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Electronics Corp. APE1910 ABSOLUTE MAXIMUM RATINGS Thermal Resistance from Junction to Case(RthJC) 110°C/W 250°C/W Note. RthJA is measured with the PCB copper area of approximately 1 in2 (Multi-layer) that need connect to GND pin of the APE1910 PACKAGE / ORDERING INFORMATION ELECTRICAL SPECIFICATIONS (VIN=5V, VOUT=12V, TA=25℃, unless otherwise specified) Parameter SYM TEST CONDITION MIN TYP MAX UNITS Input Voltage V IN 1.2 - 12 V Quiesceint Current I CCQ VFB=1.5V, Not Switching - 17 30 uA Shutdown Current I SD VEN=0V - - 1 uA Feedback Voltage VFB 1.205 1.23 1.255 V Feedback Bias Current I FB VFB=1.23V - 30 80 nA Line Regulation V Line 1.2V<VIN<12V, Load=10mA - 0.05 0.1 %/V Switching Saturation Voltage V CESAT ISW=300mA - 200 300 mV Switch Current Limit I SW 300 350 400 mA Switch Leakage Current I LEAK Switch-off, VSW=5V - 0.01 5 uA VENH High (regulator ON) 0.9 - - VENL Low (regulator ON) - - 0.25 V EN=1.2V - 2 3 VEN=5V - 8 12 PIN DESCRIPTIONS PIN SYMBOL PIN DESCRIPITON VIN SW FB H : normal operation GND Ground Pin Switch pin. Connect external inductor & diode here Feedback Pin EN Shutdown Pin L : operation stopped IEN Thermal Resistance from Junction to Ambient(RthJA)Note EN Pin Input Current V uA EN Pin Logic Input Threshold Voltage IC Power Supply Pin Package Type Y5 : SOT-23-5L APE1910X VIN EN SW GND FB Top View SOT-23-5L 1 2 3
Electronics Corp. APE1910 BLOCK DIAGRAM
APPLICATION INFORMATION
- + 400nS One Shot VREF 1.23VVIN 5 3FB RC CC Feedback Comparator A1 1S W 2G N D 4EN Shutdown Current-Limit Comparator Driver The small size of ceramic capacitors makes them ideal for APE1910 applications. X5R and X7R types are recommended because they retain thei r capacitance over wider voltage and temperature ranges than other types such as Y5V or Z5U. A 4.7uF input capacitor and a 4.7uF output capacitor are sufficient for most APE1910 applications. A 10uH inductor is recommended for most APE1910 applications. Although small size and high efficiency are major concerns, the inductor should have low core losses and low DCR (copper wire resistance). Schottky diodes with higher current ratings usually have lower forward voltage drop, larger diode capacitance and fast reverse recovery, it is the ideal choices fo r APE1910 applications. The forward voltage drop of a Schottky diode represents the conduction losses in the system, while the diode capacitance (C T or CD) represents the switching losses. For diode selection, both forward voltage drop and diode capacitance need to be considered. When laying out the PC board, the following suggestions should be taken to ensure proper operation of the APE1910. These items are also illustrated graphically in below. 1. The power traces, including the GND trace, the SW trace and the V CC trace should be kept short, direct and wide to allow large current flow. Put enough multiply-layer pads when they need to change the trace layer. 2. Connect the input capacitor C1 to the V CC pin as closely as possible to get good powe r filter effect. 3. Do not trace signal line under inductor.
Electronics Corp. APE1910 TYPICAL PERFORMANCE CHARACTERISTICS 13579 1 1 1 3 VIN (V) Quiescent Current (uA) VIN VS Quiescent Current -50 -25 0 25 50 75 100 Temperature (℃) Quiescent Current (uA) Temperature VS Quiescent Current VIN=12V VIN=5V VIN=1.2V 02468 1 0 1 2 Shutdown Pin Voltage (V) Shutdown Pin Current (uA) Shutdown Pin Voltage VS Shutdwon Pin Current 1.205 1.21 1.215 1.22 1.225 1.23 1.235 1.24 1.245 1.25 1.255 -50 -25 0 25 50 75 100 Temperature (℃) Feedback Voltage (V) Temperature VS Feedback Voltage 0 5 10 15 20 25 30 35 Load Current (mA) Efficiency (%) VIN=2.5V VIN=4.2V VIN=3.3V
Electronics Corp. APE1910 MARKING INFORMATION SOT-23-5L B1YWS Part Number : B1 Year : A = 2010 1 = 2011 Week: A~Z : 01~26 a~z : 27~52 ID Code : Internal