●SI-3000B Series SI-3000B Series 5-Terminal, Multi-Function, Full-Mold, Low Dropout Voltage Dropper Type ■Features • • • • Compact full-mold package (equivalent to TO220) Output current: 0.27A Low dropout voltage: VDIF≤0.5V (at IO=0.27A) Output ON/OFF control terminal is compatible with LS-TTL. (It may be directly driven by LS-TTL or standard CMOS logic.) • Built-in foldback overcurrent, thermal protection circuits • Highly accurate overcurent protection starting current SI-3157B : 0.3 to 0.7A (VIN=18V) SI-3025B : 0.3 to 0.7A (When VIN=18V, setting VO=15.7V) 0.3 to 0.75A (When VIN=18V, setting VO=11.7V) • Variable output voltage type (SI-3025B) also available ■Applications • For BS and CS antenna power supplies • Electronic equipment ■Absolute Maximum Ratings Paarameter (Ta=25°C) Symbol Ratings Unit DC Input Voltage VIN 35 V Voltage of Output Control Terminal VC VIN V IO 0.27*1 A PD1 14(With infinite heatsink) W PD2 1.5(Without heatsink, stand-alone operation) W Junction Temperature Tj –40 to +125 °C Ambient Operating Temperature Top –30 to +100 °C Storage Temperature Tstg –40 to +125 °C DC Output Current Power Dissipation Thermal Resistance (junction to case) Rth(j-c) 7.0 °C/W Thermal Resistance (junction to ambient air) Rth(j-a) 66.7(Without heatsink, stand-alone operation) °C/W 28 ●SI-3000B Series ■Electrical Characteristics (Ta=25°C unless otherwise specified) Ratings Parameter Symbol SI-3157B min. Input Voltage Output Voltage (SI-3025B: Reference Voltage) VIN VO *2 14.92 30 Voltage (SI-3025B: Temperature (∆VREF/∆Ta) 120 Conditions 2.652 0.5 IO≤0.27A 90 10 VIN=(VO+1) to 27V, IO=0.27A 300 10 ±0.5 VIN=18V, IO=5mA, Tj=0 to 100°C VIN=VO+3V, IO=5mA, Tj=0 to 100°C Iq 54 54 VIN=18V, f=100 to 120HZ VIN=VO+3V, f=100 to 120HZ 3 10 3 VIN=18V, IO=0A 0.3 Conditions 0.7 VIN=18V VC. IH VC. IL Control Current IC. IH Conditions Control Current IC. IL (Output OFF) Conditions mV (3025B: mV/V) mV (3025B: mV/V) mV/°C dB 10 0.3 mA 0.75 When VIN=18V, setting VO=11.7V Conditions Control Voltage (Output OFF) V VIN=VO+3V, IO=0A 0.3 Control Voltage (Output ON) V VIN=VO+3V, IO=0.2A Starting Current*3,4 Terminal*5 (Output ON) 2.550 ±1.5 RREJ IS1 VC 27*1 VIN=VO+3V, IO=0 to 0.27A Conditions Overcurrent Protection 2.448 Unit max. VIN=18V, IO=0 to 0.27A Conditions Current 16.48 VIN=17 to 27V, IO=0.2A Conditions Quiescent Circuit 6*2,6 IO≤0.27A ∆VOLOAD ∆VO/∆Ta Ripple Rejection typ. 0.5 ∆VOLINE Temperature Coefficient of Output Coefficient of Reference Voltage) 27*1 VIN=18V, IO=0.2A VDIF Conditions Load Regulation min. V Conditions Line Regulation 15.70 SI-3025B max. (VREF) Conditions Dropout Voltage typ. A 0.7 When VIN=18V, setting VO=15.7V 2.0 2.0 V 0.8 0.8 20 VC=2.7V 20 VC=2.7V –0.3 VC=0.4V –0.3 µA mA VC=0.4V *1: VIN(max) and IO(max) are restricted by the relation PD(max)=(VIN-VO)•IO=14(W). *2: Refer to the dropout voltage.(Refer to Setting DC Input Voltage on page 7.) *3: IS1 is specified at –5(%) drop point of output voltage VO on the condition that VIN=VO+3V, IO=0.2A. *4: A foldback type overcurrent protection circuit is built into the IC regulator. Therefore, avoid using it for the following applications as it may cause starting errors: (1) Constant current load (2) Plus/minus power (3) Series power (4) VO adjustment by raising ground voltage *5: Output is ON even when output control terminal VC is open. Each input level is equivalent to LS-TTL. Therefore, it may be directly driven by an LS-TTL circuit. *6. When setting output voltage to 5V or less, input voltage needs to be set to 6V or over to operate stably. 29 ●SI-3000B Series ■Outline Drawing (unit:mm) φ 3.2±0.2 4.2±0.2 ±0.2 2.8 Part Number Lot Number (2.0) ±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 Plastic Mold Package Type Flammability: UL94V-0 Weight: Approx. 2.3g 5.0±0.6 2.6±0.1 (17.9) 16.9±0.3 4.0±0.2 7.9±0.2 0.5 ±0.2 10.0 3.9±0.7 (4.3) 8.2±0.7 SI-3157B SI-3025B q w e r t q w e r t GND VC VO VOS VIN GND VC VO VREF VIN Forming No. 1101 1 2 3 4 5 ■Block Diagram SI-3157B SI-3025B Tr1 5 3 MIC Reg. Amp. Drive VREF 2 Protection ON/OFF VREF 4 Equivalent to LS-TTL Equivalent to LS-TTL 1 30 3 MIC 4 Amp. Drive Protection ON/OFF Reg. 2 Tr1 5 1 ●SI-3000B Series ■Standard External Circuit SI-3157B D1 *2 5 + DC Input VIN OPEN *1 3 SI-3157B 2 4 + 1 C2 C1 C0 DC Output VO SI-3025B D1 *2 5 DC Input VIN 3 SI-3025B OPEN 2 C2 + *1 R1 *3 4 1 C1 R2 *3 + C0 DC Output VO C0 : Output capacitor (47 to 100µF) *1 C1 : Oscillation prevention capacitor C2 (C1: Approx. 47µF, C2: 0.33µF) These capacitors are required if the input line is inductive and in the case of long wiring. Tantalum capacitors are recommended for C1 and C0, particularly at low temperatures. *2 D1 : Protection diode This diode is required for protection against reverse biasing of the input and output. Sanken EU2Z is recommended. *3 R1 : External resistor for setting output voltage R2 Relationship between output voltage VO and external resistors R1 and R2 is as follows. R1 VO=VREF • 1+ (VREF=2.55V(typ.)) R2 R2 must be 2.55kΩ for stable operation. ■Ta-PD Characteristics Power Dissipation PD (W) 15 Infinite heatsink With Silicon Grease Heatsink: Aluminum 20 0× 20 10 10 0× 2m 0× 10 m 0× 75 5 2m ×7 m 5× (2 .3 °C (5. 2° 2m m /W ) C/ (7. W 6°C ) /W ) Without heatsink 0 –30 0 25 50 75 100 Ambient Temperature Ta (°C) PD=IO•[VIN(mean)–VO] 31 ●SI-3000B Series ■Typical Characteristics (When setting VO=15.7V for SI3025B) (Ta=25°C) IO vs. VDIF Characteristics Temperature Coefficient of Output Voltage(SI-3157B) 0.5 VIN=18V lO=0A 0.2 Output Voltage VO (V) 0.4 Output Voltage VO (V) Dropout Voltage VDIF (V) 15.9 0.3 Rise Characteristics(SI-3157B) 20 16.0 15 15.8 15.7 lO=0A 0.1A 0.2A 0.27A 10 15.6 15.5 5 0.1 15.4 0 0 0.05 0.1 0.15 0.2 0.25 15.3 –40 –20 0.3 Output Current IO (A) Line Regulation 20 40 60 0 0 80 100 120 140 25 30 Overcurrent Protection Characteristics(SI-3157B) Output Voltage VO (V) VIN=27V 25V 22V 18V 16.5V 15.5 15.3 15 V Output Voltage VO (V) 15.7 VIN=27V 15.3 10 25V 18V 22V 5 15.1 14.9 14 16 18 20 22 24 26 28 14.9 0 0.05 Input Voltage VIN (V) 0.1 0.15 0.2 0.25 0.3 Output Current IO (A) Output ON/OFF Control Thermal Protection Characteristics 20 20 Output Voltage VO (V) VIN=18V lO=0A Output Voltage VO (V) 20 VIN=16.5 0.27A 15.5 15.1 15 10 5 0 0 1 2 3 Output ON/OFF Control VC (V) 4 15 VIN=18V lO=10mA 10 5 0 0 20 40 60 80 100 120 140 160 180 Case Temperature TC (°C) Note on Thermal Protection: The thermal protection circuit is intended for protection against heat during instantaneous shortcircuiting. Its operation is not guaranteed for shortcircuiting over extended periods of time. 32 15 15.9 lO=0A 0.1A 0.2A 15.7 10 20 16.1 15.9 5 Input Voltage VIN (V) Load Regulation 16.1 Output Voltage VO (V) 0 Ambient Temperature TC (°C) 0 0 0.1 0.2 0.3 0.4 0.5 Output Current IO (A) 0.6 0.7