LM5085 - Texas Instruments

LM5085 PFET Buck Switching Controller

The LM5085 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5-V to 75-V input range. The constant on-time regulation .

Features

•1 LM5085-Q1 is an Automotive Grade Product that is AEC-Q100 Grade 1 Qualified (
  –40°C to 125°C Operating Junction Temperature)
• Wide 4.5-V to 75-V Input Voltage Range
• Adjustable Current Limit Using RDS(ON) or a Current Sense Resistor
• Programmable Switching Frequency to 1MHz
• No Loop Compensation Required
• Ultra-Fast Transient Response
• Nearly Constant Operating Frequency with Line and Load Variations
• Adjustable Output Voltage from 1.25 V
• Precision ±2% Feedback Reference
• Capable of 100% Duty Cycle Operation
• Internal Soft-start Timer
• Integrated High Voltage Bias Regulator
• The.