LM5070

·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

Distributors for availability and specifications.
V_IN ,RTN to V_EE ....................................................................-0.3V to 80V
RSIG to V_IN ............................................................................-12V to 0V
UVLO to V_EE ........................................................................-0.3V to 57V
UVLORTN .............................................................................-0.3V to 13V
RCLASS, RCLP to V_EE .............................................................-0.3V to 7V
ARTN to RTN .......................................................................-0.3V to 0.3V
V_CC, OUT to ARTN ...............................................................-0.3V to 16V
All other inputs to ARTN ........................................................-0.3V to 7V
ESD Rating
Human Body Model ......................................................................2000V
Storage Temperature ...............................................-65°C to +150°C
Junction Temperature .................................................................150°C
Lead Temperature (Note 2)
Wave (4 seconds) .......................................................................260°C
Infrared (10 seconds) .................................................................240°C
Vapor Phase (75 seconds) ..........................................................219°C

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 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.