8050SD

1-1-2 Switching Mode Regulator ICs SI-8000SD Series ■Features Surface-mount package (TO263-5) Output current: 3.0A Surface Mount, Separate Excitation Step-down Switching Mode Regulator ICs ■Lineup Part Number VO (V) IO (A) SI-8033SD 3.3 3 SI-8050SD 5.0 High efficiency: 79% typ. (SI-8033SD), 84% typ. (SI-8050SD) Requires only 4 discrete external components Internally-adjusted phase correction and output voltage Built-in reference oscillator (60kHz) Built-in overcurrent and thermal protection circuits Output ON/OFF available Soft start available by S.S pin ■Absolute Maximum Ratings Parameter DC Input Voltage Power Dissipation*2 Junction Temperature Storage Temperature Thermal Resistance (Junction to Case) Thermal Resistance (Junction to Ambient Air) Symbol VIN PD Tj Tstg Ratings 43*1 3 +125 –40 to +125 3 33.3 Unit V W °C °C °C/W °C/W When mounted on glass-epoxy board 40 × 40 mm (copper area: 100%) When mounted on glass-epoxy board 40 × 40 mm (copper area: 100%) Conditions θ j-c θ j-a ■Applications Power supplies for telecommunication equipment Onboard local power supplies *1: 35V for SI-8033SD *2: Limited by thermal protection circuit. ■Recommended Operating Conditions Ratings Parameter DC Input Voltage Range Output Current Range* Operating Junction Temperature Range Operating Temperature Range* Symbol VIN1 IO Tjop Top SI-8033SD 5.5 to 28 0 to 3.0 –30 to +125 –30 to +125 SI-8050SD 7 to 40 Unit V A °C °C *: Limited by Ta-PD characteristics. ■Elect...