1-1-2 Switching Mode Regulator ICs SI-8000JF Series Full-Mold, Separate Excitation Step-down Switching Mode Regulator ICs ■Features ■Lineup • Compact full-mold package (equivalent to TO220) • Output current: 1.5A • High efficiency: 67 to 88% • Requires only 4 discrete components • Internally-adjusted phase correction and output voltage • Capable of downsize a choke-coil due to IC's high switching frequency (125kHz). (Compared with conventional Sanken devices) • Built-in foldback-overcurrent and thermal protection circuits • Output ON/OFF available (circuit current at output OFF: 200µA max.) • Soft start available by ON/OFF pin Part Number SI-8015JF SI-8033JF SI-8050JF SI-8120JF VO (V)* 1.59 3.3 5.0 12.0 IO (A) 1.5 * VREF(V) for SI-8015JF ■Absolute Maximum Ratings Parameter Symbol Ratings VIN 43 V PD1 16.6 (with infinite heatsink) W DC Input Voltage Power Dissipation Unit PD2 1.5 (without heatsink, standalone operation) W Junction Temperature Tj +125 °C Storage Temperature Tstg –40 to +125 °C Thermal Resistance (Junction to Case) θ j-c 6.0 °C/W ■Applications • Power supplies for telecommunication equipment • Onboard local power supplies ■Recommended Operating Conditions Ratings Parameter Symbol DC Input Voltage Range Unit Conditions SI-8015JF* SI-8033JF SI-8050JF SI-8120JF VIN1 VO+2 to 40 5.3 to 40 7 to 40 14 to 40 V IO=0 to 1A VIN2 VO+3 to 40 6.3 to 40 8 to 40 15 to 40 V IO=0 to 1.5A VIN≥VO+3V Output Current Range Operating Junction Temperature Range IO 0 to 1.5 A Tjop –30 to +125 °C * SI-8015JF is a variable output voltage type. The variable output voltage range is from 2.5 V to 24 V. ■Electrical Characteristics (Ta=25°C) Ratings Parameter Output Voltage*1 Line Regulation Load Regulation Temperature Coefficient of Output Voltage*3 Overcurrent Protection Starting Current typ. max. min. typ. max. min. typ. max. 1.558 1.59 1.622 3.234 3.30 3.366 4.90 5.00 5.10 11.76 12.00 12.24 VIN=12V, IO=0.5A VIN=12V, IO=0.5A VIN=20V, IO=0.5A VIN=24V, IO=0.5A 77 82 88 VIN=15V, IO=0.5A VIN=20V, IO=0.5A VIN=24V, IO=0.5A 125 125 125 125 Conditions VIN=12V, IO=0.5A 25 10 VIN=20V, IO=0.5A VIN=24V, IO=0.5A 25 40 60 VIN=18 to 30V, IO=1.0A 10 10 40 VIN=20V, IO=0.5 to 1.5A VIN=24V, IO=0.5 to 1.5A ±0.5 ±0.5 ±1.0 1.6 0.5 0.5 0.5 Outflow Current ISSL 100 100 100 100 Quiescent Circuit Current Conditions Iq(OFF) Conditions *1: Reference voltage for SI-8015JF *2: VREF for SI-8015JF VSSL=0V VSSL=0V VSSL=0V VSSL=0V 7 7 7 7 VIN=12V, IO=0A VIN=15V, IO=0A VIN=20V, IO=0A VIN=24V, IO=0A 200 VIN=12V, VON/OFF=0.3V 200 VIN=15V, VON/OFF=0.3V 200 VIN=20V, VON/OFF=0.3V µA mA µA SI-8000JF SI-8000JF SI-8000JF 5 ON/OFF 5 ON/OFF 5 ON/OFF C3 VOUT. ON/OFF ICs 200 VIN=24V, VON/OFF=0.3V V *3: Temperature Coefficient of Reference Voltage for SI-8015JF *4: ∆VREF/∆Ta for SI-8015JF *5: Pin 5 is the ON/OFF 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. ON/OFF-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. 56 mV A VIN=24V 0.5 Iq mV 1.6 VIN=20V VSSL Conditions kHZ mV/ °C Low Level Voltage at Low Voltage % 40 VIN=15V, IO=0.5 to 1.5A VIN=15V V 130 VIN=10 to 30V, IO=1.0A 30 1.6 VIN=12V 100 10 ±0.5 1.6 80 VIN=8 to 30V, IO=1.0A 30 VIN=12V, IO=0.2 to 0.8A ∆VO/∆Ta*4 VIN=15V, IO=0.5A 80 VIN=8 to 30V, IO=0.5A ∆VOLOAD IS1 VIN=15V, IO=0.5A 67 ∆VOLINE Conditions Unit SI-8120JF min. f Conditions SI-8050JF max. Conditions Conditions SI-8033JF typ. Conditions Oscillation Frequency Terminal VO*2 SI-8015JF min. η Efficiency ON/OFF*5 Symbol Soft start C3 Soft start +VOUT. ON/OFF SI-8000JF Series ■External Dimensions (TO220F-5) (Unit : mm) 4.2±0.2 ±0.2 2.8 ±0.2 Pin Assignment q VIN w SWOUT e GND r VOS t ON/OFF (2.0) 2.6±0.1 (17.9) 16.9±0.3 4.0±0.2 7.9±0.2 φ 3.2±0.2 0.5 10.0 ±0.15 0.95 (8.0) (4.6) +0.2 0.85 –0.1 +0.2 0.45 –0.1 P1.7±0.7×4=6.8±0.7 3.9±0.7 Plastic Mold Package Type Flammability: UL94V-0 Product Mass: Approx. 2.3g (4.3) 8.2±0.7 Forming No.1101 1 2 3 4 5 ■Block Diagram SI-8015JF 8033JF, 8050JF, 8120JF SW OUT VIN 1 PReg. 2 1 SW OUT VIN PReg. OCP 5 ON/OFF 2 OCP 5 ON/OFF ON/OFF Soft Start Latch& Drive Reset ON/OFF Soft Start OSC + – OSC VREF TSD Comp. Error Amp. Latch& Drive Reset + – 4 TSD Comp. Error Amp. + – 4 + – VREF VREF GND GND 3 3 ■Typical Connection Diagram SI-8015JF 8033JF, 8050JF, 8120JF L1 1 VIN SW VIN SI-8015JF + 220µF VREF L1 2 VOUT C4 R1 4 R2 SW VIN SI-8000JF + ON/OFF GND 5 3 1 VIN 470µF + C1 Di ON/OFF GND 5 3 VS 2 VOUT 4 + Di C2 REF C3 GND GND GND GND IREF IREF shall be approx. 2mA. C1 : C2 : C3 : C4 : L1 : Di : 50V/220µF 25V/470µF 10V/0.47µF (Only when using soft-start function) 6800pF VREF × (R1+R2) 100µH VOUT= RK16 (Sanken) R2 C1 C2 C3 L1 Di : : : : : 50V/220µF 25V/470µF 10V/0.47µF (Only when using soft-start function) 100µH RK16 (Sanken) ICs 57