Page No. : 1/7 AX34063AP / AX34063AS DC-to-DC Converter Integrate Circuit Devices 8-Lead Plastic DIP-8 Package Code: P Description The AX34063A Series is a monolithic control circuit containing the primary functions required for DC-to-DC converters. These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This series was specifically by Avantics Microelectronics Corp. • 8-Lead Plastic SO-8 Package Code: S Features • 3V to 40V Input Voltage Operation • Internal 1.6A Peak Current Switch • Internal ±1.8% Reference • Low Quiescent Current at 1.6mA • Frequency Operation from 100Hz~100KHz • Output Voltage Adjustable • Active Current Limiting • Step-Up, Step-Down or Inverting Switching Regulators Pin Connections 8 1 7 2 6 3 5 4 Pin1: Switch Collector (SWC) Pin5: Comparator Inverting Input (FB) Pin2: Switch Emitter (SWE) Pin6: Voltage Supply (Vcc) Pin3: Timing Capacitor (TC) Pin7: Ipk Sense (Ipk) Pin4: Ground (GND) Pin8: Voltage Driver Collector (DRC) Absolute Maxium Rating Parameter Power Supply Voltage Comparator Input Voltage Range Symbol Value Unit VCC 40 V Vir -0.3~+40 V Switch Collector Voltage VC(SW) 40 V Switch Emitter Voltage VSWE 40 V Switch Emitter to Collector Voltage VCE 40 V VC(DR) 40 V Switch Current ISW 1.5 A Power Dissipation at TJ=20oC PD Operating Ambient Temperature Range Topr Driver Collector Voltage Storage Temperature Range Operating Junction Temperature Thermal Resistance Junction-ambient AVANTICS - AX34063AP, AX34063AS DIP-8 1.25 SO-8 0.625 W 0~+70 o C -65~+150 o C Topj 120 o C θJA 125 Tstg o C/W Specification No.: 050308-FE0007 Page No. : 2/7 Electrical Characteristics (V =5V,TA=0~70°C, unless otherwise specified) CC Parameter Symbol Test Condition Min. Typ. Max. Unit 10 25 40 uA 140 190 240 uA KHz Oscillator Charging Current VCC=5~40V, Ta=25oC Ichg Discharge Current o Idischg Frequency VCC=5~40V, Ta=25 C o fOSC Discharge to Charge Current Ratio Current Limit Sense Voltage VPIN5=0, CT=1nF, Ta=25 C 28 33 40 Idischg/Ichg VPIN7=VCC, Ta=25oC 5.2 6 7.5 VIPK Idischg=Ichg, Ta=25oC 250 300 350 mV - 1 1.3 V V Output Switch Saturation Voltage, Darlington Connection Saturation Voltage DC Current Gain VCE(sat) 1 ISW=1A, VC(SW)=VC(DR) VCE(sat) 2 ISW=1A, IC(DR)=50mA hFE Collector Off-State Current ICC(off) ISW=1A, VCE=5V VCE=40V, Ta=25oC - 0.4 0.7 35 120 - - 10 100 uA Comparator Threshold Voltage VFB Threshold Voltage Line Regulation Input Bias Current 1.23 1.25 1.27 V VCC=5~40V - 1.5 6 mV IIB VIN=0V - 40 400 nA ICC VCC=5~40V, VPIN7=VCC, VPin5>VFB, CT=0.001uF, Pin7=GND, Remaining pins open - 1.6 3 mA ∆VFB Total Device Supply Current Block Diagram DRI Pin8: Driver Collector SC Pin1: 1.6A Switch Collector Q Q2 Q1 S R 80Ω SE Pin2: Darlington Switch Emitter IPK CT Oscillator TC Pin3: Oscilletor Timing Capacitor Comparator 1.25V Reference Voltage GND Pin4: Power GND AVANTICS - AX34063AP, AX34063AS IPK Pin7: Highside Current Sense Input, VCC-VIPK=300mV VCC Pin6: Power Supply Input + FB Pin5: Feedback Comparator Inverting Input Specification No.: 050308-FE0007 Page No. : 3/7 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(max)-Vsat) (ton+toff) max 1/Fmin 1/Fmin 1/Fmin -5 -5 CT 4*10 ton 4*10 ton 4*10-5ton IC(sw) 2*Iout(max) 2*Iout(max)(ton+toff/toff) 2*Iout(max)(ton+toff/toff) RS 0.3/IC(sw) 0.3/IC(sw) 0.3/IC(sw) L(min) (Vin(min)-Vsat/Ipk(sw))*ton(max) (Vin(min)-Vsat/Ipk(sw))*ton(max) (Vin(min)-Vsat/Ipk(sw))*ton(max) CO (Ipk(sw)*(ton+toff))/(8*Vripple(P-P)) Iout*ton/Vripple(P-P) Iout*ton/Vripple(P-P) 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. AVANTICS - AX34063AP, AX34063AS Specification No.: 050308-FE0007 Page No. : 4/7 Application Information (Continuos) Fig.2 Step-Up Converter D1 L1 Vout 28V / 200mA 200uH R1 150Ω H1N5819 AX34063A RSC 0.22 Vin C1 100uF 8 1 7 2 6 3 5 4 Cout 220uF CT 680pF RB RA 2.2kΩ 47kΩ 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 AX34063A 8 1 7 2 6 3 5 4 Q1 CT Cout R2 RB RA Fig.4 Step-Down Converter L1 200uH AX34063A RSC 0.25 Vin C1 100uF 8 1 7 2 6 3 5 4 D1 H1N5819 Vout 5V / 500mA Cout 470uF CT 470pF 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 AVANTICS - AX34063AP, AX34063AS Specification No.: 050308-FE0007 Page No. : 5/7 Fig.5 Step-Down Converter With External PNP Saturation Switch AX34063A RSC Vin 8 1 7 2 6 3 5 4 R2 R1 Q1 L1 CT Vout D1 Cout RB C1 RA Fig.6 Voltage Inverting Converter D1 Vout -12V / 100mA AX34063A RSC 0.25 Vin 4.5V-6V 8 1 7 2 6 3 5 4 C1 100uF H1N5819 L1 100uH Cout 470uF CT 680pF 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 AX34063A RSC Vin 8 1 7 2 6 3 5 4 RA R1 R2 Q1 L1 D1 CT Vout C1 RB AVANTICS - AX34063AP, AX34063AS Cout Specification No.: 050308-FE0007 Page No. : 6/7 DIP-8 Dimension Marking: 8 6 7 5 Pb Free Mark Pb-Free: " . " (Note) Normal: None A 1 2 3 4 AX 3 4 0 6 3 A P Control Code Date Code B J Note: Green label is used for pb-free packing Pin Style: 1.SWC 2.SWE 3.TC 4.GND 5.FB 6.VCC 7.Ipk 8.DRC F E C α1 K G Min. 6.29 9.22 3.25 3.17 0.38 2.28 7.49 8.56 0.229 94o Max. 6.40 9.32 *1.52 *1.27 *0.99 3.35 3.55 0.53 2.79 7.74 *3.00 8.81 0.381 97o *: Typical, Unit: mm M H D I Material: • Lead solder plating: Sn60/Pb40 (Normal), Sn/3.0Ag/0.5Cu or Pure-Tin (Pb-free) • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 DIM A B C D E F G H I J K L M α1 L 8-Lead DIP-8 Plastic Package AVANTICS Package Code: P SO-8 Dimension A Marking: G Pb Free Mark 8 7 B 6 2 3 I 5 C Pin1 Index Pb-Free: " . " (Note) A X Normal: None Pin 1 Index Date Code H Pin Style: 1.SWC 2.SWE 3.TC 4.GND 5.FB 6.VCC 7.Ipk 8.DRC K E Part A Part A Control Code Note: Green label is used for pb-free packing 4 J D S 3 4 0 6 3 A M F L N Material: • Lead solder plating: Sn60/Pb40 (Normal), Sn/3.0Ag/0.5Cu or Pure-Tin (Pb-free) • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 DIM A B C D E F G H I J K L M N O Min. 4.85 3.85 5.80 1.22 0.37 3.74 1.45 4.80 0.05 0.30 0.19 0.37 0.23 0.08 0.00 Max. 5.10 3.95 6.20 1.32 0.47 3.88 1.65 5.10 0.20 0.70 0.25 0.52 0.28 0.13 0.15 *: Typical, Unit: mm O 8-Lead SO-8 Plastic Surface Mounted Package AVANTICS Package Code: S Important Notice: • All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of AVANTIC. • AVANTICS reserves the right to make changes to its products without notice. • AVANTICS semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems. • AVANTICS assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. Head Office: • AVANTICS Microelectronics Corp: No. 255, Cai Lun Rd. Zhangjiang Technology Industrial Park Pudong, Shanghai, China Tel: 86-021-58955599 Fax: 86-021-58558038 AVANTICS - AX34063AP, AX34063AS Specification No.: 050308-FE0007 Page No. : 7/7 Soldering Methods for AVANTICS’s Products 1. Storage environment: Temperature=10oC~35oC Humidity=65%±15% 2. Reflow soldering of surface-mount devices Figure 1: Temperature profile tP Critical Zone TL to TP TP Ramp-up TL tL Temperature Tsmax Tsmin tS Preheat 25 Ramp-down t 25oC to Peak Time Profile Feature Sn-Pb Eutectic Assembly Pb-Free Assembly <3 C/sec <3oC/sec - Temperature Min (Tsmin) 100oC 150oC - Temperature Max (Tsmax) 150oC 200oC 60~120 sec 60~180 sec <3oC/sec <3oC/sec 183oC 217oC Average ramp-up rate (TL to TP) o Preheat - Time (min to max) (ts) Tsmax to TL - Ramp-up Rate Time maintained above: - Temperature (TL) - Time (tL) 60~150 sec Peak Temperature (TP) Time within 5oC of actual Peak Temperature (tP) Ramp-down Rate Time 25oC to Peak Temperature o o 60~150 sec 240 C +0/-5 C 260oC +0/-5oC 10~30 sec 20~40 sec <6oC/sec <6oC/sec <6 minutes <8 minutes Peak temperature Dipping time 245 C ±5 C 5sec ±1sec 3. Flow (wave) soldering (solder dipping) Products Pb devices. Pb-Free devices. AVANTICS - AX34063AP, AX34063AS o o o o 260 C +0/-5 C 5sec ±1sec Specification No.: 050308-FE0007