1-1-2 Switching Mode Regulator ICs SI-8000HFE Series Full-Mold, Separate Excitation Step-down Switching Mode Regulator ICs ■Features ■Lineup • Compact full-mold package (equivalent to TO220) Part Number SI-8008HFE VO (V) Variable (0.8 to 15) • Output current: 5.5 A SI-8050HFE 5 IO (A) 5.5 • High efficiency: 83% typ. (at Vo = 5 V) • Requires only 4 discrete components • Built-in reference oscillator (150 kHz) ■Absolute Maximum Ratings • Built-in drooping-type-overcurrent and thermal protection circuits DC Input Voltage • Built-in soft start circuit (Output ON/OFF available) Power Dissipation Parameter Symbol Ratings Unit VIN 43 V PD1-1 25 (with infinite heatsink) PD1-2 20 (with infinite heatsink) PD2-1 2.15 (without heat sink, standalone operation) PD2-2 1.72 (without heatsink, standalone operation) Tj +150 Storage Temperature Tstg –40 to +150 °C Thermal Resistance (Junction to Case) θ j-c 5 °C/W Thermal Resistance (Junction to Ambient Air) θ j-a 58 °C/W Junction Temperature* ■Applications • Onboard local power supplies • AV equipment Conditions Limited by thermal protection, Tjmax=150°C Tjmax=125°C W Limited by thermal protection, Tjmax=150°C Tjmax=125°C °C *: 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 Symbol Input Voltage Range VIN Output Voltage Range VO Output Current Range SI-8008HFE SI-8050HFE Vo+3*1 to 40 0.8 to 24 8 to 40 5.0 Tjop Operating Temperature Range Top (Ta=25°C) V V A 0 to 5.5 –30 to +125 –30 to +85 IO Operating Junction Temperature Range Unit °C °C *1: The minimum value of an input voltage range is the higher of 4.5 V or VO + 3 V. ■Electrical Characteristics (Ta=25°C) Ratings Parameter Output Voltage (Reference Voltage) Symbol Vo (VADJ) SI-8008HFE (at Vo = 5 V) typ. max. min. 0.784 Conditions Temperature Coefficient of Output Voltage (Temperature Coefficient of Reference Voltage) ∆Vo/∆T (∆VADJ/∆T) Conditions η Efficiency Conditions Oscillation Frequency ∆VOLOAD Conditions Conditions Low Voltage VIN=15V Conditions 10 VSSL=0V Conditions 6 VIN=15V, Io=0A Conditions 200 VIN=15V, VSS=0V Iq Quiescent Circuit Current 50 Iq(OFF) 10 VSSL=0V 400 200 VIN=15V, VSS=0V SI-8000HFE 5 SS ICs mV V µA mA 400 SI-8000HFE 5 SS C3 VOUT. ON/OFF mV A 0.5 30 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. 76 50 VIN=15V 0.5 30 % kHz 80 5.6 Low Level Voltage ON/OFF Pin* mV/°C 80 5.6 VSSL Outflow Current at ISSL V VIN=15V, Io=1A ±0.5 150 VIN=15V, Io=3A 60 VIN=10 to 30V, Io=3A 20 VIN=15V, Io=0.2 to 3A Conditions Overcurrent Protection Starting Current 0.816 150 VIN=15V, Io=3A 60 VIN=10 to 30V, Io=3A 20 VIN=15V, Io=0.2 to 3A fo IS max. 5.10 VIN=15V, Io=1A, Tc=0 to 100°C 83 VIN=15V, Io=3A Conditions Load Regulation 0.800 VIN=15V, Io=1A Unit SI-8050HFE typ. 5.00 min. 4.90 ±0.1 VIN=15V, Io=1A, Tc=0 to 100°C 83 VIN=15V, Io=3A ∆VOLINE Line Regulation Ratings Soft start µA SI-8000HFE 5 SS C3 Soft start +VOUT. ON/OFF SI-8000HFE Series ■External Dimensions (TO220F-5) (Unit : mm) Type A φ 3.2±0.2 ±0.2 ±0.1 2.54 0.7 ±0.2 4.2 ±0.2 2.8 ±0.2 c 2 2.76 a ±0.2 b (2.0) 0.8 +0.2 0.5 –0.1 4.3 ±0.7 8.2 ±0.7 0.45 –0.1 3.9±0.7 1 2 3 4 5 Plastic Mold Package Type Flammability: UL94V-0 Product Mass: Approx. 2.3g +0.2 P1.7±0.7×4=6.8±0.7 ±0.2 4.6±0.6 ±0.6 ±0.6 (Measured at the tip) 9.6 +0.2 0.85 –0.1 4.3 4×p1.7 0.95±0.15 R-end (4.6) +0.1 0.5 –0.05 Pin Assignment q VIN w SW e GND r ADJ (VOS for SI-8050HFE) t SS 2.6±0.1 (2) c (17.9) ±0 . 16.9±0.3 2 b a. Part Number b. Lot Number c. Administer Number 5.0±0.6 SK (17.9) φ 3. a 15.87 ±0.2 6.68 5.4 ±0.2 4.0±0.2 7.9±0.2 10.0 0.5 ±0.2 ±0.2 3.3 10.16 Type B 4.7 (4.3) 8.2±0.7 The external dimension shall be either A or B. 1 2 3 4 5 ■Block Diagram SI-8008HFE SI-8050HFE SW VIN Overcurrent Protection PReg. 5 SS ON/OFF Soft Start 1 2 ON/OFF Soft Start OSC 2 Overcurrent Protection PReg. 5 ON/OFF Latch & Drive Reset SW IN Latch & Drive Reset OSC Thermal ADJ Protection 4 Comp. + – Error Amp. + – Reference Voltage GND GND 3 3 Vos Thermal Protection Comp. Error Amp. + + – 1 4 – + + Reference Voltage ■Typical Connection Diagram VIN C1 1 + SW IN C4 VOUT L 2 + Di PReg. 5 ON/OFF C2 VIN C1 1 + SW IN C4 L 2 VOUT + Di PReg. C2 5 ON/OFF R1 SI-8008HFE SI-8050HFE C3 C3 ADJ 4 + – + – C1 C2 C3 C4 L1 Di ADJ + – 4 – + + R2 GND GND 3 3 : 1500µF : 1000µF :1µF (Only when using soft-start function) :4.7µF (RPER11H475K5 (Murata Manufacturing) recommended) :100µH : FMB-G16L (Sanken) ICs 77