SI-8000TFE_11

1-1-3 DC/DC Converter ICs SI-8000TFE Series Full-Mold, Separate Excitation Step-down Switching Mode ■Features • Compact full-mold package (equivalent to TO220) • Output current: 1.5 A • High efficiency: 81% typ. (at Vo = 5 V) • Requires only 4 discrete components • Built-in reference oscillator (300 kHz) • Built-in dropping-type-overcurrent and thermal protection circuits • Output ON/OFF available (circuit current at output OFF: 200µA typ.) • Soft start available by ON/OFF pin Junction Temperature* Storage Temperature ■Lineup Part Number VO (V) IO (A) SI-8008TFE Variable (0.8 to 24) 1.5 SI-8050TFE 5 ■Absolute Maximum Ratings Parameter DC Input Voltage Symbol VIN PD1-1 Power Dissipation PD1-2 PD2-1 PD2-2 Tj Tstg Ratings 43 17.8 (with infinite heatsink) 14.2 (with infinite heatsink) 2.15 (without heat sink, standalone operation) 1.72 (without heatsink, standalone operation) –30 to +150 –40 to +150 7 58 °C °C °C/W °C/W W Unit V Limited by thermal protection, Tjmax=150°C Tjmax=125°C Limited by thermal protection, Tjmax=150°C Tjmax=125°C Conditions ■Applications • Onboard local power supplies • AV equipment • OA equipment Thermal Resistance (Junction to Case) Thermal Resistance (Junction to Ambient Air) θ j-c θ j-a *: 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. ■Recommended Operating Conditions Ratings Parameter Input Voltage Range Output Voltage Range Output Current Range Operating Junction Temperature Range Operating Temperature Range Symbol VIN VO IO Tjop Top SI-8008TFE SI-8050TFE Unit (Ta=25°C) Vo+3*1 to 40 0.8 to 24 0 to 1.5 –20 to +125 –20 to +85 8 to 40 5.0 V V A °C °C *1: The minimum value of an input voltage range is the higher of 4.5 V or VO + 3 V. ■Electrical Characteristics Ratings Parameter Symbol Ratings (Ta=25°C) min. Output Voltage (Reference Voltage) Temperature Coefficient of Output Voltage (Temperature Coefficient of Reference Voltage) Efficiency Oscillation Frequency Line Regulation Load Regulation Overcurrent Protection Starting Current Low Level Voltage ON/OFF Pin* Outflow Current at Low Voltage SI-8008TFE typ. 0.800 VIN=15V, Io=0.1A max. Vo (VADJ) Conditions min. 4.90 SI-8050TFE typ. 5.00 Unit max. 5.10 V 0.784 0.816 VIN=15V, Io=0.1A ±0.5 ∆Vo/∆T (∆VREF/∆T) Conditions η Conditions ±0.1 VIN=15V, Io=0.1A, Tc=0 to 100°C 81 VIN=15V, Io=0.5A 300 VIN=15V, Io=0.5A 60 VIN=10 to 30V, Io=0.5A 10 VIN=15V, Io=0.2 to 1.5A 1.6 mV/°C VIN=15V, Io=0.1A, Tc=0 to 100°C 81 VIN=15V, Io=0.5A 300 VIN=15V, Io=0.5A 60 VIN=10 to 30V, Io=0.5A 10 VIN=15V, Io=0.2 to 1.5A 1.6 % kHz fo Conditions ∆VOLINE Conditions 80 40 80 40 mV mV A ∆VOLOAD Conditions IS Conditions VIN=15V 10 VSSL=0V 6 VIN=15V, Io=0A 200 VIN=15V, VSS=0V 400 0.5 40 VIN=15V 10 VSSL=0V 6 VIN=15V, Io=0A 200 VIN=15V, VSS=0V 400 0.5 40 VSSL ISSL Conditions V µA mA µA Iq Quiescent Circuit Current Conditions Iq(OFF) Conditions *: 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. SI-8000TFE SI-8000TFE SI-8000TFE 5 SS 5 SS C3 5 SS C3 VO.ON/OFF Soft start Soft start +VO.ON/OFF 36 ICs SI-8000TFE Series ■External Dimensions (TO220F-5) (Unit : mm) 0.5 10.0 ±0.2 4.2 ±0.2 2.8 ±0.2 4.0±0.2 7.9±0.2 16.9±0.3 φ 3.2±0.2 2.6±0.1 (2.0) 0.95 ±0.15 +0.2 Pin Assignment q IN w SW e GND r ADJ t SS Plastic Mold Package Type Flammability: UL94V-0 Product Mass: Approx. 2.3g 0.85 –0.1 P1.7±0.7×4=6.8±0.7 0.45 –0.1 +0.2 3.9±0.7 (4.3) 8.2±0.7 12345 ■Block Diagram 4.6±0.6 (4.6) ■Typical Connection Diagram L1 47µH SI-8008TFE (17.9) VIN SW 2 1 IN SW 2 R1 VOUT 1 IN PReg. Overcurrent Protection Reset OSC Latch & Drive SI-8000TFE C1 220µF + SS 5 C3 GND 3 ADJ 4 R2 Di IADJ + 5 SS ON/OFF Soft Start C2 470µF Comp. + + – Thermal ADJ Protection 4 GND GND GND 3 + – Error Amp. Reference Voltage C1 : 220µF C2 : 470µF C3 :1µF (Only when using soft-start function) L1 : 47µH Di : RK16 (Sanken) ICs 37