, wide dynamic range signals up to input frequencies of 700MHz. The input range of the ADC can be optimized with the PGA front end.


    Original     		PDF LTC2205-14 14-Bit, 65Msps 14-bit 700MHz. 65Msps 25VP-P 140MHz 700MHz LTC1461 LTC2205IUK-14#PBF LTC2204 LTC2205-14 LTC2206 LTC2206-14 LTC2207 LTC2207-14

    TRANSISTOR BEL 187

    Abstract: "power sourcing equipment"
    Text: LTC4278 IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support DESCRIPTION FEATURES n n n n n n n n n n n n n The LTC 4278 is an integrated Powered Device PD controller and switching regulator intended for high power IEEE 802.3at and 802.3af applications. With a wide input


    Original     		PDF LTC4278 750mA LTC4267-1 LTC4267-3 LTC4269-1 LTC4269-2 4278fb TRANSISTOR BEL 187 "power sourcing equipment"