Features Fully Compliant 802.3af Power Interface Port 80V, 1, 400 mA Internal MOSFET Programmable Inrush Current Limit Detection Resistor Disconnect Function Programmable Classification Current Programmable Under-voltage Lockout with Programmable Hysteresis Thermal Shutdown Protection Current Mode Pulse Width Modulator Supports both Isolated and Non-Isolated Applications Error Amplifier and Reference for Non-Isolated Applications Programmable Oscillator Frequency Programmable Soft-start 80% Maximum Duty Cycle Limiter, Slope Compensation (-80 device) 50% Maximum Duty Cycle Limiter, No Slope Compensation (-50 device) 800 mA Peak Gate Driver Description The LM5070 power interface port and pulse width modulation (PWM) controller provides a complete integrated solution for Powered Devices (PD) that connect into Power over Ethernet (PoE) systems. The LM5070 integrates an 80V, 400mA line connection switch and associated control for a fully IEEE 802.3af compliant interface with a full featured current mode pulse width modulator dc-dc converter. All power sequencing requirements between the controller interface and switch mode power supply (SMPS) are integrated into the IC. Two options are available providing either an 80% maximum duty cycle limit with slope compensation (on the -80 suffix) device or a 50% maximum duty cycle limit and no slope compensation on the (-50 suffix) device.

Also Recommended LM3411 Feedback Control / Optocoupler Driver For Isolated Supplies LM5071▲ Compatible With Auxilary Power Sources, Such As 12 V AC Adapters LM5072▲ Higher Transient Voltages (100V), Supplies More Current (750mA) And Compatible With Auxiliary Power

Typical Application *click for larger image	Block Diagram *click for larger image
Typical Performance click for larger image

Parameters / Values	LM5070	LM5071	LM5072
Input Min Voltage	1.8 Volt	9.5 Volt	9 Volt
Input Max Voltage	75 Volt	60 Volt	100 Volt
Frequency Min	50 kHz	50 kHz	50 kHz
Frequency Max	1000 kHz	1000 kHz	1000 kHz
Reference Accuracy (+/-)	2.0 %	2 %	2 %
Current Draw with AUX Winding (typ)	0.7 mA	0.7 mA	0.7 mA
Special Features	Fully compliant IEEE 802.3af PD interface, error amplifier for non-isolated designs, leading edge blanking, high current gate drive	Auxiliary power interface, Fully compliant IEEE 802.3af PD interface, Error amplifier for non-isolated designs, leading edge blanking, high current gate drive	100V PD hot swap MOSFET, adjustable DC current limit, Auxiliary power interface
On/Off Pin	Yes	Yes	Yes
PowerGood / Error Flag	No	Yes	Yes
Adjustable Output	Yes	Yes	Yes
Output Min	1.25 Volt	1.25 Volt	1.25 Volt
Output Range	1.25V and above	1.25 and above	1.25V and above
Output Power	13 Watt	13 Watt	25 Watt
Adj Switch Frequency	Yes	Yes	Yes
Efficiency (peak)	90.5 %	90.5 %	90.5 %
Topology	Single Ended	Single Ended	Single Ended
Flyback	Yes	Yes	Yes
Inverting	Yes	Yes	Yes
Step-Up	Yes	Yes	Yes
Step-Down	Yes	Yes	Yes
RegType	Switching Controller	Switching Controller	Switching Controller
Temperature Min	-40 deg C	-40 deg C	-40 deg C
Temperature Max	125 deg C	125 deg C	125 deg C
PowerWise	Yes	Yes	Yes

Datasheets

Title		Size	Date	Other Language
	LM5070 Integrated Power Over Ethernet PD Interface and PWM Controller	840 Kbytes	4-Apr-06

Application Notes

Title		Size	Date	Other Language
	AN-1346: Application Note 1346 LM5070 'HE' Evaluation Board	550 Kbytes	13-Mar-06	中文
	AN-1358: Application Note 1358 LM5070 'AE' Evaluation Board	787 Kbytes	27-Jan-05
	AN-1408: Application Note 1408 Designing Power Over Ethernet Using LM5070 and DP83865	1553 Kbytes	23-Nov-11	中文
	AN-1474: Application Note 1474 The LM507X Family of PoE Devices: Frequently Asked Questions (FAQs)	457 Kbytes	10-May-06	中文

Other Technical Documents

Title		Type	Date
	Power Supply Design for Power-over-Ethernet Applications	Power Designer	2007-03-22
	Auxiliary Power Extends PoE Applications	Technology Edge	2006-04-01

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM5070MTC-50/NOPB LM5070MTC-50 RoHS Status	TSSOP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1130 AVNET-EM Worldwide 100 DIGI-KEY Worldwide 841 FARNELL Europe and Asia 508 MOUSER Worldwide 201 NEWARK Americas 242 TAYLOR Americas 1130	$1.45 each at 1K+ pcs	rail of 92
LM5070MTC-80/NOPB LM5070MTC-80 RoHS Status	TSSOP	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 252 DIGI-KEY Worldwide 520 FARNELL Europe and Asia 33 NEWARK Americas 74	$1.45 each at 1K+ pcs	rail of 92
LM5070MTCX-50/NOPB LM5070MTCX-50 RoHS Status	TSSOP	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 5000 DIGI-KEY Worldwide 0 TECHMOSA Asia Pacific 2500	$1.45 each at 1K+ pcs	reel of 2500
LM5070MTCX-80/NOPB RoHS Status	TSSOP	Full production Lead Time: 8 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$1.45 each at 1K+ pcs	reel of 2500
LM5070SD-50/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 1000 DIGI-KEY Worldwide 3874 MOUSER Worldwide 1000	$1.45 each at 1K+ pcs	reel of 1000
LM5070SD-80/NOPB LM5070SD-80 RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$1.45 each at 1K+ pcs	reel of 1000
LM5070SDX-50/NOPB LM5070SDX-50 RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$1.45 each at 1K+ pcs	reel of 4500
LM5070SDX-80/NOPB LM5070SDX-80 RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$1.45 each at 1K+ pcs	reel of 4500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM5070.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM5070 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM5070AE EVAL	Integrated Power Over Ethernet PD Interface and PWM Controller	Full production	Distributor Region Qty DIGI-KEY Worldwide 0	$101.00 each	1
LM5070 Integrated Power Over Ethernet PD Interface and PWM Controller Features: Fully compliant 802.3af Power Interface Port 80V 1Ω, 400 mA Internal MOSFET Programmable Inrush Current Limit Detection Resistor Disconnect Function Programmable Classification Current Programmable Under-voltage Lockout with Programmable Hysteresis Thermal Shutdown Protection Current Mode Pulse Width Modulator Supports both Isolated and Non-Isolated Applicatins Error Amplifier and Reference for Non-Isolated Applications Programmable Oscillator Frequency Programmable Soft-start 80% Maximum Duty Cycle Limiter, Slope Compensation (-80 device) 50% Maximum Duty Cycle Limiter, No Slope Compensation (-50 device) 800 mA Peak Gate Driver Contents: A fully assembled LM5070AE evaluation board LM5070 datasheet LM5070 eval board appnote

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM5070HE EVAL	Integrated Power Over Ethernet PD Interface and PWM Controller	Full production	Distributor Region Qty DIGI-KEY Worldwide 0	$120.00 each	1
LM5070 Integrated Power Over Ethernet PD Interface and PWM Controller Features: Fully Compliant 802.3af Power Interface Port 80V 1Ω, 400 mA Internal MOSFET Programmable Inrush Current Limit Detection Resistor Disconnect Function Programmable Classification Current Programmable Under-voltage Lockout with Programmable Hysteresis Thermal Shutdown Protection Current Mode Pulse Width Modulator Supports both Isolated and Non-Isolated Applicatins Error Amplifier and Reference for Non-Isolated Applications Programmable Oscillator Frequency Programmable Soft-start 80% Maximum Duty Cycle Limiter, Slope Compensation (-80 device) 50% Maximum Duty Cycle Limiter, No Slope Compensation (-50 device) 800 mA Peak Gate Driver Contents: A fully assembled LM5070 evaluation board LM5070 datasheet LM5070 eval board appnote

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM5070MTC-50/NOPB LM5070MTC-50	56.74 57	TSSOP	16	1 1	260 260	Detail	Download	spice file	NSUZXYTT 5070M TC-50
LM5070MTC-80/NOPB LM5070MTC-80	56.74 57	TSSOP	16	1 1	260 260	Detail	Download	spice file	NSUZXYTT 5070M TC-80
LM5070MTCX-50/NOPB LM5070MTCX-50	56.74 57	TSSOP	16	1 1	260 260	Detail	Download	spice file	NSUZXYTT 5070M TC-50
LM5070MTCX-80/NOPB	56.74	TSSOP	16	1	260	Detail	Download	spice file	NSUZXYTT 5070M TC-80
LM5070SD-50/NOPB	64.927	LLP	16	1	260	Detail	Download	spice file	NS UZXYTT L00051B
LM5070SD-80/NOPB LM5070SD-80	64.927 65.192	LLP	16	1 1	260 260	Detail	Download	spice file	NS UZXYTT L00052B
LM5070SDX-50/NOPB LM5070SDX-50	64.927 65.192	LLP	16	1 1	260 260	Detail	Download	spice file	NS UZXYTT L00051B
LM5070SDX-80/NOPB LM5070SDX-80	64.927 65.192	LLP	16	1 1	260 260	Detail	Download	spice file	NS UZXYTT L00052B

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM5070.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM5070 is located at RoHS Status.

CAD Symbols and Models Download LM5070 CAD Symbols

Models spice file

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM5070MTC-50	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5070MTC-80	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5070MTCX-50	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5070MTCX-80	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5070SD-50	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5070SD-80	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5070SDX-50	ABCD150XV1	0	3868	0	0	2595000	2	736338335
LM5070SDX-80	ABCD150XV1	0	3868	0	0	2595000	2	736338335

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM5070.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM5070 is located at RoHS Status.

Power Supply Design for Power over Ethernet Powered Devices Click image to play video in new window

Power Supply Design for Power over Ethernet Powered Devices Date: 2004-10-20 Length: 00:60:00