SM72485 Datasheet | National Semiconductor

Description The SM72485 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, Buck bias regulator. This high voltage regulator contains an 100 V N-Channel Buck Switch. The device is easy to implement and is provided in the MSOP-8 and the thermally enhanced LLP-8 package. The regulator is based on a control scheme using an ON time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant. The control scheme requires no loop pensation. An intelligent current limit is implemented with forced OFF time, which is inversely proportional to Vout. This scheme ensures short circuit control while providing minimum foldback. Other features include: Thermal Shutdown, VCC under-voltage lockout, Gate drive under-voltage lockout, Max Duty Cycle limiter, and a pre-charge switch. - Operating frequency remains constant with varying line - - - - - - voltage and load current Adjustable output voltage from 2.5V Highly efficient operation Precision internal reference Low bias current Intelligent current limit Thermal shutdown Typical Applications - - - - PV Panel Smart Junction Boxes Non-Isolated Telemunication Buck Regulator Secondary High Voltage Post Regulator +42V Automotive Systems Features - - - - - - - Renewable Energy Grade Operating input voltage range: 6V to 95V Integrated 100V, N-Channel buck switch Internal start-up regulator No loop pensation required Ultra-Fast transient response On time varies inversely with input voltage Package - MSOP - 8 - LLP - 8 (4mm x 4mm) .Data Sheet.net/ Typical Application, Basic Step-Down Regulator © 2011 National Semiconductor Corporation .national. Datasheet pdf - http://..co.kr/ Connection Diagrams Top View 8-Lead MSOP Top View 8-Lead LLP Ordering Information Order Number SM72485SDE SM72485SD SM72485SDX SM72485MME SM72485MM SM72485MMX MSOP-8 MUA08A 2485 LLP-8 SDC08A S2485 Package Type NSC...