LM5117

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM5117, LM5117-Q1 SNVS698F – APRIL 2011 – REVISED AUGUST 2015 LM5117/Q1 Wide Input Range Synchronous Buck Controller with Analog Current Monitor 1 Features 1 LM5117-Q1 is Qualified for Automotive Applications AEC-Q100 Qualified With the Following Results: – Device Temperature Grade 1: -40°C to 125°C Ambient Operating Temperature Range Emulated Peak Current Mode Control Wide Operating Range from 5.5 V to 65 V Robust 3.3-A Peak Gate Drives Adaptive Dead-Time Output Driver Control Free-Run or Synchronizable Clock up to 750 kHz Optional Diode Emulation Mode Programmable Output from 0.8 V Precision 1.5% Voltage Reference Analog Current Monitor Programmable Current Limit Hiccup Mode Overcurrent Protection Programmable Soft-Start and Tracking Programmable Line Undervoltage Lockout Programmable Switchover to External Bias Supply Thermal Shutdown 2 Applications Automotive Infotainment Industrial DC-DC Motor Drivers Automotive USB Power Telecom Server 3 Description The LM5117 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-bycycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces n...