LM5116-HT

LM5116-HT www.ti.com SLVSBS8B – OCTOBER 2013 – REVISED JANUARY 2014 WIDE RANGE SYNCHRONOUS BUCK CONTROLLER Check for Samples: LM5116-HT FEATURES 1 2 Emulated Peak Current Mode Wide Operating Range Up to 80 V Low IQ Shutdown (< 10 µA) Drives Standard or Logic Level MOSFETs Robust 3.5-A Peak Gate Drive Free-Run or Synchronous Operation to 1 MHz Optional Diode Emulation Mode Programmable Output from 1.215 V to 80 V Precision 1.5% Voltage Reference Programmable Current Limit Programmable Soft-Start Programmable Line Under-Voltage Lockout Automatic Switch to External Bias Supply APPLICATIONS Down-Hole Drilling High Temperature Environments SUPPORTS EXTREME TEMPERATURE APPLICATIONS Controlled Baseline One Assembly and Test Site One Fabrication Site Available in Extreme (–55°C to 175°C) Temperature Range Extended Product Life Cycle Extended Product-Change Notification Product Traceability Texas Instruments' high temperature products utilize highly optimized silicon (die) solutions with design and process enhancements to maximize performance over extended temperatures. DESCRIPTION The LM5116 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 by cycle current limiting and ease of loop compensation. The us...