1-1-3 DC/DC Converter ICs SI-8000E Series Full-Mold, Separate Excitation Step-down Switching Mode ■Features ■Lineup • Compact full-mold package (equivalent to TO220) Part Number SI-8050E VO(V) 5.0 IO(A) 0.6 • High efficiency: 80% • Requires only 4 discrete components • Internally-adjusted phase correction and output voltage ■Absolute Maximum Ratings Parameter • Built-in reference oscillator (60kHz) DC Input Voltage • Built-in overcurrent and thermal protection circuits Power Dissipation ■Applications • Power supplies for telecommunication equipment Symbol Ratings VIN 43 V PD1 14(With infinite heatsink) W PD2 Unit 1.5(Without heatsink, stand-alone operation) W Junction Temperature Tj +125 Storage Temperature Tstg –40 to +125 °C Thermal Resistance(junction to case) θ j-c 7.0 °C/W Thermal Resistance(junction to ambient air) θ j-a 66.7 °C/W °C • Onboard local power supplies ■Recommended Operating Conditions Ratings Parameter Symbol Unit SI-8050E DC Input Voltage Range VIN 7 to 40 Output Current Range IO 0 to 0.6 V A Operating Junction Temperature Range Tjop –30 to +125 °C Operating Temperature Range Top –30 to +125 °C ■Electrical Characteristics (Ta=25°C) Ratings Parameter SI-8050E Symbol VO Output Voltage min. 4.80 Conditions Load Regulation Temperature Coefficient of Output Voltage Overcurrent Protection Starting Current 32 ICs Conditions % kHZ VIN=20V, IO=0.3A 80 Conditions 100 mV VIN=10 to 30V, IO=0.3A 30 ∆VOLOAD Conditions VIN=20V, IO=0.1 to 0.4A ∆VO/∆Ta IS1 V 60 ∆VOLINE Conditions 5.20 VIN=20V, IO=0.3A f Line Regulation 5.00 80 Conditions Oscillation Frequency max. VIN=20V, IO=0.3A η Efficiency Unit typ. ±0.5 40 mV mV/°C 0.61 VIN=10V A SI-8000E Series ■External Dimensions (TO220F-5) (Unit : mm) 4.2 ±0.2 2.8 (17.9) 16.9±0.3 4.0±0.2 7.9±0.2 0.5 ±0.2 φ 3.2±0.2 ±0.2 10.0 2.6±0.1 (2.0) Pin Assignment q VIN w SWOUT e GND r VOS t N.C ±0.15 (4.6) +0.2 0.85 –0.1 (8.0) 0.95 +0.2 0.45 –0.1 P1.7±0.7×4=6.8±0.7 3.9±0.7 1 2 3 4 5 (4.3) 8.2±0.7 Plastic Mold Package Type Flammability: UL94V-0 Product Mass: Approx. 2.3g Forming No. 1101 ■Block Diagram ■Typical Connection Diagram 5V : 200µH VIN 1 2 SWOUT OCP VIN Reg. OSC 1 TSD Reset Drive + Comp. 2 VIN SI-8000E C1 100µF 4 VOS Amp. D1 AK06 (Sanken) VOS GND 3 VREF L1 NC + C2 330µF 4 5 GND 3 GND VO SWOUT GND 5 N.C ■Ta-PD Characteristics Infinite heatsink With Silicone Grease Heatsink: Aluminum 0× 10 m 2m 0× 10 20 0× 10 m (5 75 .2° ×7 C/ 5× W 2m ) m (7. 6° C/ W) .3 VO VIN IO ηx VF / °C W ) 5 Without heatsink 0 –30 0 25 50 100 VO –1 –VF·IO 1– ηχ VIN (2 0× 2m PD=VO·IO The efficiency depends on the input voltage and the output current. Therefore, obtain the value from the efficiency graph and substitute the percentage in the formula above. 20 Power Dissipation PD (W) 15 75 100 125 : : : : : Output voltage Input voltage Output current Efficiency (%) Diode D1 forward voltage 0.4V(AK06) Operating Ambient Temperature Ta (°C) Thermal design for D1 must be considered separately. ICs 33