LA5744

Ordering number : ENA0717C LA5744 Monolithic Linear IC Separately-Excited Step-Down Switching Regulator (Variable Type) http://onsemi.com Overview The LA5744 is a separately-excited step-down switching regulator (variable type). Functions High efficiency. Time-base generator (300kHz) incorporated. Current limiter incorporated. Thermal shutdown circuit incorporated. Soft start circuit incorporated. Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Input voltage Maximum output current SW pin application reverse voltage Allowable power dissipation VIN IO max VSW Pd max1 No heat sink Pd max2 Infinite heat sink Operating temperature Topr Storage temperature Tstg Junction temperature Tj max * Specified circuit board : 76.1×114.3×1.6mm3 : Copper foil ratio 60% FR4 Ratings 30 3 -1 1.75 7.5 -30 to +125 -40 to +150 150 Unit V A V W W °C °C °C Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Recommended Operating Conditions at Ta = 25°C Parameter Input voltage range Symbol VIN Conditions Ratings 4.5 to 28 Unit V Semiconductor Components Industries, LLC, 2013 August, 2013 52307 MS PC 20070522-S00004 / 42507 MS PC / 31407 MS PC / 30707 MS PC No.A0717-1/5 LA5744 Electrical Characteristics at Ta =...