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Product details

Parameters

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Package | Pins | Size

TSSOP (PW) 16 22 mm² 5 x 4.4 WSON (NHQ) 16 25 mm² 5 x 5 open-in-new Find other Powered devices

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 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

Packages

  • TSSOP-16
  • WSON-16 (5 mm x 5 mm)

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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.

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Similar but not functionally equivalent to the compared device:
TPS23753A ACTIVE IEEE 802.3-2005 PoE interface and Isolated Converter controller with Enhanced ESD Ride-Through This product integrates the PD & PWM controller and provides more robust protection from unexpected voltage transients (rated to 100V).

Technical documentation

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Type Title Date
* Datasheet LM5070 Integrated Power Over Ethernet PD Interface and PWM Controller datasheet (Rev. G) Mar. 29, 2013
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
User guides AN-1346 LM5070 (Rev. C) May 06, 2013
User guides AN-1358 LM5070 (Rev. A) May 06, 2013

Design & development

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CAD/CAE symbols

Package Pins Download
TSSOP (PW) 16 View options
WSON (NHQ) 16 View options

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