Advanced Power Electronics Corp. APE1910 STEP-UP PFM DC/DC CONVERTER FEATURES DESCRIPTION Input Voltage : 1.2V to 12V Low Quiescent Current : 17uA (typ.) Low Saturation Voltage : 200mV Typical at 300mA 350mA Typical Switching Current Limiting High Output Voltage : up to 34V Low Profile SOT-23-5L Pb-Free Packaging Halogen Free Product The APE1910 is a Pulse Frequency Modulation (PFM) DC/DC converter. It is Low quiescent current 30uA and shutdown current less 1uA. The APE1910 feature a wide input voltage. The operating voltage is ranged from 1.2V to 12V. It also feature low quiescent current, switching current limiting, low temperature coefficient. Smaller package size and fewer tiny external components are required in the application to save space and lower cost. APE1910 is available in SOT-23-5L TYPICAL APPLICATION L1 VIN=5V 1 2 1 Vout=30V 2 22uH' D1 B140 R3 4.7M C1 VIN SW GND FB 4.7uF/25V EN R1 100K C3 4.7u/50V APE1910 C2 R2 200K option Vout= VFB x (1 + R3/R2) VFB=1.23V, R2 suggest 100K~300K Figure 1. VCC=5V/ VOUT=30V for LCE.OLED Bias Supply L1 VIN=1.2V~2.5V 1 2 10uH 1 Vout=3.3V 2 D1 B140 R3 202K C1 4.7uF/25V VIN EN R1 100K SW GND FB C4 10pF C3 4.7u/50V APE1910 C2 Option R2 120K Vout=VFB x (1 + R3/R2) VFB=1.23V, R2 Suggest 100K~300K Figure 2. VCC=1.2~2.5V/ VOUT=3.3V for 1 or 2 cells to 3.3V boost converter Data and specifications subject to change without notice 1 20130108V1.1 Advanced Power Electronics Corp. APE1910 ABSOLUTE MAXIMUM RATINGS VIN Pin Voltage(VIN) ---------------------------------------- 15V SW Voltage(VSW ) ------------------------------------------- 36V Feedback Pin Voltage(VFB) ------------------------------ VIN EN Pin Voltage(VEN) --------------------------------------- 15V Maximum Junction Temperature(T J) ------------------ 150°C Storage Temperature Range(T ST) --------------------- -40°C To 150°C Operating Temperature Range(T OP) ------------------ -40°C To 125°C Power Dissipation(PD) ------------------------------------- 0.4W Thermal Resistance from Junction to Case(Rth JC) 110°C/W Thermal Resistance from Junction to Ambient(Rth JA)Note 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 Top View VIN EN 4 5 APE1910X Package Type 1 Y5 : SOT-23-5L 2 3 SW GND FB SOT-23-5L ELECTRICAL SPECIFICATIONS (VIN=5V, VOUT=12V, TA=25℃, unless otherwise specified) Parameter SYM TEST CONDITION MIN TYP MAX UNITS Input Voltage VIN 1.2 - 12 V Quiesceint Current ICCQ VFB=1.5V, Not Switching - 17 30 uA Shutdown Current VEN=0V - - 1 uA Feedback Voltage ISD VFB 1.205 1.23 1.255 V Feedback Bias Current IFB VFB=1.23V - 30 80 nA 1.2V<VIN<12V, Load=10mA - 0.05 0.1 %/V Line Regulation VLine Switching Saturation Voltage VCESAT - 200 300 mV 300 350 400 mA Switch-off, VSW =5V - 0.01 5 uA VENH High (regulator ON) 0.9 - - VENL Low (regulator ON) - - 0.25 VEN=1.2V - 2 3 VEN=5V - 8 12 Switch Current Limit ISW Switch Leakage Current ILEAK EN Pin Logic Input Threshold Voltage EN Pin Input Current IEN ISW =300mA V uA PIN DESCRIPTIONS PIN SYMBOL VIN PIN DESCRIPITON IC Power Supply Pin SW Switch pin. Connect external inductor & diode here FB Feedback Pin Shutdown Pin EN H : normal operation L : operation stopped GND Ground Pin 2 Advanced Power Electronics Corp. APE1910 BLOCK DIAGRAM 1 SW Driver Feedback Comparator RC - A1 + CC 400nS One Shot - VREF 1.23V + Current-Limit Comparator FB 3 VIN 5 Q1 2 GND EN 4 Shutdown Current-Limit Reference APPLICATION INFORMATION Capacitor Selection The small size of ceramic capacitors makes them ideal for APE1910 applications. X5R and X7R types are recommended because they retain their 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. Inductor Selection 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). Diode Selection Schottky diodes with higher current ratings usually have lower forward voltage drop, larger diode capacitance and fast reverse recovery, it is the ideal choices for APE1910 applications. The forward voltage drop of a Schottky diode represents the conduction losses in the system, while the diode capacitance (CT or CD) represents the switching losses. For diode selection, both forward voltage drop and diode capacitance need to be considered. PCB Layout Guide 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 VCC 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 VCC pin as closely as possible to get good power filter effect. 3. Do not trace signal line under inductor. 3 Advanced Power Electronics Corp. APE1910 TYPICAL PERFORMANCE CHARACTERISTICS Temperature VS Quiescent Current 25 24 24 23 23 Quiescent Current (uA) Quiescent Current (uA) VIN VS Quiescent Current 25 22 21 20 19 18 17 16 VIN=12V 22 21 20 VIN=5V 19 18 VIN=1.2V 17 16 15 15 1 3 5 7 9 11 13 -50 -25 0 VIN (V) Shutdown Pin Voltage VS Shutdwon Pin Current 50 75 100 Temperature VS Feedback Voltage 40 1.255 1.25 35 1.245 30 Feedback Voltage (V) Shutdown Pin Current (uA) 25 Temperature (℃) 25 20 15 10 1.24 1.235 1.23 1.225 1.22 1.215 5 1.21 0 1.205 0 2 4 6 8 10 12 -50 -25 0 25 50 75 100 Temperature (℃) Shutdown Pin Voltage (V) 90 VIN=4.2V 80 Efficiency (% ) 70 60 VIN=2.5V VIN=3.3V 50 40 30 20 10 0 0 5 10 15 20 25 30 35 Load Current (mA) 4 Advanced Power Electronics Corp. APE1910 MARKING INFORMATION SOT-23-5L B1YWS Part Number : B1 Week: A~Z : 01~26 a~z : 27~52 ID Code : Internal Year : A = 2010 1 = 2011 ： ： 5