LM5010

·Input Voltage Range: 8V to 75V
·Valley Current Limit At 1.25A
·Switching Frequency Can Exceed 1 MHz
·Integrated N-Channel Buck Switch
· Integrated Startup Regulator
·No Loop Compensation Required
·Ultra-Fast Transient Response
· Operating Frequency Remains Constant With Load and Line Variations
· Maximum Duty Cycle Limited During Startup
·Adjustable Output Voltage
· Precision 2.5V Feedback Reference
·Thermal shutdown

·High Efficiency Point-Of-Load (POL) Regulator
·Non-Isolated Telecommunications Buck Regulator
·Secondary High Voltage Post Regulator
· Automotive Systems

V_IN to GND .............................................................76V
BST to GND .............................................................90V
SW to GND (Steady State) ...................................-1.5V
BST to V_CC ..............................................................76V
BST to SW ...............................................................14V
V_CC to GND .............................................................14V
S_GND to RTN ...........................................-0.3V to +0.3V
SS to RTN ....................................................-0.3V to 4V
V_IN to SW ...............................................................76V
Current Out of I_SEN .........................................See Text
All Other Inputs to GND .................................-0.3 to 7V
ESD Rating (Note 2)
Human Body Model .................................................2kV
Storage Temperature Range ...........-55°C to +150°C
Lead Temperature (Soldering 4 sec) (Note 4) ...260°C

The LM5010 Step Down Switching Regulator features all the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying in excess of 1A load current. This high voltage regulator contains an N-Channel Buck Switch, and is available in thermally enhanced LLP-10 and TSSOP-14EP packages. The hysteretic regulation scheme requires no loop compensation, results in fast load transient response, and simplifies 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 set at 1.25A. Additional features include: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.