LM3075

LM3075 High Efficiency, Synchronous Current Mode Buck Controller September 2005 LM3075 High Efficiency, Synchronous Current Mode Buck Controller General Description The LM3075 is a current mode control, synchronous buck controller IC. Use of synchronous rectification and pulseskipping operation at light load achieves high efficiency over a wide load range. Fixed frequency operation can be obtained by disabling the pulse-skipping mode. Current mode control assures excellent line and load regulation and a wide loop bandwidth for fast response to load transients. www.DataSheet4U.com Current mode control can be achieved by either sensing across the high side NFET or a sense resistor. The switching frequency can be selected as either 200 kHz or 300 kHz from an internal clock. The LM3075 is available with an adjustable output in a TSSOP-20 package. Features n n n n n Input voltage range of 4.5V-36V Current Mode Control Skip mode operation available Cycle by cycle current limit 1.24V ± 2% Reference Applications n Automotive Power Supplies n Distributed Power Systems Typical Application Circuit 20162301 © 2005 National Semiconductor Corporation DS201623 www.national.com LM3075 Connection Diagram TOP VIEW 20162302 20-Lead TSSOP (MTC) Ordering Information Order Number LM3075MTC www.DataSheet4U.com LM3075MTCX Package Type TSSOP-20 TSSOP-20 NSC Package Drawing MTC-20 MTC-20 Supplied As 73 Units per Anti-Static Tube 2500 Units on Tape and Reel Pin Descriptions LM3075 Pin # ...