Ordering number : ENA0647A LA5744TP Monolithic Linear IC Separately-Excited Step-Down LA5744TP Electrical Characteristics at Ta = 25C, V = 5V O Ratings Parameter Symbol Conditions Unit min typ max Reference voltage V V = 15V, I = 1.0A 1.20 1.23 1.26 V OS IN O Efficiency V = 15V, I = 1.0A 83 % IN O Switching frequency f V = 15V, I = 1.0A 240 300 360 kHz IN O Line regulation VLINE V = 8 to 20V, I = 1.0A 40 100 mV O IN O Load regulation VLOAD V = 20V, 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) 3332 Pd max -- Ta 1.4 3 Specified board : 114.376.11.6mm 6.5 2.3 glass epoxy 5.0 0.5 1.2 1.1 1 0.8 0.6 0.4 0.6 0.2 (0.65) 1.3 0.5 0.5 1.2 0.22 0.2 12 5 0 --30--20 0 20 40 60 80 100 120 140 Ambient temperature, Ta C SANYO : TP5HFA Pin Assignment (1) V (2) SW (3) GND (4) V (5) SS IN OUT OS No.A0647-2/5 0.8 (5.5) 2.5 1.5 7.0 1.2 Allowable power dissipation, Pd max W