LM5010 Datasheet | National Semiconductor

LM5010 High Voltage 1A Step Down Switching Regulator October 2004 LM5010 High Voltage 1A Step Down Switching Regulator General Description 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 pensation, 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 is set at 1.25A. Additional Features include: VCC under-voltage lockout, 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 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 pensation 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 Typical Applications n n n n High Efficiency Point-Of-Load (POL) Regulator Non-Isolated Telemunications Buck Regulator Secondary High Voltage Post Regulator Automotive Systems Package n LLP-10 (4 mm x 4 mm) n TSSOP-14EP n Both Packages Have Exposed Thermal Pad For Improved Heat Dissipation Basic Stepdown Regulator © 2004 National Semiconductor Corporation DS201199 .national. Connection Diagrams Ordering Information Order Number LM5010SD LM5010SDX LM5010MH LM5010MHX Package Type LLP-10 (4x4) LLP-10 (4x4) TSSOP-14EP TSSOP-14EP NSC Package Drawing SDC10A SDC10A...