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| Data Sheet 1.5MHz STEP-UP DC-DC CONVERTER General Description The AP3012 is a high power, constant frequency, current mode PWM, inductor based, step-up (boost) converter. The converter operates at high frequency (1.5MHz) so that a small, low profile inductor can be used. The AP3012 has built-in overvoltage protection (OVP) to allow the device goes into shutdown mode when the output voltage exceeds the OVP threshold of 29V. The AP3012 is available in standard SOT-23-5 package. AP3012 Features * * * * * * * * * High Efficiency up to 81% Adjustable Output Voltage up to 29V Shutdown Current 1A Typical 1.5MHz Switching Frequency 36V 500mA Rugged Integrated Bipolar Switch Built-in Soft-Start to Reduce Inrush Current During Start-up On-chip Overvoltage Protection Uses Low ESR Ceramic Output Capacitor Uses Smll Inductor Applications * * * LCD/OLED Display Bias Supply White LED Driver for LCD Display Backlights Cellular Phones SOT-23-5 Figure 1. Package Type of AP3012 Apr. 2007 Rev. 1. 3 1 BCD Semiconductor Manufacturing Limited Data Sheet 1.5MHz STEP-UP DC-DC CONVERTER Pin Configuration K Package (SOT-23-5) AP3012 SW GND FB 1 2 3 5 VIN 4 SHDN Figure 2. Pin Configuration of AP3012 (Top View) Pin Description Pin Number Pin Name Function Switch Pin. Connect inductor/diode here. The output voltage can go up to 29V but should not exceed this limit. If the voltage on this pin is higher than the overvoltage protection (OVP) threshold, the device can go into shutdown mode. It can be restarted by a low to high pulse on the SHDN pin, or by a power on reset on the VIN supply Ground Pin. Connect directly to local ground plane Feedback Pin. Internally compares to 1.25V. Connect R1 and R2 resistor divider here. Calculate the Output Voltage according to the formula: VOUT=1.25V * (1+R1/R2) Shutdown Pin. Connect to 1.5V or higher to enable device (ON), 0.4V or lower to disable device (OFF) Input Supply Pin. Must be locally bypassed 1 SW 2 3 GND FB 4 5 SHDN VIN Apr. 2007 Rev. 1. 3 2 BCD Semiconductor Manufacturing Limited Data Sheet 1.5MHz STEP-UP DC-DC CONVERTER Functional Block Diagram AP3012 OVP 1 DRIVER SW FB VIN 3 COMPARATOR A1 5 VREF 1.25V SOFT START RC CC A2 R S Q Q1 0.2 SHDN 4 GND SHUTDOWN RAMP GENERATOR 2 1.5MHz OSCILLATOR Figure 3. Functional Block Diagram of AP3012 Apr. 2007 Rev. 1. 3 3 BCD Semiconductor Manufacturing Limited Data Sheet 1.5MHz STEP-UP DC-DC CONVERTER Ordering Information AP3012 AP3012 Circuit Type Package K: SOT-23-5 E1: Lead Free TR: Tape and Reel Package SOT-23-5 Temperature Range -40 to 85oC Part Number Lead Free AP3012KTR-E1 Marking ID Lead Free E6B Packing Type Tape & Reel BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Apr. 2007 Rev. 1. 3 4 BCD Semiconductor Manufacturing Limited Data Sheet 1.5MHz STEP-UP DC-DC CONVERTER Absolute Maximum Ratings (Note 1) Parameter Input Voltage SW Voltage FB Voltage SHDN Voltage Thermal Resistance (Junction to Atmosphere, no Heat sink) Operating Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10sec) ESD (Machine Model) ESD (Human Body Model) TSTG TLEAD RJA Symbol VIN Value 20 38 5 16 265 150 -65 to 150 260 250 2000 Unit V V V V oC/W oC o o AP3012 C C V V Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Parameter Input Voltage Operating Temperature Symbol VIN TOP Min 2.6 -40 Max 16 85 Unit V o C Apr. 2007 Rev. 1. 3 5 BCD Semiconductor Manufacturing Limited Data Sheet 1.5MHz STEP-UP DC-DC CONVERTER Electrical Characteristics (VIN=3V, VSHDN=3V, TA=25oC, unless otherwise specified.) Parameter Minimum Operating Voltage Maximum Operating Voltage Feedback Voltage FB Pin Bias Current Supply Current Supply Current Switching Frequency Maximum Duty Cycle Switching Current Limit Switch VCESAT Switch Leakage Current SHDN Voltage High (ON) SHDN Voltage Low (OFF) SHDN Pin Bias Current OVP Voltage Threshold Soft-Start Time VOVP VTH VTL 55 29 550 VCESAT ICC IQ f DMAX Duty Cycle=80% ISW=250mA VSW=5V 1.5 0.4 V A V S VFB VIN=5V, VOUT=24V, IOUT=30mA VFB=1.25V VSHDN =VFB=VIN, No switching VSHDN =0V, VFB=0V 1.1 85 1.17 10 1.25 45 2.5 0.1 1.5 90 500 300 0.01 5 Symbol Conditions Min 2.6 Typ Max Unit V AP3012 16 V 1.33 100 3.5 1.0 1.9 V nA mA A MHz % mA mV A Apr. 2007 Rev. 1. 3 6 BCD Semiconductor Manufacturing Limited Data Sheet 1.5MHz STEP-UP DC-DC CONVERTER Typical Performance Characteristics AP3012 3.0 320 2.5 SHDN Pin Bias Current (A) 280 240 200 160 120 80 40 Quiescent Current (mA) SHDN=10V SHDN=3.6V SHDN=3V SHDN=2.7V 2.0 1.5 -50 C o 25 C o 100 C o 1.0 0.5 0.0 0 4 8 12 16 -50 -25 0 25 50 o 75 100 VIN (V) Junction Temperature ( C) Figure 4. Quiescent Current vs. Input Voltage Figure 5. SHDN Pin Bias Current vs. Junction Temperature 2.0 70 60 Switching Frequency (MHz) Feedback Bias Current (nA) 1.6 50 1.2 40 0.8 30 20 0.4 10 0.0 -50 -25 0 25 50 o 75 100 0 -50 -25 0 25 50 o 75 100 Junction Temperature ( C) Junction Temperature ( C) Figure 6. Switching Frequency vs. Junction Temperature Figure 7. Feedback Bias Current vs. Junction Temperature Apr. 2007 Rev. 1. 3 7 BCD Semiconductor Manufacturing Limited Data Sheet 1.5MHz STEP-UP DC-DC CONVERTER Typical Performance Characteristics (Continued) AP3012 85 1200 80 1000 75 Switching Current Limit (mA) 0 25 50 o 800 Efficiency (%) 70 600 65 60 55 VIN=5V VOUT=24V IOUT=30mA 400 200 50 -50 0 -25 75 100 0 20 40 60 80 100 Junction Temperature ( C) Duty Cycle (%) Figure 8. Efficiency vs. Junction Temperature Figure 9. Switching Current Limit vs. Duty Cycle 1.29 85 1.28 VIN=5V VOUT=24V IOUT=30mA 80 Feedback Voltage (V) Efficiency (%) 1.27 75 1.26 70 1.25 65 VIN=3.0V VIN=3.6V VIN=4.2V VIN=5.0V VOUT=24V L=10H 1.24 -50 -25 0 25 50 o 75 100 60 0 5 10 15 20 25 30 35 40 45 Junction Temperature ( C) Output Current (mA) Figure 10. Feedback Voltage vs. Junction Temperature Figure 11. Efficiency vs. Output Current Apr. 2007 Rev. 1. 3 8 BCD Semiconductor Manufacturing Limited Data Sheet 1.5MHz STEP-UP DC-DC CONVERTER Typical Application VIN 5V L1 10 D1 1N5819 AP3012 VOUT 24V R1 92.82K OFF ON SHDN C1 1F VIN SW C2 1F FB R2 5.1K RLOAD AP3012 GND Note: VOUT=1.25*(1+R1/R2)=1.25*19.2=24V C: X5R or X7R Dielectric L: SUMIDA CDTH3D14/HPNP-100NC or Equivalent Figure 12. LCD/OLED Display Bias Driver Typical Circuit Apr. 2007 Rev. 1. 3 9 BCD Semiconductor Manufacturing Limited Data Sheet 1.5MHz STEP-UP DC-DC CONVERTER Mechanical Dimensions SOT-23-5 Unit: mm(inch) AP3012 2.820(0.111) 3.020(0.119) 0.100(0.004) 0.200(0.008) 2.650(0.104) 2.950(0.116) 1.500(0.059) 1.700(0.067) 0.200(0.008) 0.700(0.028) REF 0.950(0.037) TYP 0.300(0.012) 0.400(0.016) 1.800(0.071) 2.000(0.079) 0.300(0.012) 0.600(0.024) 0 8 1.050(0.041) 1.250(0.049) 0.000(0.000) 0.100(0.004) 1.050(0.041) 1.150(0.045) Apr. 2007 Rev. 1. 3 10 BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others. MAIN SITE - Headquarters BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited - Wafer Fab No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China Shanghai SIM-BCD Semiconductor Manufacturing Limited Tel: +86-21-24162266, Fax: +86-21-24162277 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 REGIONAL SALES OFFICE Shenzhen Office REGIONAL SALES OFFICE - Wafer Fab BCD Semiconductor Manufacturing Limited Shanghai Design Group - IC SIM-BCD Semiconductor Manufacturing Co., Ltd. 800 Yi Shan Road, Shanghai 200233, China Corporation Advanced Analog Circuits (Shanghai) Tel: +86-21-6485 900, Yi Shan Road, Shanghai 200233, China 8F, Zone B, 1491, Fax: +86-21-5450 0008 Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 USA Office BCD Semiconductor Corp. USA Office 30920 Huntwood Ave. Hayward, BCD Semiconductor Corporation CA 94544, USA 30920 Huntwood Ave. Hayward, Tel 94544, U.S.A CA : +1-510-324-2988 Fax: +1-510-324-2788 Tel : +1-510-324-2988 Fax: +1-510-324-2788 Taiwan Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office BCD Taiwan Office (Taiwan) Company Limited Semiconductor Shenzhen Office Room E, SIM-BCD Semiconductor 3rd Fuzhong Road, Futian District, Shenzhen, 4F, 298-1, Rui Guang Road,(Taiwan) Company Limited Shanghai 5F, Noble Center, No.1006,Manufacturing Co., Ltd. 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