CYStech Electronics Corp. Spec. No. : C501Q8 Issued Date : 2003.03.21 Revised Date :2013.10.17 Page No. : 1/ 10 DC-to-DC Converter Control Circuit MC34063AQ8 Description The MC34063AQ8 is a monolithic control circuit containing the primary functions required for DC-to-DC converters. This device consists of an internal temperature compensated reference, comparator, control- led duty cycle oscillator with an active current limit circuit, driver and high current output switch. Features • 3V to 40V Input Voltage Operation • Low Quiescent Current at 1.6mA • Internal 1.6A Peak Current Switch • Frequency Operation from 100Hz~100KHz • Internal ±1.8% Reference • Current Limiting • Pb-free lead plating and halogen-free package Applications • Saver for Cellular Phone • DC-DC Converter Module Ordering Information Device MC34063AQ8-0-T3-G Package SOP-8 (Pb-free lead plating and halogen-free package) Shipping 2500 pcs / tape & reel Environment friendly grade : S for RoHS compliant products, G for RoHS compliant and green compound products Packing spec, T3 : 2500 pcs / tape & reel, 13” reel Product rank, zero for no rank products Product name MC34063AQ8 CYStek Product Specification Spec. No. : C501Q8 Issued Date : 2003.03.21 Revised Date :2013.10.17 Page No. : 2/ 10 CYStech Electronics Corp. Typical Application Circuit L1 200μH Fig1.Saver Circuit for Cellular Phone Vout MC34063A RSC Vin 8 1 7 2 6 3 5 4 D1 1N5819 Cout 220μF CT 470pF RB 33kΩ C1 100μF RA 5.6kΩ MC34063AQ8 CYStek Product Specification Spec. No. : C501Q8 Issued Date : 2003.03.21 Revised Date :2013.10.17 Page No. : 3/ 10 CYStech Electronics Corp. Pin Connections 8 7 6 5 1 2 3 4 Pin1:Switch Collector Pin2:Switch Emitter Pin3:Timing Capacitor Pin4:Gnd Pin5:Comparator Inverting Input Pin6:Vcc Pin7:Ipk Sense Pin8:Driver Collector Absolute Maximum Rating Supply Voltage ....................................................................................................................................... 40 V Comparator Input Voltage Range ........................................................................................... -0.3 V ~ 40 V Switch Collector Voltage ....................................................................................................................... 40 V Switch Emitter Voltage .......................................................................................................................... 40 V Switch Collector to Emitter Voltage ...................................................................................................... 40 V Driver Collector Voltage ........................................................................................................................ 40 V Switch Current ....................................................................................................................................... 1.6A Power Dissipation @ Ta=25°C......................................................................................................... 625 mW Thermal Resistance Junction to Air............................................................................................. 160 °C / W Operating Junction Temperature......................................................................................................... 125 °C Operating Ambient Temperature Range......................................................................................... 0 ~ 70 °C Storage Temperature Range.................................................................................................. -40 °C ~ 125 °C Electrical Characteristics (Vcc=5V,Ta=25°C, unless otherwise specified) Parameter Oscillator Frequency Charging Current Discharge Current Voltage Amplitude Discharge to Charge Current Ratio Current Limit Sense Voltage Output Switch Saturation Voltage, Darlington Connection Saturation Voltage DC Current Gain Collector Off-State Current Comparator Threshold Voltage Threshold Voltage Line Regulation Input Bias Current Supply Current MC34063AQ8 Test Condition Vpin 5=0V, CT=1nF 5.0V≤VCC≤40V 5.0V≤VCC≤40V Pin3 VIPK(Sense) =VCC IChg=Idischg ISW=1.0A, VC(Driver)=VC(Switch) ISW=1.0A, IC(Driver)=50mA (Forced β ≈ 20) ISW=1.0A, VCE=5.0V VCE=40V 0°C≤Ta≤70°C 3.0V≤VCC≤40V VIN=0V VIPK(Sence)=VCC VPin5>VFB, 5.0V≤VCC≤40V CT=1nF, Pin2=Gnd Remaining pins open Symbol Min. Typ. Max. Unit fOSC Ichg Idischg VOSC IDischg/Ichg VIPK(Sence) 30 30 180 5.2 250 38 38 240 0.6 6.5 300 45 45 290 7.5 350 kHz μA μA V mV VCE(Sat) - 1.0 1.3 V VCE(Sat) - 0.45 0.8 V hFE ICC(Off) 50 - 75 0.01 100 μA VTH Regline IIB ICC 1.225 1.250 1.275 1.210 1.290 1.4 5 -20 -400 - 1.6 4 V mV nA mA CYStek Product Specification CYStech Electronics Corp. Spec. No. : C501Q8 Issued Date : 2003.03.21 Revised Date :2013.10.17 Page No. : 4/ 10 Block Diagram SC Pin1:1.6A Switch Collector Q2 Q Q1 DRI Pin8:Driver Collector S R 80Ω SE Pin2:Darlington Switch Emitter CT IPK Oscillator TC Pin3:Oscilletor Timing Capacitor Comparator 1.25V Reference Voltage IPK Pin7:Highside Current Sense Input, VCC-VIPK=300mV VCC Pin6:Power Supply Input + - GND Pin4:Power GND FB Pin5:Feedback Comparator Inverting Input Application Information Design Formula Table Calculation Step-Down Step-Up Voltage-Inverting ton / toff Vout+VF / Vin(min) -Vsat-VOut Vout+VF-Vin(min) / Vin(min)-Vsat |Vout| + VF / Vin-Vsat (ton + toff) max 1/Fmin 1/Fmin 1/Fmin CT 4*10-5ton 4*10-5ton 4*10-5ton IC(switch) 2*Iout(max) 2*Iout(max)(ton+toff/toff) 2*Iout(max)(ton+toff/toff) RS 0.3 / IC(switch) 0.3 / IC(switch) 0.3 / IC(switch) (Vin(min)-Vsat-Vout / IC(switch)) (Vin(min)-Vsat / IC(switch)) (Vin(min)-Vsat/ IC(switch)) *ton(max) *ton(max) *ton(max) IC(switch)*(ton+toff) / 8VRipple(P-P) Iout*ton / VRipple(P-P) Iout*ton / VRipple(P-P) L(min) CO Vsat : Saturation voltage of the output switch. VF : Forward voltage drop of the ringback rectifier. The following power supply characteristics must be chosen : Vin : Nominal input voltage. Vout : Desired output voltage. |Vout|=1.25*(1+RB/RA) Iout - Desired output current Fmin : Minimum desired output switching frequency at the selected values for Vin and Iout. VRipple(P-P) : Desired peak to peak output ripple voltage in practice, the calculated value will need to be increased due to the capacitor equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly effect the line and load regulation. MC34063AQ8 CYStek Product Specification Spec. No. : C501Q8 Issued Date : 2003.03.21 Revised Date :2013.10.17 Page No. : 5/ 10 CYStech Electronics Corp. Application Information (Continued) Fig.2 Step-Up Converter R1 150Ω L1 D1 200μH MC34063A 1N5819 RSC 0.22Ω Vin C1 100μF 8 1 7 2 6 3 5 4 Vout 28V / 200mA Cout 220μF CT 680ρF RB 47kΩ RA 2.2kΩ Line Regulation : 100mV (Vin=8V~16V, @Io=200mA) Load Regulation : 5mV (Vin=12V, @Io=80mA~200mA) Fig.3 Step-Up Converter With External NPN Switch L1 R1 RSC Vin C1 Vout D1 MC34063A 8 1 7 2 6 3 5 4 Q1 CT Cout R2 RB RA Fig.4 Step-Down Converter L1 200μH MC34063A RSC 0.25Ω Vin C1 100μF 8 1 7 2 6 3 5 4 CT 470ρF D1 1N5819 Vout 5V / 500mA Cout 470μF RB 3.6kΩ RA 1.2kΩ Line Regulation : 40mV (Vin=10V~20V, @Io=500mA) Load Regulation : 5mV (Vin=15V, @Io=10mA~500mA) Short Circuit Current : 1.3A (Vin=15V, @RL=0.1Ω) MC34063AQ8 CYStek Product Specification Spec. No. : C501Q8 Issued Date : 2003.03.21 Revised Date :2013.10.17 Page No. : 6/ 10 CYStech Electronics Corp. Application Information (Continued) Fig.5 Step-Down Converter With External PNP Saturation Switch MC34063A R1 R2 RSC Vin 8 1 7 2 6 3 5 4 Q1 L1 CT Vout D1 Cout RB C1 RA Fig.6 Voltage Inverting Converter MC34063A RSC 0.25Ω Vin 4.5V-6V 8 1 7 2 6 3 5 4 C1 100μF Vout -12V / 100mA D1 1N5819 L1 100μH Cout 470μF CT 680ρF RA 953Ω RB 8.2kΩ Line Regulation : 20mV (Vin=4.5V~6V, @Io=100mA) Load Regulation : 100mV (Vin=5V, @Io=10mA~100mA) Fig.7 Voltage Inverting Converter With External PNP Saturation Switch MC34063A R1 RSC Vin 8 1 7 2 6 3 5 4 RA R2 Q1 L1 D1 CT Vout C1 RB MC34063AQ8 Cout CYStek Product Specification Spec. No. : C501Q8 Issued Date : 2003.03.21 Revised Date :2013.10.17 Page No. : 7/ 10 CYStech Electronics Corp. Characteristic Curves Emitter Follower Configuration Output Saturation Voltage vs Emitter Current Output Switch On-Off Time vs Oscillator Timing Capacitance 1.8 VCC=5.0V Pin 7=VCC Pin 5=GND TA=25℃ 100 Saturation Voltage---VCE(sat)(V) Output Switch On-Off Time---ton-off(us 1000 ton 10 toff 1.6 1.5 VCC=5V Pins 1,7,8=VCC Pins 3,5=Gnd TA=25℃ (See Note ) 1.4 1.3 1.2 1.1 1 0.1 1 Oscillator Timing Capacitance---CT(nF) 0 10 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 Emitter Current---IE(A) Common Emitter Configuration Output Switch Saturation Voltage vs Collector Current 1.1 1 0.9 Darlington Connection 0.8 VCC=5V 0.7 Pin 7=VCC 0.6 Pins 2,3,5=Gnd TA=25℃ 0.5 (See Note) 0.4 Forced β=20 0.3 0.2 0.1 0 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 Collector Current---IC(A) Current Limit Sense Voltage vs Temperature Current Limit Sense Voltage---VIPK(V) Saturation Voltage---VCE(sat)(V) 1 0.01 1.7 400 380 VCC=5.0V Ichg=Idischg 360 340 320 300 280 260 240 220 200 -75 -50 -25 0 25 50 75 100 125 Ambient Temperature---TA(℃) Standby Supply Current vs Supply Voltage Note: Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 3.6 Supply Current---I CC(mA) 3.2 2.8 2.4 2 1.6 CT=10nF Pin 7=VCC Pin 2=Gnd 1.2 0.8 0.4 0 0 5 10 15 20 25 30 35 40 Supply Voltage---VCC(V) MC34063AQ8 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C501Q8 Issued Date : 2003.03.21 Revised Date :2013.10.17 Page No. : 8/ 10 Reel Dimension Carrier Tape Dimension MC34063AQ8 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C501Q8 Issued Date : 2003.03.21 Revised Date :2013.10.17 Page No. : 9/ 10 Recommended wave soldering condition Product Pb-free devices Peak Temperature 260 +0/-5 °C Soldering Time 5 +1/-1 seconds Recommended temperature profile for IR reflow Profile feature Average ramp-up rate (Tsmax to Tp) Preheat −Temperature Min(TS min) −Temperature Max(TS max) −Time(ts min to ts max) Time maintained above: −Temperature (TL) − Time (tL) Peak Temperature(TP) Time within 5°C of actual peak temperature(tp) Ramp down rate Time 25 °C to peak temperature Sn-Pb eutectic Assembly Pb-free Assembly 3°C/second max. 3°C/second max. 100°C 150°C 60-120 seconds 150°C 200°C 60-180 seconds 183°C 60-150 seconds 240 +0/-5 °C 217°C 60-150 seconds 260 +0/-5 °C 10-30 seconds 20-40 seconds 6°C/second max. 6°C/second max. 6 minutes max. 8 minutes max. Note : All temperatures refer to topside of the package, measured on the package body surface. MC34063AQ8 CYStek Product Specification Spec. No. : C501Q8 Issued Date : 2003.03.21 Revised Date :2013.10.17 Page No. : 10/ 10 CYStech Electronics Corp. SO-8 Dimension Right side View G Top View A Marking: I C B Date Code H 34063A □□□□ J E D K Front View Part A Part A M L N O F 8-Lead SO-8 Plastic Package CYStek Package Code: Q8 *: Typical Inches Min. Max. 0.1909 0.2007 0.1515 0.1555 0.2283 0.2441 0.0480 0.0519 0.0145 0.0185 0.1472 0.1527 0.0570 0.0649 0.1889 0.2007 DIM A B C D E F G H Millimeters Min. Max. 4.85 5.10 3.85 3.95 5.80 6.20 1.22 1.32 0.37 0.47 3.74 3.88 1.45 1.65 4.80 5.10 DIM I J K L M N O Inches Min. Max. 0.0019 0.0078 0.0118 0.0275 0.0074 0.0098 0.0145 0.0204 0.0118 0.0197 0.0031 0.0051 0.0000 0.0059 Millimeters Min. Max. 0.05 0.20 0.30 0.70 0.19 0.25 0.37 0.52 0.30 0.50 0.08 0.13 0.00 0.15 Notes: 1.Controlling dimension: millimeters. 2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material. 3.If there is any question with packing specification or packing method, please contact your local CYStek sales office. Material: • Lead: Pure tin plated. • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0. Important Notice: • All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek. • CYStek reserves the right to make changes to its products without notice. • CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems. • CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. MC34063AQ8 CYStek Product Specification