Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER General Description Features The AZ34063 is a monolithic switching regulator control circuit containing the primary functions required for DC-DC converters. This device consists of internal temperature compensated reference, voltage comparator, controlled duty cycle oscillator with active current limit circuit, driver and high current output switch. This device is specifically designed to be used in Step-Down, Step-Up and Voltage-Inverting applications with a minimum number of external components. • • • • • • • The AZ34063 is available in 2 packages: SOIC-8 and DIP-8. g g g g AZ34063 Operation from 3.0V to 36V Input Low Standby Current Current Limiting Output Switch Current to 0.8A Output Voltage Adjustable Operation Frequency up to 65KHz (CT=330pF) Precision 2% Reference Applications SOIC-8 Battery Chargers NICs/ Switches/ Hubs ADSL Modems Negative Voltage Power Supplies DIP-8 Figure 1. Package Types of AZ34063 BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 2. 1 1 Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063 Pin Configuration P/M Package (DIP-8/SOIC-8) Switch Collector Switch Emitter Timing Capacitor GND 1 8 Driver Collector 2 7 IPK Sense 3 6 VCC 4 5 Comparator Inverting Input Top View Figure 2. Pin Configuration of AZ34063 Functional Block Diagram Driver Collector % 6 $ 1 Switch Collector Switch Emitter Timing Capacitor GND 4 5 IPK Sense ,SN ,3. &7 26& VCC 9 5HIHUHQFH 5HJXODWRU Comparator Inverting Input Figure 3. Functional Block Diagram of AZ34063 BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 2. 1 2 Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063 Pin Description Pin Number Pin Name Function 1 Switch Collector 2 Switch Emitter 3 Timing Capacitor 4 GND 5 Comparator Inverting Input 6 VCC 7 IPK Sense 8 Driver Collector Internal switch transistor collector Internal switch transistor emitter Timing Capacitor to control the switching frequency Ground pin for all internal circuits Inverting input pin for internal comparator Voltage supply Peak Current Sense Input by monitoring the voltage drop across an external I sense resistor to limit the peak current through the switch Voltage driver collector Ordering Information AZ34063 - Circuit Type E1: Lead Free Blank: Tin Lead Package TR: Tape and Reel Blank: Tube M: SOIC-8 P: DIP-8 Package Temperature Range SOIC-8 -40 to 85oC DIP-8 -40 to 85oC Part Number Tin Lead Marking ID Lead Free Tin Lead Lead Free Packing Type AZ34063M AZ34063M-E1 34063M 34063M-E1 Tube AZ34063MTR AZ34063MTR-E1 34063M 34063M-E1 Tape & Reel AZ34063P AZ34063P-E1 AZ34063P AZ34063P-E1 Tube BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 2. 1 3 Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Power Supply Voltage VCC 40 V Comparator Input Voltage Range VIR -0.3 to 7 V Switch Collector Voltage VC(switch) 40 V Switch Emitter Voltage (Vpin1=40V) VE(switch) 40 V Switch Collector to Emitter Voltage VCE(switch) 40 V Driver Collector Voltage VC(driver) 40 V Driver Collector Current (Note 2) IC(driver) 100 mA ISW 0.8 A PD RTJ 1.25 100 W ć /W PD RTJA 625 160 mW ć /W TJ 150 ć TSTG -65 to 150 ć 2000 V Switch Current Power Dissipation and Thermal Characteristics Plastic Package, Power Dissipation (TA = 25 ć ) Thermal Resistance SOIC Package, Power Dissipation (TA = 25 ć ) Thermal Resistance Operating Junction Temperature Storage Temperature Range ESD (Human body model) 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. Note 2: Maximum package power dissipation limits must be observed. Recommended Operating Conditions Parameter Supply Voltage Ambient Temperature Symbol Min Max Unit VCC 3 36 V TA -40 85 o C BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 2. 1 4 Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063 Electrical Characteristics (VCC = 5.0 V, TA = -40 to 85oC, unless otherwise specified.) Parameter Symbol Conditions Min Typ Max Unit CT = 1.0 nF 24 33 42 KHz CT = 330 pF 50 65 80 KHz VCC = 5.0 V to 36 V, TA = 25oC 24 35 42 PA 140 220 260 PA 5.2 6.5 7.5 250 300 350 mV OSCILLATOR Frequency fOSC Charge Current ICHG Discharge Current Discharge to Charge Current Ratio IDISCHG VPin 5 = 0 V, TA = 25oC o VCC = 5.0 V to 36 V, TA = 25 C IDISCHG/ICHG Pin 7 to V , T = 25oC CC A Current Limit Sense VIPK(sense) ICHG = IDISCHG, TA = 25oC OUTPUT SWITCH (Note 3) Saturation Voltage, Dalington Connection VCE(sat) ISW = 0.6 A, Pins 1, 8 connected 1.0 1.3 V Saturation Voltage (Note 4) VCE(sat) ISW = 0.6 A, RPin 8 = 82 : to VCC, Forced E = 20 0.45 0.8 V 100 PA DC Current Gain Collector Off-State Current hFE ISW = 0.6 A, VCE = 5.0 V, IC(off) VCE = 36 V 0.01 VTH TA = 25oC 1.225 1.250 1.275 TA = -40 to 85oC 1.21 50 75 COMPARATOR Threshold Voltage Threshold Voltage Line Regulation Input Bias Current REGLINE V 1.29 VCC = 3.0 V to 36 V 1.4 5 mV IIB VIN = 0 V -20 -400 nA ICC VCC = 5.0 V to 36 V, CT = 1.0 nF, Pin 7 = VCC, VPin 5 > VTH, Pin 2 = GND, other pins open 4 mA TOTAL DEVICE Supply Current Note 3: Low duty cycle pulse technique are used during test to maintain junction temperature as close to ambient temperature as possible. Note 4: If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents (d 300mA) and high driver currents (t 30mA), it may take up to 2.0us for it to come out of saturation. This condition will shorten the off time at frequencies 30KHz, and is magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non-Darlington configuration is used, the following output drive condition is recommended: BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 2. 1 5 Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063 Electrical Characteristics (Continued) Forced E of output switch: IC output t10 IC driver - 7.0mA* * The 100: resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts. 100 VCC=5.0V Pin 7=VCC Pin 5=Gnd O TA=25 C Vosc. Oscillator Voltage (V) 200mV/DIV ton-off. Output Switch On-Off Time (Ps) Typical Performance Characteristics ton 10 toff 1 0.01 0.1 1 10 CT. Oscillator Timing Capacitor (nF) Time. 10Ps/DIV Figure 4. Output Switch On-Off Time vs. Oscillator Timing Capacitor Figure 5. Timing Capacitor Waveform BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 2. 1 6 Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063 Typical Performance Characteristics (Continued) 2.0 1.4 1.3 1.9 1.2 1.7 1.6 1.5 1.4 1.3 VCC=5.0V Pin 1,7,8=VCC Pin 3,5=GND O TA=25 C 1.2 1.1 1.0 0.0 Darlington Connection 1.1 Saturation Voltage (V) Saturation Voltage (V) 1.8 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.0 0.9 0.8 0.7 Forced E=20 0.6 0.5 0.4 VCC=5.0V Pin 7=VCC Pin 2,3,5=GND O TA=25 C 0.3 0.2 0.1 0.0 0.0 1.1 0.1 0.2 Emitter Current (A) 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 Collector Current (A) Figure 6. Emitter Follower Configuration Output Saturation Voltage vs. Emitter Current Figure 7. Common Emitter Configuration Output Switch Saturation Voltage vs. Collector Current 3.5 3.0 330 ICC. Supply Current (mA) Current Limit Sense Voltage (mV) 340 320 VCC=5V ICHG=IDISCHG 310 300 2.5 2.0 CT=1.0nF Pin 7=VCC Pin 2=GND 1.5 290 1.0 280 -60 -40 -20 0 20 40 60 80 100 120 0.5 140 0 O Temperature ( C) 5 10 15 20 25 30 35 40 VCC. Supply Voltage (V) Figure 8. Current Limit Sense Voltage vs. Temperature Figure 9. Standby Supply Current vs. Supply Voltage BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 2. 1 7 Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063 Typical Applications L1 220PH 5 1 8 % 6 $ 4 5 2 7 ,SN ,3. 5VF 9LQ9 26& ' 1 &7 6 & P) 3 &7 S ) 9 5HIHUHQFH 5HJXODWRU 5 4 /P+ 8$=& 5 N 9RXW 9RXW 9P$ 5N & P) 2SWLRQDO )LOWHU & P) Figure 10. Step-Up Converter (Note 5) Note 5: This is a typical step-up converter configuration. In the steady state, if the resistor divider voltage at pin 5 is greater than the voltage in the non-inverting input, which is 1.25V determined by the internal reference, the output of the comparator will go low. At the next swithching period, the output switch will not conduct and the output voltage will eventually drop below its nominal voltage until the divider voltage at pin 5 is lower than 1.25V. Then the output of the comparator will go high, the output switch will be allowed to conduct. Since Vpin5 = VOUT * R2/(R1+R2) = 1.25(V), the output voltage can be decided by VOUT = 1.25 * (R1+R2)/R2 (V). BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 2. 1 8 Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063 Typical Applications (Continued) 8 1 B S A Q R 7 Ipk IPK Rsc 0.4 0.33 Vin 25V 2 OSC D1 1N5819 CT + C1 100PF L1 220PH 220 PH 3 6 CT 470 pF 1.25V Reference Regulator + - 4 5 L2 1.0 PH U1 AZ34063 R1 3.6k + R2 1.2k Vout Vout 5V/500mA C2 470 PF + Optional Filter C3 100 PF Figure 11. Step-Down converter (Note 6) Note 6: This is a typical step-down converter configuration. The working process in the steady state is similar to step-up converter, Vpin5 = VOUT * R2/(R1+R2) = 1.25 (V), the output voltage can be decided by VOUT = 1.25 * (R1+R2)/R2 (V). BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 2. 1 9 Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063 Typical Applications (Continued) 8 1 B S A Q R 7 Ipk IPK OSC L1 88 P+ CT 3 6 Vin 4.5-6V + C1 100 PF 1.25V Reference Regulator + - CT 1500pF D1 1N5819 4 5 U1 AZ34063 L2 1.0 P+ Vout Vout -12V/100mA R1 953 R2 8.2k C2 1000 PF Optional Filter + Rsc 0.24 2 C3 100 PF + Figure 12. Voltage Inverting Converter (Note 7) Note 7: This is a typical inverting converter configuration. The working process in the steady state is similar to step-up converter, the difference in this situation is that the voltage at the non-inverting pin of the comparator is equal to 1.25V+VOUT, then Vpin5 = VOUT * R2/(R1+R2) = 1.25V+VOUT, so the output voltage can be decided by VOUT = -1.25 * (R1+R2)/R1 (V). BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 2. 1 10 Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063 Mechanical Dimensions SOIC-8 Unit: mm(inch) 4.800(0.189) 5.000(0.197) 7e 0.320(0.013) 1.350(0.053) 1.750(0.069) 8e 8e 7e 0.675(0.027) 0.725(0.029) D 5.800(0.228) 1.270(0.050) 6.200(0.244) TYP D 20:1 0.300(0.012) R0.150(0.006) 0.100(0.004) ¶ 0.800(0.031) 0.200(0.008) 0e 8e 1.000(0.039) 3.800(0.150) 4.000(0.157) 1e 5e 0.330(0.013) 0.510(0.020) 0.900(0.035) R0.150(0.006) 0.190(0.007) 0.250(0.010) BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 2. 1 11 Data Sheet 0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063 Mechanical Dimensions (Continued) DIP-8 Unit: mm(inch) 0.700(0.028) 7.620(0.300)TYP 1.524(0.060) TYP 6e 5e 6e 3.200(0.126) 3.600(0.142) 3.710(0.146) 4.310(0.170) 4e 4e 0.510(0.020)MIN 3.000(0.118) 3.600(0.142) 0.204(0.008) 0.360(0.014) 8.200(0.323) 9.400(0.370) 0.254(0.010)TYP 2.540(0.100) TYP 0.360(0.014) 0.560(0.022) 0.130(0.005)MIN 6.200(0.244) 6.600(0.260) R0.750(0.030) 3.000(0.118) Depth 0.100(0.004) 0.200(0.008) 9.000(0.354) 9.400(0.370) BCD Semiconductor Manufacturing Limited Apr. 2005 Rev. 2. 1 12 http://www.bcdsemi.com BCD Semiconductor Corporation 3170 De La Cruz Blvd, Suite # 105 Santa Clara, CA 95054-2411, U.S.A Tel: +1-408-988 6388, Fax: +1-408-988 6386 Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. 800 Yi Shan Road, Shanghai 200233, PRC Tel: +86-21-6485-1491, Fax: +86-21-5450-0008 Advanced Analog Circuits (Shanghai) Corporation 8F, B Zone, 900 Yi Shan Road, Shanghai 200233, PRC Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 BCD Semiconductor (Taiwan) Company Limited Room 2210, 22nd Fl, 333, Keelung Road, Sec. 1, TaiPei (110), Taiwan Tel: +886-2-2758 6828, Fax: +886-2-2758 6892 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.