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 Part Number SI-8008TFE SI-8050TFE TO220) VO (V) Variable (0.8 to 24) 5 •Output current: 1.5 A IO (A) 1.5 •High efficiency: 81% typ. (at Vo = 5 V) •Requires only 4 discrete components •Built-in reference oscillator (300 kHz) ■ Absolute Maximum Ratings •Built-in dropping-type-overcurrent and thermal Parameter Symbol Ratings Unit Conditions protection circuits DC Input Voltage VIN 43 V •Output ON/OFF available (circuit current at PD1-1 17.8 (with infinite heatsink) Limited by thermal protection, Tjmax=150°C output OFF: 200µA typ.) Power Dissipation PD1-2 14.2 (with infinite heatsink) W Tjmsax=125°C PD2-1 2.15 (without heat sink, standalone operation) Limited by thenrmal protection, Tjmax=150°C •Soft start available by ON/OFF pin PD2-2 1.72 (without heatsink, standalone operation) Tjmax=125°C Junction Temperature* Tj –30 to +150 °C g Storage Temperature Tstg –40 to +150 °C i ■ Applications Thermal Resistance (Junction to Case) θj-c 7 °C/W s •Onboard local power supplies Thermal Resistance (Junction to Ambient Air) θj-a 58 °C/We •AV equipment *:This product has built-in thermal protection circuits that may operate when Dthe junction temperature rises above 130°C. •OA equipment The recommended design for the junction temperature during operation is below 125°C. w ■ Recommended Operating Conditions e Ratings Parameter Symbol SI-8008TFE N SI-8050TFE Unit (Ta=25°C) Input Voltage Range VIN Vo+3*1 to 40 8 to 40 V Output Voltage Range VO 0.8 to 24 r 5.0 V Output Current Range IO 0 to 1.5 A o Operating Junction Temperature Range Tjop –20 to +125 °C Operating Temperature Range Top f–20 to +85 °C *1: The minimum value of an input voltage range is the higher of 4.5 V or VO + 3 V. d ■ Electrical Characteristics e (Ta=25°C) d Ratings Ratings Parameter Symbol SI-8008TnFE SI-8050TFE Unit min. typ. max. min. typ. max. Output Voltage Vo e 4.90 5.00 5.10 Reference Voltage VADJ 0.784 m 0.800 0.816 V Conditions VIN=15V, Io=0.1A VIN=15V, Io=0.1A Temperature Coefficient of Output Voltage ∆Vo/∆T m ±0.5 ∆VREF/∆T ±0.1 mV/°C Temperature Coefficient of Reference Voltage Conditions oVIN=15V, Io=0.1A, Tc=0 to 100°C VIN=15V, Io=0.1A, Tc=0 to 100°C η 81 81 Efficiency Conditionsc VIN=15V, Io=0.5A VIN=15V, Io=0.5A % fo e 300 300 Oscillation Frequency kHz CRonditions VIN=15V, Io=0.5A VIN=15V, Io=0.5A ∆VOLINE 60 80 60 80 Line Regulation mV Conditions VIN=10 to 30V, Io=0.5A VIN=10 to 30V, Io=0.5A ∆VtOLOAD 10 40 10 40 Load Regulation o mV Conditions VIN=15V, Io=0.2 to 1.5A VIN=15V, Io=0.2 to 1.5A Overcurrent Protection N IS 1.6 1.6 A Starting Current Conditions VIN=15V VIN=15V Low Level Voltage VSSL 0.5 0.5 V ON/OFF Pin* Outflow Current at ISSL 10 40 10 40 µA Low Voltage Conditions VSSL=0V VSSL=0V Iq 6 6 mA Quiescent Circuit Current Conditions VIN=15V, Io=0A VIN=15V, Io=0A Iq(OFF) 200 400 200 400 µA Conditions VIN=15V, VSS=0V VIN=15V, VSS=0V *: 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 SI-8000TFE SI-8000TFE SI-8000TFE 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 cur- rent securely to protect the transistor if C3 capacitance is large. The SS pin is pulled up to the 5 SS 5 SS 5 SS power supply in the IC, so applying the external voltage is prohibited. If the pin is not used, C3 C3 leave it open. VO.ON/OFF Soft start Soft start +VO.ON/OFF 40 ICs

SI-8000TFE Series ■ External Dimensions (TO220F-5) (Unit : mm) 4.2±0.2 10.0±0.2 2.8±0.2 5 0.±0.24.0±0.29 φ±0.23.2 7. ±0.39 6. 1 17.9) Pqin AINssignment s 2.6±0.1( w SW n e GND g 0.95±0.15 (2.0) rt ASDSJ si 0.85+–00..12 (4.6) ±0.64.6 Plastic Mold PackageD Tyepe P1.7±0.7×4=6.8±0.7 0.45+–00..12 Flammability: UL94V-0 Product Mass: Approx. 2.3g 3.9±0.7 (4.3) w 8.2±0.7 e 1 2 3 4 5 N r o ■ Block Diagram ■ Typical Connection Diagram f d L1 47µH e 1 2 SI-8008TFE d VIN IN SW VOUT 1 IN SW 2 n SI-8000TFE R1 5SS PReg. Reset OPrvoetreccutirorennt Latch & m e 220Cµ1F + SS5 GND3 ADJ 4 DiR2 IADJ +4C720µF ON/OFF Drive Soft Start OSC m C3 GND GND – Thermal ADJ +Comp. oProtection 4 Error Amp. c– e++ C1:220µF R Reference C2:470µF GND Voltage C3:1µF (Only when using soft-start function) 3 L1 :47µH t Di :RK16 (Sanken) o N ICs 41