MC34063A DC/DC CONVERTER CONTROL CIRCUIT SPEC NO: DS34063A-00 ! FEATURES " " " " " " ! DESCRIPTION 3V to 30V Input Voltage Operation. Internal 1.6A Peak Current Switch. The " by Analog Integrations Corporation, an improved second source over the Internal ±1.8% Reference. Low Quiescent Current at 1.6mA. Frequency Operation from 100Hz to 100KHz. Current Limiting. industrial standard MC34063A, is a monolithic control circuit containing the primary functions required for DC/DC converters. The device consists of an internal temperature compensated reference, ! APPLICATIONS " MC34063A comparator, controlled duty cycle oscillator with an active current limit circuit, driver Saver for Cellular phones DC-DC Converter Module and high current output switch. This device is specifically designed to be incorporated in stepdown, step-up and voltage-inverting applications with a minimum number of external components. The ±1.8% internal reference and low quiescent current of 1.6mA are among the improvements of the device over the competition. ! TYPICAL APPLICATION CIRCUIT VOUT 200µH D1 1N5819 *RS VIN 6 5 + C1 7 DRI SC IPK SE VCC TC CO 1 2 FB GND 8.6V SAVER *:Io=0.3/RS 3 4 CT 100µF 470pF 8 + 220µF L MC34063A RB RA 5.6K 33K Saver Circuit for Cellular Phone ! ORDERING INFORMATION MC34063A XX ORDER NUMBER PACKAGE TYPE N: PLASTIC DIP S: SMALL OUTLINE TEMPERATURE C: 0°C~+70°C MC34063ACN (PLASTIC DIP) PIN CONFIGURATION TOP VIEW MC34063ACS (PLASTIC SO) SC 1 SE 2 TC 3 GND 4 ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510 8 DRI 7 IPK 6 VCC 5 FB 1 MC34063A DC/DC CONVERTER CONTROL CIRCUIT SPEC NO: DS34063A-00 ! ABSOLUTE MAXIMUM RATINGS Supply Voltage ......................................................…………..................................... 30V Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage ..................................………….................... -0.3V~30V .......................................……………......................................30V ..................................…………….............................................30V Switch Collector to Emitter Voltage Driver Collector Voltage Switch Current .....................…………..........................................30V .................................……………............................................30V ............................................……………..............................................1.6A Power Dissipation and Thermal Characteristics DIP Package Ta= 25°C ...............................………….............................1.0W Thermal Resistance .................……….......................100°C /W SO Package Ta= 25°C.................................…………….......................625mW Thermal Resistance .................……….......................160°C /W Operating Junction Temperature ................................…………..….............................125°C Operating Ambient Temperature Range .................……...…...............................0°C~70°C Storage Temperature Range .....................……………....…........................... - 65°C~150°C ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510 2 MC34063A DC/DC CONVERTER CONTROL CIRCUIT SPEC NO: DS34063A-00 ! ELECTRICAL CHARACTERISTICS (VCC= 5V, Ta=25°°C, unless otherwise specified.) PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT Oscillator Charging Current 5.0V≤VCC≤30V ICHG 10 25 40 µA Discharge Current 5.0V≤VCC≤30V IDISCHG 100 150 200 µA Voltage Swing PIN 3 Discharge to Charge Current Ratio VIPK(SENSE) =VCC Current Limit Sense Voltage ICHG=IDISCHG VOSC 0.6 IDISCHG/ ICHG 6.0 VIPK(SENSE) 250 V 300 350 mV Output Switch Saturation Voltage, Darlington Connection ISW =1.0A; VC(DRIVER)=VC(SWITCH) VCE(SAT) 1.0 1.3 V Saturation Voltage ISW =1.0A; IC(DRIVER)=50mA (Forced β≅20) VCE (SAT) 0.4 0.7 V DC Current Gain ISW =1.0A; VCE=5.0V Collector Off-State Current VCE=30V hFE 35 IC(OFF) 120 10 nA Comparator Threshold Voltage 0°C≤Ta≤70°C VFB Threshold Voltage 1.227 1.25 1.273 V 1.29 V 1.21 Threshold Voltage Line Regulation 3.0V≤VCC≤30V REGLINE 0.1 0.3 mV/V Input Bias Current VIN=0V IIB 0.4 1 µA Supply current VIPK(SENSE)=VCC VPIN 5>VFB 5.0V≤VCC≤30V CT=0.001µF, PIN 2=GND Remaining pins open ICC 1.6 3 mA ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510 3 MC34063A DC/DC CONVERTER CONTROL CIRCUIT SPEC NO: DS34063A-00 ! TYPICAL PERFORMANCE CHARACTERISTICS 1000 Standby Supply Current vs. Supply Voltage 2 ICC, Supply Current (mA) VCC=5V VIPK=VCC PIN5=GND 100 ON TIME 10 OFF TIME 1.6 CT=1nF VIPK=VCC PIN 2=GND 1.2 0.8 0.4 1 tON-OFF Output Switch ON-OFF Time (µS) Output Switch ON-OFF Time vs. Oscillator Timing Capacitor 1 0.1 10 0 100 0 5 10 25 20 30 IPK Threshold Voltage vs Temperature VFB, Threshold Voltage vs Temperature 350 1.3 VCC = 5V, CT = 1nF PIN 2 = GND 1.28 VCC = 5V CT = 1nF PIN 5 = GND 340 VIPK, Threshold Voltage (mV) VFB, Threshold Voltage (V) 15 VCC, Supply Voltage (V) CT, Oscillator Timing Capacitor (nF) 1.26 1.24 1.22 330 320 310 300 290 280 270 260 1.2 250 0 10 20 30 40 50 Temperature (°C) 60 70 80 0 VCE(SAT), Saturation Voltage (V) VCE(SATE) Saturation Voltage (V) 1.4 1.6 1.5 1.4 1.3 30 40 50 60 70 80 Common-Emitter Configuration Output Switch Saturation Voltage vs Collector Current 1.8 1.7 20 Temperature (°C) Emmiter-Follower Configuration Output Switch Saturation Voltage vs Emmiter Current VCC = 5V PIN 1, 7, 8 = VCC PIN 3, 5 = GND 10 VCC 5V VCC == 5.0V PIN = VCC PIN 77 =VCC PINS2,2,3,3,55== GND GND PIN Forced Beta = 20 1.2 1.0 Darlington Connection 0.8 0.6 0.4 Forced Beta = 20 0.2 0 1.2 0 0.5 1 1.5 0 0.5 1 1.5 IC, Collector Current (A) IE, Emitter Current (A) ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510 4 MC34063A DC/DC CONVERTER CONTROL CIRCUIT SPEC NO: DS34063A-00 ! BLOCK DIAGRAM 1 SC 8 Q2 DRI QS Q1 R 80 2 SE 7 IPK IS CT Oscillator TC 6 3 VCC Comparator 1.25V Reference Voltage GND + - 5 4 FB ! PIN DESCRIPTIONS PIN 1: SC - 1.6A switch collector PIN 5: FB PIN 2: SE - Darlington switch emitter PIN 6: VCC - Power supply input PIN 3: TC - Oscillator timing capacitor PIN 7: IPK - Highside current sense input, VCC - VIPK=300mV PIN 8: DRI - Drive collector PIN 4: GND - Power GND - Feedback comparator inverting input ! APPLICATION INFORMATION • DESIGN FORMULA TABLE CALCULATION STEP-DOWN STEP-UP VOLTAGE-INVERTING VOUT + VF VIN(MIN) - VSAT - VOUT 1 FMIN VOUT + VF - VIN(MIN) VIN(MIN) - VSAT 1 FMIN VOUT + VF VIN - VSAT 1 FMIN CT 4x10-5tON 4 x 10-5tON 4 x 10-5tON IC (SWITCH) 2IOUT(MAX) t ON t OFF (tON + tOFF) MAX RS L(MIN) Co 2IOUT(MAX) ( 0.33/IC(SWITCH) VIN(MIN) - VSAT - VOUT tON(MAX) IC(SWITCH) IC ( SWITCH) (t ON + t OFF) 8V RIPPLE ( P - P ) t ON + t OFF ) t OFF 2IOUT(MAX) ( 0.33/ IC (SWITCH) VIN(MIN) - VSAT tON(MAX) IC(SWITCH) IOUT tON VRIPPLE(P - P) t ON + t OFF ) t OFF 0.33/ IC (SWITCH) VIN(MIN) - VSAT tON(MAX) IC(SWITCH) IOUT tON VRIPPLE(P - P) ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510 5 MC34063A DC/DC CONVERTER CONTROL CIRCUIT SPEC NO: DS34063A-P2 VSAT VF = Saturation voltage of the output switch. = Forward voltage drop of the ringback rectifier 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. The following power supply characteristics must be chosen: VIN - Nominal input voltage. VOUT - Desired output voltage, V OUT =1.25 (1 + RB/RA) IOUT - Minimum desired output switching frequency FMIN - Desired output current. ! APPLICATION EXAMPLES VOUT 200µH L 5V/500mA + 8 RS 0.25 7 VIN C1 6 5 + DRI CS 1 IPK SE VCC TC D1 1N5821 CO 470µF 2 3 4 FB RB 470pF CT GND 100µF 3.6K RA 1.2K MC34063A Line Regulation VIN = 10V ~20V @ IO=500mA 40mV Load Regulation VIN = 15V, @ IO=10mA ~ 500mA 5mV Short Circuit Current VIN =15V, @ RL = 0.1Ω 1.3A Fig. 1 Step-Down Converter R1 CS 1 8 DRI 7 RS VIN 6 5 + C1 IPK SE VCC TC GND FB R2 Q1 2 3 L 4 CT D1 + VOUT Co MC34063A RS RB Fig. 2 Step-Down Converter with External PNP Saturation Switch ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510 6 MC34063A DC/DC CONVERTER CONTROL CIRCUIT SPEC NO: DS34063A-P2 ! APPLICATION EXAMPLES (CONTINUED) D1 200µH L RS 0.22 VIN + 100µF C1 2V/200mA 1N5819 R1 150 8 VOUT DRI CS 7 IPK SE 6 VCC TC 5 FB GND + CO 220µF 1 2 3 4 680pF CT MC34063A RA RB 2.2K 47K Line Regulation VIN = 8V ~16V @ IO=200mA Load Regulation VIN = 12V, @ IO=80mA ~ 200mA 100mV 5mV Fig. 3 Step-Up Converter D1 L VOUT R1 8 7 RS VIN 6 + 5 C1 RA DRI CS 1 IPK SE TC VCC FB GND + CO 2 Q 3 R2 4 CT MC34063A RB Fig. 4 Step-Up Converter with External NPN Switch ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510 7 MC34063A DC/DC CONVERTER CONTROL CIRCUIT SPEC NO: DS34063A-P2 ! APPLICATION EXAMPLES (CONTINUED) 1 2 L 100µH 3 4 CT 680pF D1 1N5819 VOUT 8 DRI CS IPK SE VCC TC 6 7 RS 0.25 S + GND 5 FB C1 100µF VIN 4.5V~6V MC34063A -12V/100mA + RA 953 CO 470µF RB 8.2K Line Regulation VIN = 4.5V ~6V @ IO=100mA 20mV Load Regulation VIN = 5V, @ IO=10mA ~ 100mA 100mV Fig.5 Inverting Converter R2 RS VIN + 8 DRI CS 1 7 IPK SE 2 6 VCC TC 3 GND 4 5 FB C1 R1 Q1 L D1 CT MC34063A RA RB VOUT CO + Fig 6. Voltage Inverting Converter With PNP Saturated Switch ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510 8 MC34063A DC/DC CONVERTER CONTROL CIRCUIT SPEC NO: DS34063A-P2 ! PHYSICAL DIMENSIONS " 8 LEAD PLASTIC SO (unit: mm) D SYMBOL MIN MAX A 1.35 1.75 A1 0.10 0.25 B 0.33 0.51 C 0.19 0.25 D 4.80 5.00 E 3.80 4.00 H E e e A A1 C B " L 1.27(TYP) H 5.80 6.20 L 0.40 1.27 8 LEAD PLASTIC DIP (unit: mm) D E1 E A2 A1 MIN MAX A1 0.381 — A2 2.92 4.96 b 0.35 0.56 C 0.20 0.36 D 9.01 10.16 E 7.62 8.26 E1 6.09 7.12 C L e eB b SYMBOL e 2.54 (TYP) eB — 10.92 L 2.92 3.81 ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510 9