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| Order this document by MC34063A/D MC34063A MC33063A DC-to-DC Converter Control Circuits The MC34063A 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 designed to be incorporated in Step-Down and Step-Up and Voltage-Inverting applications with a minimum number of external components. Refer to Application Notes AN920A/D and AN954/D for additional design information. * Operation from 3.0 V to 40 V Input DC-to-DC CONVERTER CONTROL CIRCUITS SEMICONDUCTOR TECHNICAL DATA * * * * * * Low Standby Current Current Limiting Output Switch Current to 1.5 A Output Voltage Adjustable Frequency Operation to 100 kHz Precision 2% Reference 8 1 P, P1 SUFFIX PLASTIC PACKAGE CASE 626 8 1 D SUFFIX PLASTIC PACKAGE CASE 751 (SO-8) PIN CONNECTIONS Representative Schematic Diagram 1 SQ 7 R 100 Ipk Oscillator CT 6 VCC Comparator + - Comparator 5 Inverting Input (Bottom View) 1.25 V Reference Regulator 4 Gnd MC33063AVD MC33063AVP MC34063AD This device contains 51 active transistors. MC34063AP1 TA = 0 to +70C TA = -40 to +125C SO-8 Plastic DIP SO-8 Plastic DIP Rev 5 Switch Collector Switch Emitter Timing Capacitor Gnd 1 2 3 4 8 7 6 5 Driver Collector Ipk Sense VCC Comparator Inverting Input Drive 8 Collector Q2 Q1 Switch Collector Ipk Sense 2 Switch Emitter (Top View) 3 ORDERING INFORMATION Timing Capacitor Device MC33063AD MC33063AP1 Operating Temperature Range TA = - 40 to +85C Package SO-8 Plastic DIP (c) Motorola, Inc. 1996 MOTOROLA ANALOG IC DEVICE DATA 1 MC34063A MC33063A MAXIMUM RATINGS Rating Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage (VPin 1 = 40 V) Switch Collector to Emitter Voltage Driver Collector Voltage Driver Collector Current (Note 1) Switch Current Power Dissipation and Thermal Characteristics Plastic Package, P, P1 Suffix TA = 25C Thermal Resistance SOIC Package, D Suffix TA = 25C Thermal Resistance Operating Junction Temperature Operating Ambient Temperature Range MC34063A MC33063AV MC33063A Storage Temperature Range Symbol VCC VIR VC(switch) VE(switch) VCE(switch) VC(driver) IC(driver) ISW Value 40 - 0.3 to + 40 40 40 40 40 100 1.5 Unit Vdc Vdc Vdc Vdc Vdc Vdc mA A PD RJA PD RJA TJ TA 1.25 100 625 160 +150 0 to +70 -40 to +125 - 40 to + 85 W C/W W C/W C C Tstg - 65 to +150 C NOTES: 1. Maximum package power dissipation limits must be observed. 2. ESD data available upon request. ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, TA = Tlow to Thigh [Note 3], unless otherwise specified.) Characteristics OSCILLATOR Frequency (VPin 5 = 0 V, CT = 1.0 nF, TA = 25C) Charge Current (VCC = 5.0 V to 40 V, TA = 25C) Discharge Current (VCC = 5.0 V to 40 V, TA = 25C) Discharge to Charge Current Ratio (Pin 7 to VCC, TA = 25C) Current Limit Sense Voltage (Ichg = Idischg, TA = 25C) OUTPUT SWITCH (Note 4) Saturation Voltage, Darlington Connection (Note 5) ( ISW = 1.0 A, Pins 1, 8 connected) Saturation Voltage, Darlington Connection (ISW = 1.0 A, RPin 8 = 82 to VCC, Forced VCE(sat) VCE(sat) hFE IC(off) - - 50 - 1.0 0.45 75 0.01 1.3 0.7 - 100 V V - A fosc Ichg Idischg Idischg/Ichg Vipk(sense) 24 24 140 5.2 250 33 35 220 6.5 300 42 42 260 7.5 350 kHz A A - mV Symbol Min Typ Max Unit ] 20) DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25C) Collector Off-State Current (VCE = 40 V) NOTES: 3. Tlow = 0C for MC34063A, - 40C for MC33063A, AV Thigh = +70C for MC34063A, + 85C for MC33063A, +125C for MC33063AV 4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 5. If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents ( 300 mA) and high driver currents ( 30 mA), it may take up to 2.0 s for it to come out of saturation. This condition will shorten the off time at frequencies 30 kHz, 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: IC output Forced b of output switch : 10 IC driver - 7.0 mA * *The 100 resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts. w 2 MOTOROLA ANALOG IC DEVICE DATA MC34063A MC33063A ELECTRICAL CHARACTERISTICS (continued) (VCC = 5.0 V, TA = Tlow to Thigh [Note 3], unless otherwise specified.) Characteristics COMPARATOR Threshold Voltage TA = 25C TA = Tlow to Thigh Threshold Voltage Line Regulation (VCC = 3.0 V to 40 V) MC33063A, MC34063A MC33363AV Input Bias Current (Vin = 0 V) TOTAL DEVICE Supply Current (VCC = 5.0 V to 40 V, CT = 1.0 nF, Pin 7 = VCC, VPin 5 > Vth, Pin 2 = Gnd, remaining pins open) ICC - - 4.0 mA Vth 1.225 1.21 Regline - - IIB - 1.4 1.4 - 20 5.0 6.0 - 400 nA 1.25 - 1.275 1.29 mV V Symbol Min Typ Max Unit NOTES: 3. Tlow = 0C for MC34063A, - 40C for MC33063A, AV Thigh = +70C for MC34063A, + 85C for MC33063A, +125C for MC33063AV 4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 5. If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents ( 300 mA) and high driver currents ( 30 mA), it may take up to 2.0 s for it to come out of saturation. This condition will shorten the off time at frequencies 30 kHz, 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: IC output Forced b of output switch : 10 IC driver - 7.0 mA * *The 100 resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts. w Figure 1. Output Switch On-Off Time versus Oscillator Timing Capacitor t on-off , OUTPUT SWITCH ON-OFF TIME ( s) 1000 500 200 100 50 20 10 5.0 2.0 1.0 0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0 CT, OSCILLATOR TIMING CAPACITOR (nF) 5.0 10 toff V OSC , OSCILLATOR VOLTAGE (V) VCC = 5.0 V Pin 7 = VCC Pin 5 = Gnd TA = 25C ton Figure 2. Timing Capacitor Waveform VCC = 5.0 V Pin 7 = VCC Pin 2 = Gnd Pins 1, 5, 8 = Open CT = 1.0 nF TA = 25C 10 s/DIV MOTOROLA ANALOG IC DEVICE DATA 3 200 mV/DIV MC34063A MC33063A Figure 3. Emitter Follower Configuration Output Saturation Voltage versus Emitter Current 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 0 0.2 0.4 0.6 0.8 1.0 1.2 IE, EMITTER CURRENT (A) 1.4 1.6 VCC = 5.0 V Pins 1, 7, 8 = VCC Pins 3, 5 = Gnd TA = 25C (See Note 4) VCE(sat), SATURATION VOLTAGE (V) VCE(sat), SATURATION VOLTAGE (V) 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 0.2 0.4 0.6 0.8 1.0 1.2 IC, COLLECTOR CURRENT(A) 1.4 1.6 VCC = 5.0 V Pin 7 = VCC Pins 2, 3, 5 = Gnd TA = 25C (See Note 4) Figure 4. Common Emitter Configuration Output Switch Saturation Voltage versus Collector Current Darlington Connection Forced = 20 V IPK(sense), CURRENT LIMIT SENSE VOLTAGE (V) Figure 5. Current Limit Sense Voltage versus Temperature 400 380 I CC , SUPPLY CURRENT (mA) 360 340 320 300 280 260 240 220 200 -55 -25 0 25 50 75 TA, AMBIENT TEMPERATURE (C) 100 125 VCC = 5.0 V Ichg = Idischg 3.6 3.2 2.8 2.4 2.0 1.6 1.2 0.8 0.4 0 0 Figure 6. Standby Supply Current versus Supply Voltage CT = 1.0 nF Pin 7 = VCC Pin 2 = Gnd 5.0 10 15 20 25 30 VCC, SUPPLY VOLTAGE (V) 35 40 NOTE: 4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 4 MOTOROLA ANALOG IC DEVICE DATA MC34063A MC33063A Figure 7. Step-Up Converter 170 H L 8 180 SQ R 7 Ipk Osc 6 + 100 VCC + - Comp. 5 R2 R1 2.2 k 47 k 330 + CO 1.25 V Ref Reg 4 1.0 H Vout 28 V/175 mA + 100 Vout Q2 Q1 2 1N5819 Rsc 0.22 Vin 12 V CT 3 CT 1500 pF 1 Optional Filter Test Line Regulation Load Regulation Output Ripple Efficiency Output Ripple With Optional Filter Conditions Vin = 8.0 V to 16 V, IO = 175 mA Vin = 12 V, IO = 75 mA to 175 mA Vin = 12 V, IO = 175 mA Vin = 12 V, IO = 175 mA Vin = 12 V, IO = 175 mA Results 30 mV = 0.05% 10 mV = 0.017% 400 mVpp 87.7% 40 mVpp Figure 8. External Current Boost Connections for IC Peak Greater than 1.5 A 8a. External NPN Switch 8b. External NPN Saturated Switch (See Note 5) 8 1 Vout R 8 1 Vout 7 2 Rsc 7 2 Rsc Vin 6 Vin 6 0 for R constant Vin NOTE: 5. If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents ( 300 mA) and high driver currents ( 30 mA), it may take up to 2.0 s to come out of saturation. This condition will shorten the off time at frequencies 30 kHz, 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. MOTOROLA ANALOG IC DEVICE DATA 5 MC34063A MC33063A Figure 9. Step-Down Converter 8 SQ R 7 Ipk Osc 6 100 + VCC + - 5 Comp. 1.25 V Ref Reg Q2 Q1 1 2 CT 1N5819 3 L CT 470 pF 4 1.0 H + CO Vout 100 220 H Rsc 0.33 Vin 25 V R2 3.6 k R1 1.2 k 470 + Vout 5.0 V/500 mA Optional Filter Test Line Regulation Load Regulation Output Ripple Short Circuit Current Efficiency Output Ripple With Optional Filter Conditions Vin = 15 V to 25 V, IO = 500 mA Vin = 25 V, IO = 50 mA to 500 mA Vin = 25 V, IO = 500 mA Vin = 25 V, RL = 0.1 Vin = 25 V, IO = 500 mA Vin = 25 V, IO = 500 mA Results 12 mV = 0.12% 3.0 mV = 0.03% 120 mVpp 1.1 A 83.7% 40 mVpp Figure 10. External Current Boost Connections for IC Peak Greater than 1.5 A 10a. External NPN Switch 10b. External PNP Saturated Switch 8 1 8 1 Vout 7 Rsc Vin 6 2 Vout Rsc Vin 7 2 6 6 MOTOROLA ANALOG IC DEVICE DATA MC34063A MC33063A Figure 11. Voltage Inverting Converter 8 SQ R 7 Ipk Osc 6 + 100 + - 5 R1 953 R2 8.2 k Comp. 1.25 V Ref Reg VCC Q2 Q1 1 2 L 3 + 1500 pF 1N5819 88 H Rsc 0.24 Vin 4.5 V to 6.0 V CT 4 1.0 H Vout -12 V/100 mA 1000 f + CO + 100 Vout Optional Filter Test Line Regulation Load Regulation Output Ripple Short Circuit Current Efficiency Output Ripple With Optional Filter Conditions Vin = 4.5 V to 6.0 V, IO = 100 mA Vin = 5.0 V, IO = 10 mA to 100 mA Vin = 5.0 V, IO = 100 mA Vin = 5.0 V, RL = 0.1 Vin = 5.0 V, IO = 100 mA Vin = 5.0 V, IO = 100 mA Results 3.0 mV = 0.012% 0.022 V = 0.09% 500 mVpp 910 mA 62.2% 70 mVpp Figure 12. External Current Boost Connections for IC Peak Greater than 1.5 A 12a. External NPN Switch 12b. External PNP Saturated Switch 8 1 8 1 Vout 7 2 Vout 7 2 Vin 6 Vin 6 MOTOROLA ANALOG IC DEVICE DATA 7 MC34063A MC33063A Figure 13. Printed Circuit Board and Component Layout (Circuits of Figures 7, 9, 11) 5.45 2.500 (Top view, copper foil as seen through the board from the component side) MC34063A MC34063A MC34063A (Top View, Component Side) *Optional Filter. INDUCTOR DATA Converter Step-Up Step-Down Voltage-Inverting Inductance (H) 170 220 88 Turns/Wire 38 Turns of #22 AWG 48 Turns of #22 AWG 28 Turns of #22 AWG All inductors are wound on Magnetics Inc. 55117 toroidal core. 8 MOTOROLA ANALOG IC DEVICE DATA MC34063A MC33063A Figure 14. Design Formula Table Calculation ton/toff V out ) VF * Vin(min) V * Vsat in(min) t on ton t off Step-Up V ) VF * Vsat * Vout in(min) V out t on ton t off Step-Down Voltage-Inverting |V out| V ) VF * Vsat in ) toff )1 1 f (ton + toff) toff ) toff )1 1 f ) toff )1 1 f t on ton t off ton CT Ipk(switch) 2I Rsc L(min) (V (ton + toff) - toff 4.0 x 10-5 ton out(max) t on t off (ton + toff) - toff 4.0 x 10-5 ton 2I out(max) 2I (ton + toff) - toff 4.0 x 10-5 ton out(max) t on t off )1 (V t on(max) )1 t 0.3/Ipk(switch) V sat) in(min) I pk(switch) 9 I outt on V ripple(pp) * V sat in(min) I pk(switch) I * 0.3/Ipk(switch) * Vout) ) 0.3/Ipk(switch) (V t on(max) V sat) in(min) I pk(switch) 9 I outt on V ripple(pp) * on(max) CO (t t) pk(switch) on off 8V ripple(pp) Vsat = Saturation voltage of the output switch. VF = Forward voltage drop of the output rectifier. The following power supply characteristics must be chosen: Vin - Nominal input voltage. R2 1.25 1 Vout - Desired output voltage, |V out| R1 Iout - Desired output current. fmin - Minimum desired output switching frequency at the selected values of Vin and IO. Vripple(pp) - Desired peak-to-peak output ripple voltage. In practice, the calculated capacitor value will need to be increased due to its equivalent series Vripple(pp) - resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the line and load regulation. NOTE: For further information refer to Application Note AN920A/D and AN954/D. + ) MOTOROLA ANALOG IC DEVICE DATA 9 MC34063A MC33063A OUTLINE DIMENSIONS P, P1 SUFFIX PLASTIC PACKAGE CASE 626-05 ISSUE K 8 5 -B- 1 4 F NOTE 2 -A- L NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS). 3. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. DIM A B C D F G H J K L M N MILLIMETERS MIN MAX 9.40 10.16 6.60 6.10 4.45 3.94 0.51 0.38 1.78 1.02 2.54 BSC 1.27 0.76 0.30 0.20 3.43 2.92 7.62 BSC -- 10 1.01 0.76 INCHES MIN MAX 0.370 0.400 0.240 0.260 0.155 0.175 0.015 0.020 0.040 0.070 0.100 BSC 0.030 0.050 0.008 0.012 0.115 0.135 0.300 BSC -- 10 0.030 0.040 C -T- SEATING PLANE J N D H G 0.13 (0.005) M K T A M M B M D SUFFIX PLASTIC PACKAGE CASE 751-05 (SO-8) ISSUE P -A- 8 5 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D F G J K M P R MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.18 0.25 0.10 0.25 0_ 7_ 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.189 0.196 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.007 0.009 0.004 0.009 0_ 7_ 0.229 0.244 0.010 0.019 -B- 1 4 4X P 0.25 (0.010) M B M C -T- 8X SEATING PLANE R X 45 _ F D 0.25 (0.010) M K TB M_ S J S A 10 MOTOROLA ANALOG IC DEVICE DATA MC34063A MC33063A NOTES MOTOROLA ANALOG IC DEVICE DATA 11 MC34063A MC33063A Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. 1-800-441-2447 or 602-303-5454 MFAX: RMFAX0@email.sps.mot.com - TOUCHTONE 602-244-6609 INTERNET: http://Design-NET.com JAPAN: Nippon Motorola Ltd.; Tatsumi-SPD-JLDC, 6F Seibu-Butsuryu-Center, 3-14-2 Tatsumi Koto-Ku, Tokyo 135, Japan. 03-81-3521-8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852-26629298 12 *MC34063A/D* MOTOROLA ANALOG IC DEVICE DATA MC34063A/D |
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