LM5010A

www.DataSheet4U.com LM5010A High Voltage 1A Step Down Switching Regulator October 2005 LM5010A High Voltage 1A Step Down Switching Regulator General Description The LM5010A Step Down Switching Regulator is an enhanced version of the LM5010 with the input operating range extended to 6V minimum. The LM5010A features all the functions needed to implement a low cost, efficient, buck regulator capable of supplying in excess of 1A load current. This high voltage regulator integrates an N-Channel Buck Switch, and is available in thermally enhanced LLP-10 and TSSOP-14EP packages. The constant on-time regulation scheme requires no loop compensation resulting in fast load transient response and simplified circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit detection is set at 1.25A. Additional features include: VCC under-voltage lock-out, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter. Features n n n n n n n n n n n n Wide 6V to 75V Input Voltage Range Valley Current Limiting At 1.25A Programmable Switching Frequency Up To 1 MHz Integrated 80V N-Channel Buck Switch Integrated High Voltage Bias Regulator No Loop Compensation Required Ultra-Fast Transient Response Nearly Constant Operating Frequency With Line and Load Variations Adjustable Output Voltage 2.5V, ± 2% Feedback Reference Programmable Soft-Start ...