Maker : Sanken electric
Part No. : 8050SD

Datasheet PDF : 8050SD.pdf
Cross Reference : 8050SD Cross Reference
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Product Information

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. ■Electrical Characteristics Ratings Parameter Symbol min. Output Voltage Efficiency VO Conditions 3.17 SI-8033SD typ. 3.3 VIN=15V, IO=1A 79 VIN=15V, IO=1A 60 VIN=15V, IO=1A 25 VIN=8 to 28V, IO=1A 10 VIN=15V, IO=0.5 to 1.5A ±0.5 3.1 VIN=15V 0.2 20 30 40 VSSL=0.2V 20 3.1 VIN=20V 0.2 30 40 30 80 max. 3.43 min. 4.8 SI-8050SD typ. 5.0 VIN=20V, IO=1A 84 VIN=20V, IO=1A 60 VIN=20V, IO=1A 40 VIN=10 to 30V, IO=1A 10 VIN=20V, IO=0.5 to 1.5A ±0.5 40 100 max. 5.2 (Ta=25°C) Unit V % kHZ mV mV mV/°C A V η Conditions f Conditions ∆VOLINE Conditions ∆VOLOAD Conditions ∆VO/∆Ta IS1 Conditions VSSL ISSL Conditions www.DataSheet4U.com Oscillation Frequency Line Regulation Load Regulation Temperature Coefficient of Output Voltage Overcurrent Protection Starting Current Soft Start Pin* Low-Level Voltage Outflow Current at Low Voltage µA * Pin 5 is a soft start pin. Soft start at power on can be performed with a capacitor connected to this pin. The output can also be turned ON/OFF with this pin. The output is stopped by setting the voltage of this pin to VSSL or lower. Soft-start pin voltage can be changed with an open-collector drive circuit of a transistor. When using both the soft-start and ON/OFF functions together, the discharge current from C3 flows into the ON/OFF control transistor. Therefore, limit the current securely to protect the transistor if C3 capacitance is large. The ON/OFF pin is pulled up to the power supply in the IC, so applying the external voltage is prohibited. If this pin is not used, leave it open. SI-8000SD SI-8000SD SI-8000SD 5 ON/OFF 5 ON/OFF C3 5 ON/OFF C3 VOUT. ON/OFF Soft start Soft start +VOUT. ON/OFF 50 ICs SI-8000SD Series ■External Dimensions (TO263-5) Case temperature measurement point (0.40) 1.2 (Unit : mm) 10.0 (8.0) 4.5 3-R0.3 ±0.2 ±0.2 9.90 (15°) ±0.2 ±0.2 (4.4) 1.3 +0.10 –0.05 (1.75) (6.8) ±0.2 9.2± ±0.3 15.3 (3°) ±0.1 0.10 (3°) ±0.15 15.30 ±0.3 9.2 ±0.2 φ1.5 Dp: ±0.2 (3°) (2×R0.45) Pin Assignment q VIN w SWOUT e GND r VOS t S.S Plastic Mold Package Type Flammability: 94V-0 Product Mass: Approx. 1.48g (4.6) 2.4 (R0.3) ±0.3 ±0.2 ±0.2 2.0 (0.75) 4.9 0.88 ±0.10 (R0.3) 2.54 0~6° ±0.1 (0.5) (1.7 ±0.25 ) 1 2 3 4 5 0.8 ±0.25 (1.7 ) ±0.1 (1.7 ±0.25 ) 0.8 ±0.25 (1.7 ) (3°) 2-R0.3 10.0 ±0.02 (3°) ■Block Diagram ■Reference Data Copper Laminate Area on Glass Epoxy Board vs. thermal resista...

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