SI-8050TFE

1-1-3 DC/DC Converter ICs SI-8000TFE Series Full-Mold, Separate Excitation Step-down Switching Mode ■Features ■Lineup • Compact full-mold package (equivalent to TO220) Part Number SI-8008TFE VO (V) Variable (0.8 to 24) • Output current: 1.5 A SI-8050TFE 5 IO (A) 1.5 • High efficiency: 81% typ. (at Vo = 5 V) • Requires only 4 discrete components ■Absolute Maximum Ratings • Built-in dropping-type-overcurrent and thermal protection circuits DC Input Voltage • Output ON/OFF available (circuit current at output OFF: 200µA typ.) Power Dissipation Symbol Ratings Unit VIN 43 V PD1-1 17.8 (with infinite heatsink) PD1-2 14.2 (with infinite heatsink) PD2-1 2.15 (without heat sink, standalone operation) PD2-2 1.72 (without heatsink, standalone operation) Tj –30 to +150 Storage Temperature Tstg –40 to +150 Thermal Resistance (Junction to Case) θ j-c 7 Thermal Resistance (Junction to Ambient Air) θ j-a 58 • Soft start available by ON/OFF pin Junction Temperature* ■Applications • Onboard local power supplies • AV equipment • OA equipment Conditions Limited by thermal protection, Tjmax=150°C Tjmax=125°C W Limited by thermal protection, Tjmax=150°C Tjmax=125°C ns Parameter °C °C es ig • Built-in reference oscillator (300 kHz) °C/W °C/W D *: This product has built-in thermal protection circuits that may operate when the junction temperature rises above 130°C. The recommended design for the junction temperature during operation is below 125°C. ew ■Recommended Operating Conditions Ratings Symbol Input Voltage Range VIN Output Voltage Range VO Vo+3*1 to 40 0.8 to 24 Tjop Operating Temperature Range Top ■Electrical Characteristics de Ratings Symbol SI-8008TFE typ. Vo VADJ Reference Voltage en min. Output Voltage 0.784 ∆Vo/∆T ∆VREF/∆T Conditions η Efficiency fo Oscillation Frequency R ∆VOLOAD ot N Low Level Voltage ON/OFF Pin* Outflow Current at Low Voltage Conditions IS Quiescent Circuit Current Conditions 10 VSSL=0V Conditions 6 VIN=15V, Io=0A Conditions 200 VIN=15V, VSS=0V Iq(OFF) V mV/°C 80 40 400 0.5 40 200 VIN=15V, VSS=0V SI-8000TFE 5 SS mV mV A 10 VSSL=0V V µA mA 400 SI-8000TFE 5 SS µA SI-8000TFE 5 SS C3 VO.ON/OFF ICs 40 6 VIN=15V, Io=0A *: Pin 5 is the SS 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. SS-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 SS pin is pulled up to the power supply in the IC, so applying the external voltage is prohibited. If the pin is not used, leave it open. 40 80 VIN=15V 0.5 40 % kHz 1.6 VIN=15V Iq max. 5.10 VIN=15V, Io=0.1A ±0.5 1.6 Conditions VSSL ISSL Unit SI-8050TFE typ. 5.00 min. 4.90 300 VIN=15V, Io=0.5A 60 VIN=10 to 30V, Io=0.5A 10 VIN=15V, Io=0.2 to 1.5A Conditions Overcurrent Protection Starting Current (Ta=25°C) Ratings 300 VIN=15V, Io=0.5A 60 VIN=10 to 30V, Io=0.5A 10 VIN=15V, Io=0.2 to 1.5A ∆VOLINE Load Regulation °C VIN=15V, Io=0.1A, Tc=0 to 100°C 81 VIN=15V, Io=0.5A Conditions Line Regulation °C ±0.1 VIN=15V, Io=0.1A, Tc=0 to 100°C 81 VIN=15V, Io=0.5A ec o Conditions (Ta=25°C) V V A 0.816 m Temperature Coefficient of Reference Voltage 0.800 VIN=15V, Io=0.1A max. m Conditions Temperature Coefficient of Output Voltage d *1: The minimum value of an input voltage range is the higher of 4.5 V or VO + 3 V. Parameter 8 to 40 5.0 0 to 1.5 –20 to +125 –20 to +85 IO Operating Junction Temperature Range Unit SI-8050TFE fo Output Current Range SI-8008TFE rN Parameter Soft start C3 Soft start +VO.ON/OFF SI-8000TFE Series ■External Dimensions (TO220F-5) (Unit : mm) ±0.2 4.2 ±0.2 2.8 (2.0) (17.9) 16.9±0.3 2.6±0.1 Pin Assignment q IN w SW e GND r ADJ t SS 4.6±0.6 (4.6) +0.2 0.85 –0.1 es ig 0.95±0.15 Plastic Mold Package Type Flammability: UL94V-0 Product Mass: Approx. 2.3g +0.2 P1.7±0.7×4=6.8±0.7 D 0.45 –0.1 (4.3) 8.2±0.7 ew 3.9±0.7 ns φ 3.2±0.2 0.5 ±0.2 4.0±0.2 7.9±0.2 10.0 rN 1 2 3 4 5 ■Block Diagram d fo ■Typical Connection Diagram SW IN 5 SS Latch & Drive m Reset ON/OFF Soft Start OSC Thermal ADJ Protection 4 m Comp. + – ec o Error Amp. Reference Voltage R GND SW IN SI-8000TFE C1 220µF + SS 5 GND 3 2 VOUT R1 ADJ 4 + R2 Di C2 470µF IADJ C3 GND GND C1 : 220µF C2 : 470µF C3 :1µF (Only when using soft-start function) L1 : 47µH Di : RK16 (Sanken) N ot 3 2 en Overcurrent Protection PReg. + + – 1 1 VIN de SI-8008TFE L1 47µH ICs 41