AP3012

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 1µA 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 Small 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 Oct. 2009 Rev. 1. 5 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 1 Pin Name SW 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 2 3 GND FB 4 5 SHDN VIN Oct. 2009 Rev. 1. 5 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 Σ 0.2 Ω SHDN 4 SHUTDOWN 2 RAMP GENERATOR GND 1.5MHz OSCILLATOR Figure 3. Functional Block Diagram of AP3012 Oct. 2009 Rev. 1. 5 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 G1: Green TR: Tape and Reel Package SOT-23-5 Temperature Range -40 to 85oC Part Number Lead Free AP3012KTR-E1 Marking ID Lead Free E6B G6B Green AP3012KTR-G1 Green Packing Type Tape & Reel BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green package. Oct. 2009 Rev. 1. 5 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 RθJA 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 Oct. 2009 Rev. 1. 5 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 Thermal Resistance (Junction to Case) θJC VOVP VTH VTL 55 29 550 69.57 o AP3012 Symbol Conditions Min 2.6 Typ Max Unit V 16 VFB VIN=5V, VOUT=24V, IOUT=30mA VFB=1.25V ICC IQ f DMAX Duty Cycle=80% VCESAT ISW=250mA VSW=5V 1.5 0.4 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 1.33 100 3.5 1.0 1.9 V V nA mA µA MHz % mA mV µA V µA V µS C/W Oct. 2009 Rev. 1. 5 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 (µA) 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 40 30 20 10 0 -50 1.2 0.8 0.4 0.0 -50 -25 0 25 50 o 75 100 -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 Oct. 2009 Rev. 1. 5 7 BCD Semiconductor Manufacturing Limited Data Sheet 1.5MHz STEP-UP DC-DC CONVERTER Typical Performance Characteristics (Continued) AP3012 85 80 75 1200 1000 Switching Current Limit (mA) 0 25 50 o 800 Efficiency (%) 70 65 60 55 50 -50 600 VIN=5V VOUT=24V IOUT=30mA 400 200 -25 75 100 0 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=10µH 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 Oct. 2009 Rev. 1. 5 8 BCD Semiconductor Manufacturing Limited Data Sheet 1.5MHz STEP-UP DC-DC CONVERTER Typical Application VIN 5V L1 10µΗ D1 1N5819 AP3012 VOUT 24V OFF ON SHDN C1 1µF VIN SW R1 92.82K C2 1µ F AP3012 GND FB R2 5.1K RLOAD 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 Oct. 2009 Rev. 1. 5 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) 2.950(0.116) 2.650(0.104) 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° 1.450(0.057) MAX 0.000(0.000) 0.100(0.004) 0.900(0.035) 1.300(0.051) Oct. 2009 Rev. 1. 5 10 BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifiBCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. 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