The LM5010ASD/NOPB is a constant on-time non-synchronous Buck Regulator for use with secondary side post regulators. The step-down switching regulator is an enhanced version of the LM5010 with the input operating range extended to 6V minimum. The LM5010Ax features all the functions needed to implement an efficient, buck regulator capable of supplying in excess of 1A load current. This high-voltage regulator integrates an N-channel buck switch. 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 undervoltage lockout, thermal shutdown, gate drive undervoltage lockout and maximum duty cycle limiter.
Integrated high voltage bias regulator
No loop compensation required
Ultrafast transient response
Nearly constant operating frequency with line and load variations
