LA5774-E ON Semiconductor

OrdeOrderirinngg numbe numberr : ENA0742 : ENA0742 LA5774 Monolithic Linear IC Separately-excited Step-down LA5774 Electrical Characteristics at Ta 25 C, V = 3.3V O Ratings Parameter Symbol Conditions Unit min typ max Reference voltage V V = 15V, I = 1.0A 1.235 1.26 1.285 V OS IN O Efficiency V = 15V, I = 1.0A 78 % IN O Switching frequency f V = 15V, I = 1.0A 128 160 192 kHz IN O Line regulation VLINE V = 8 to 20V, I = 1A 40 100 mV O IN O Load regulation VLOAD V = 15V, I = 0.5 to 1.5A 10 30 mV O IN O Output voltage temperature V / Ta Designed target value. * 0.5 mV/ C O coefficient Ripple attenuation factor RREJ f = 100 to 120Hz 45 dB Current limiter operating voltage I V = 15V 3.1 A S IN Thermal shutdown operating TSD Designed target value. * 165 C temperature Thermal shutdown Hysteresis TSD Designed target value. * 15 C width * Design target value: No measurement made. Package Dimensions unit : mm (typ) 3079C Pd max -- Ta 10.0 10.4MAX 4.5 10.0 3.6 8.0 3 1.3 Infinite heat sink jc=5C 1001001.5mm 7.5 3 6.0 50501.5mm 5.6 Al heat sink 4.0 3 mounting 30301.5mm 3.3 torque 0.9 2.7 39Ncm No heat sink 2.0 silicone 1.75 grease 1 5 applied 0.8 4.5 0.45 0 -30-20 0 20 40 60 80 100 120 140 160 (1.6) 1.7 8.4 Ambient temperature, Ta -- C MSG07021 220-5H Pin Assignment (1) V (2) SW (3) GND (4) V (5) SS IN OUT OS No.A0742-2/5 2.7 15.0 (8.8) 17.8 21.3 23.0 Allowable power dissipation, Pd max -- W