●SI-3000LUS Series SI-3000LUS Series Surface-Mount, Low Current Consumption, Low Dropout Voltage Dropper Type ■Features • • • • • Compact surface-mount package (SOT-89-3) Output current: 250 mA Low dropout voltage: VDIF ≤ 0.5 V (at IO = 250 mA) 4 types of output voltages (1.8 V, 2.5 V, 3.3 V, 5.0 V) available Built-in dropping type overcurrent, thermal protection circuits ■Applications • Auxiliary power supply for PC • Battery-driven electronic equipment ■Absolute Maximum Ratings Parameter (Ta=25°C) Symbol Ratings DC Input Voltage VIN 18 Unit V DC Output Current IO 250 mA Power Dissipation PD*1 0.75 W Junction Temperature Tj*2 –40 to +135 °C Storage Temperature Top*2 –40 to +125 °C Thermal Resistance (Junction to Ambient Air) θ j-a *1 146 °C/W *1: When mounted on glass-epoxy board 40 × 40 mm (copper laminate area 2%) *2: Thermal protection circuits may operate if the junction temperature exceeds 135°C ■Recommended Operating Conditions Parameter Ratings Symbol min. Unit max. Input Voltage VIN *2 VO+2*1 V DC Output Current IO 0 250 mA Ambient Operating Temperature Top –20 85 °C *1: VIN (max) and IO (max) are restricted by the relationship PD = (VIN - VO) × IO. Calculate these values referring to the reference data. *2: Refer to the dropout voltage section. ●SI-3000LUS Series ■Electrical Characteristics (Ta=25°C, VC=2V unless otherwise specified) Ratings Parameter Symbol VO Output Voltage (Under development) SI-3018LUS SI-3025LUS (Under development) typ. max. min. typ. max. min. typ. max. min. typ. 1.764 1.800 1.836 2.450 2.500 2.550 3.234 3.300 3.366 4.900 5.000 VIN=3.3V, IO=10mA VDIF VIN=3.3V, IO=10mA 0.3 0.5 Conditions cient of Output Voltage Quiescent Circuit Overcurrent Protection Starting Current*1 Conditions IS1 0.5 10 10 VIN=6 to 10V, IO=10mA 40 40 40 40 VIN=3.3V, IO=0 to 250mA VIN=3.3V, IO=0 to 250mA VIN=5V, IO=0 to 250mA VIN=6V, IO=0 to 250mA ±0.25 ±0.25 V V ±0.3 ±0.3 mV mV mV/°C Tj=0 to 100°C 55 55 55 55 VIN=3.3V, f=100 to 120HZ VIN=3.3V, f=100 to 120HZ VIN=5V, f=100 to 120HZ VIN=6V, f=100 to 120HZ 250 250 250 Conditions 0.5 VIN=4.5 to 8V, IO=10mA Iq Current 0.3 10 RREJ Conditions 0.3 VIN=3.3 to 5V, IO=10mA Conditions Ripple Rejection VIN=6V, IO=10mA 10 ∆VO/∆Ta Temperature Coeffi- 5.100 VIN=3.3 to 5V, IO=10mA ∆VLOAD Conditions Unit max. IO=250mA ∆VLINE Load Regulation (Under development) IO=100mA 0.5 Conditions VIN=5V, IO=10mA 0.3 Conditions Line Regulation SI-3050LUS min. Conditions Dropout Voltage SI-3033LUS 250 VIN=3.3V, IO=0mA VIN=3.3V, IO=0mA 260 260 VIN=3.3V VIN=5V, IO=0mA 260 VIN=3.3V dB VIN=6V, IO=0mA 260 VIN=5V µA mA VIN=6V *1: Is1 is specified as the 5% drop point of output voltage VO on the condition that VIN=3.3 V (5 V for SI-3033LUS, 6 V for SI-3050LUS), and IO=10 mA. ■External Dimensions (Unit : mm) 4.5 (1.7) ) (0.4) 0.3 1.6 (5 °) (R .0) 3 0.54 max. 0.49max. (5 0.8min. 2 °) 2.5 0.25 ° 45 1 4.25max. ( φ1 0.4 0.49max. 0. (0.1) (R 15 ) 1.5 1.5 1.5 (8°) (8°) 0.16 Pin Arrangement q VIN w GND e VOUT Plastic Mold Package Type Flammability: UL94V-0 Weight: Approx. 0.05g ●SI-3000LUS Series ■Block Diagram VIN 1 3 VO 2 GND TSD + – REF ■Standard External Circuit VIN VO 1 3 CIN + Load + 2 VIN CO GND CO: Output capacitor (10 µF or larger) The SI-3000LUS series can be operated on the circuit even if a low ESR ceramic capacitor is used as the output capacitor. CIN:Input capacitor (0.1 to 10 µF) This capacitor is required in the case of an inductive input line or long wiring. ■Reference Data Copper Laminate Area vs. Power Dissipation Tj=100°C PWB size 40 × 40 1 Power Dissipation PD (W) Ta=25°C 0.9 Ta=40°C 0.8 Ta=60°C • A monolithic IC is mounted. The inner frame stage is connected to the GND pin (pin 2). Therefore, enlarging the copper laminate area leading to the GND pin achieves a heat radiation effect. • How to calculate the junction temperature Measure the temperature (TC) of the GND pin (pin 2) lead section using a thermistor, etc. Substitute this value in the following formula and calculate the junction temperature. T j=P D ×θj–c+Tc ( θ j–c=5 ° C/W) Ta=85°C 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 10 100 Copper Laminate Area (mm2) 1000 ●SI-3000LUS Series ■Typical Characteristics of SI-3033LUS (Ta=25°C) IO vs. VDIF Characteristics Output Voltage Characteristics Line Regulation 3.34 5 0.6 lO=0mA 3.32 0.4 0.3 0.2 Output Voltage VO (V) 4 Output Voltage VO (V) Dropout Voltage VDIF (V) 0.5 lO=0mA 3 2 lO=250mA 3.28 lO=250mA 3.26 3.24 1 0.1 3.30 3.22 0 50 100 150 200 250 300 0 4 6 8 10 Input Voltage VIN (V) Output Current IO (mA) Load Regulation Overcurrent Protection Characteristics 5 3.34 3.32 4 VIN=3.8V Output Voltage VO (V) Dropout Voltage VDIF (V) 2 3.30 8V 3.28 6V 5V 3.26 3 VIN=3.8V 2 5V 1 3.24 8, 10V 3.22 0 50 100 150 200 250 Output Current IO (mA) 300 0 0 100 200 300 Output Current IO (mA) 400 0 4 6 8 Input Voltage VIN (V) 10