MC34063ECD

MC34063AB, MC34063AC, MC34063EB, MC34063EC DC-DC converter control circuits Datasheet - production data Description The MC34063A/E series is a monolithic control circuit which delivers the main functions for DCDC voltage converting. DIP-8 The device contains an internal temperature compensated reference, comparator, duty cycle controlled oscillator with an active current limit circuit, driver and high current output switch. Output voltage is adjustable through two external resistors with a 2% reference accuracy. SO-8 Employing a minimum number of external components, the MC34063A/E device series is designed for step-down, step-up and voltageinverting applications. Features • Output switch current in excess of 1.5 A • 2 % reference accuracy • Low quiescent current: 2.5 mA (typ.) • Operating from 3 V to 40 V • Frequency operation to 100 kHz • Active current limiting Table 1. Device summary Order codes DIP-8 SO-8 MC34063ABN MC34063ABD-TR MC34063ACN MC34063ACD-TR MC34063EBN MC34063EBD-TR MC34063ECN MC34063ECD-TR February 2020 This is information on a product in full production. DocID5257 Rev 12 1/23 www.st.com 23 Contents MC34063AB, MC34063AC, MC34063EB, MC34063EC Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2/23 DocID5257 Rev 12 MC34063AB, MC34063AC, MC34063EB, MC34063EC 1 Diagram Diagram Figure 1. Block diagram DocID5257 Rev 12 3/23 Pin configuration 2 MC34063AB, MC34063AC, MC34063EB, MC34063EC Pin configuration Figure 2. Pin connections Table 2. Pin description 4/23 Pin n° Symbol Name and function 1 SWC Switch collector 2 SWE Switch emitter 3 TC 4 GND 5 CII Comparator inverting input 6 VCC Voltage supply 7 IPK IPK sense 8 DRC Timing capacitor Ground Voltage driver collector DocID5257 Rev 12 MC34063AB, MC34063AC, MC34063EB, MC34063EC 3 Maximum ratings Maximum ratings Table 3. Absolute maximum ratings Symbol VCC Power supply voltage VIR Comparator input voltage range Value Unit 50 V -0.3 to 40 V VSWC Switch collector voltage 40 V VSWE Switch emitter voltage (VSWC = 40V) 40 V VCE Switch collector to emitter voltage 40 V VDC Driver collector voltage 40 V IDC Driver collector current 100 mA ISW Switch current 1.5 A PTOT Power dissipation at TA = 25°C TJ Operating junction temperature TSTG TOP Note: Parameter for DIP-8 1.25 for SO-8 0.625 Storage temperature range Operating ambient temperature range for AC and EC series W 150 °C -40 to 150 °C 0 to 70 for AB series -40 to 85 for EB series -40 to 125 °C Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 4. Thermal data Symbol Parameter DIP-8 SO-8 Unit RthJA Thermal resistance junction-ambient (1) 100 160 °C/W RthJC Thermal resistance junction-case 42 20 °C/W 1. This value depends from thermal design of PCB on which the device is mounted. DocID5257 Rev 12 5/23 Electrical characteristics 4 MC34063AB, MC34063AC, MC34063EB, MC34063EC Electrical characteristics Refer to the test circuits, VCC = 5 V, TA = TLOW to THIGH, unless otherwise specified. (a) Table 5. Oscillator Symbol Parameter Test conditions Min. Typ. Max. Unit fOSC Frequency VPIN5 = 0V, CT = 1 nF, TA = 25°C 24 33 42 kHz ICHG Charge current VCC = 5 to 40V, TA = 25°C 24 33 42 µA Discharge current VCC = 5 to 40V, TA = 25°C 140 200 260 µA Discharge to charge current ratio PIN 7 = VCC, TA = 25°C 5.2 6.2 7.5 µA 250 300 350 mV Min. Typ. Max. Unit IDISCHG IDISCHG/ICHG VIPK(sense) Current limit sense voltage ICHG = IDISCHG, TA = 25°C Table 6. Output switch Symbol Parameter VCE(sat) Saturation voltage, Darlington connection ISW = 1 A, PIN 1, 8 connected 1 1.3 V VCE(sat) Saturation voltage ISW = 1 A, RPIN8 = 82 Ω to VCC Forced β ~ 20 0.45 0.7 V DC current gain ISW = 1 A,VCE = 5 V, TA = 25°C Collector off-state current VCE = 40 V 0.01 100 µA Min. Typ. Max. Unit TA = 25°C 1.225 1.25 1.275 TA = TLOW to THIGH 1.21 hFE IC(off) Test conditions 50 120 Table 7. Comparator Symbol VTH Regline IIB Parameter Threshold voltage Test conditions 1.29 V Threshold voltage line regulation VCC = 3 to 40 V 1 10 mV Input bias current VIN = 0 V -5 -400 nA a. TLOW = 0 °C, THIGH = 70 °C (AC and EC series); TLOW = -40 °C, THIGH = 85 °C (AB series); TLOW = -40 °C, THIGH = 125 °C (EB series) 6/23 DocID5257 Rev 12 MC34063AB, MC34063AC, MC34063EB, MC34063EC Electrical characteristics Table 8. Total device Symbol ICC VSTART-UP Parameter Test conditions Min. Typ. Max. for MC34063A 2.5 4 4 Supply current VCC = 5 to 40 V CT = 1 nF PIN 7 = VCC VPIN5 >VTH PIN 2 = GND Remaining pins open for MC34063E 1.5 Start-up voltage (1) for MC34063A TA = 25°C CT = 1 µF, PIN 5 = 0 for MC34063E 2.1 1.5 Unit mA V 1. Start-up voltage is the minimum power supply voltage at which the internal oscillator begins to work. Note: Maximum package power dissipation limit must be observed. If Darlington configuration is not used, care must be taken to avoid deep saturation of output switch. The resulting switch-off time may be adversely affected. In a Darlington configuration the following output driver condition is suggested: Forced β of output current switch = ICOUTPUT/(ICDRIVER - 1 mA) ≥ 10 DocID5257 Rev 12 7/23 Typical performance characteristics 5 MC34063AB, MC34063AC, MC34063EB, MC34063EC Typical performance characteristics Figure 3. Emitter follower configuration output saturation voltage vs. emitter current Figure 4. Output switch ON-OFF time vs. oscillator timing capacitor Figure 5. Common emitter configuration output switch saturation voltage vs. collector current Figure 6. Darlington configuration collector emitter saturation voltage (VCEsat) vs. temperature 8/23 DocID5257 Rev 12 MC34063AB, MC34063AC, MC34063EB, MC34063EC Typical performance characteristics Figure 7. Power collector emitter saturation voltage (VCEsat) vs. temperature Figure 8. Current limit sense voltage (VIPK) vs. temperature Figure 9. Reference voltage vs. temperature Figure 10. Bias current vs. temperature Figure 11. Supply current vs. temperature Figure 12. Supply current vs. input voltage DocID5257 Rev 12 9/23 Typical application circuit 6 MC34063AB, MC34063AC, MC34063EB, MC34063EC Typical application circuit Figure 13. Step-up converter Figure 14. Printed evaluation board PIN 1 = VOUT PIN 2 = GND PIN 3 = GND PIN 4 = VIN Table 9. Test condition (VOUT = 28 V) Test Conditions Value (Typ.) Unit Line Regulation VIN = 8 to 16 V, IO = 175 mA 30 mV Load Regulation VIN = 12 V, IO = 75 to 175 mA 10 mV Output Ripple VIN = 12 V, IO = 175 mA 300 mV Efficiency VIN = 12 V, IO = 175 mA 89 % 10/23 DocID5257 Rev 12 MC34063AB, MC34063AC, MC34063EB, MC34063EC Typical application circuit Figure 15. Step-down converter Figure 16. Printed evaluation board PIN 1 = VOUT PIN 2 = GND PIN 3 = GND PIN 4 = VIN Table 10. Test condition (VOUT = 5 V) Test Conditions Value (typ.) Unit Line regulation VIN = 15 to 25 V, IO = 500 mA 5 mV Load regulation VIN = 25 V, IO = 50 to 500 mA 30 mV Output ripple VIN = 25 V, IO = 500 mA 100 mV Efficiency VIN = 25 V, IO = 500 mA 80 % ISC VIN = 25 V, RLOAD = 0.1 Ω 1.2 A DocID5257 Rev 12 11/23 Typical application circuit MC34063AB, MC34063AC, MC34063EB, MC34063EC Figure 17. Voltage inverting converter Figure 18. Printed evaluation board PIN 1 = VOUT PIN 2 = GND PIN 3 = GND PIN 4 = VIN Table 11. Test condition (VOUT = 12 V) Test Conditions Value (typ.) Unit Line regulation VIN = 4.5 to 6 V, IO = 100 mA 15 mV Load regulation VIN = 5 V, IO = 10 to 100 mA 20 mV Output ripple VIN = 5 V, IO = 100 mA 230 mV Efficiency VIN = 5 V, IO = 100 mA 58 % ISC VIN = 5 V, RLOAD = 0.1 Ω 0.9 A 12/23 DocID5257 Rev 12 MC34063AB, MC34063AC, MC34063EB, MC34063EC Typical application circuit Table 12. Calculation Step-Up (Discontinuous mode) Step-Down (Continuous mode) Voltage Inverting (Discontinuous mode) V OUT + VF – V IN ( min ) ------------------------------------------------------V IN ( min ) – Vsat VOUT + V F ----------------------------------------------------------V IN ( min ) – V sat – V OUT VOUT + V F ------------------------------V IN – Vsat 1/fmin 1/fmin 1/fmin 4.5x10-5ton 4.5x10-5ton 4.5x10-5ton 2Iout(max)[(ton/toff)+1] 2Iout(max) 2Iout(max)[(ton/toff)+1] RSC 0.3/IPK(switch) 0.3/IPK(switch) 0.3/IPK(switch) CO Iout ton ------------------------------V ripple ( p – p ) IPK ( switch ) ( t on + toff ) -----------------------------------------------------8V ripple ( p – p ) Iout ton ------------------------------V ripple ( p – p ) V IN ( min ) – V sat -------------------------------------- × t on ( min ) I PK ( switch ) V IN ( min ) – V sat – V out -------------------------------------------------------- × t on ( min ) I PK ( switch ) V IN ( min ) – V sat -------------------------------------- × t on ( min ) I PK ( switch ) Parameter ton/toff (ton + toff) max CT IPK(switch) L(min) Note: 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 VOUT = Desired output voltage, |VOUT| = 1.25 (1 + R2/R1) IOUT = Desired output current fMIN = Minimum desired output switching frequency at the selected values of VIN and IO VRIPPLE = Desired peak to peak output ripple voltage. In practice, the calculated capacitor value will and to be increased due to its equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the line and load regulation. DocID5257 Rev 12 13/23 Typical application circuit MC34063AB, MC34063AC, MC34063EB, MC34063EC Figure 19. Step-up with external NPN switch Figure 20. Step-down with external NPN switch 14/23 DocID5257 Rev 12 MC34063AB, MC34063AC, MC34063EB, MC34063EC Typical application circuit Figure 21. Step-down with external PNP switch Figure 22. Voltage inverting with external NPN switch DocID5257 Rev 12 15/23 Typical application circuit MC34063AB, MC34063AC, MC34063EB, MC34063EC Figure 23. Voltage inverting with external PNP saturated switch Figure 24. Dual output voltage 16/23 DocID5257 Rev 12 MC34063AB, MC34063AC, MC34063EB, MC34063EC Typical application circuit Figure 25. Higher output power, higher input voltage DocID5257 Rev 12 17/23 Package mechanical data 7 MC34063AB, MC34063AC, MC34063EB, MC34063EC Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark. 18/23 DocID5257 Rev 12 MC34063AB, MC34063AC, MC34063EB, MC34063EC Package mechanical data Plastic DIP-8 mechanical data mm. inch. Dim. Min. A Typ. Max. Min. 3.3 Typ. Max. 0.130 a1 0.7 B 1.39 1.65 0.055 0.065 B1 0.91 1.04 0.036 0.041 b b1 0.028 0.5 0.38 0.020 0.5 D 0.015 0.020 9.8 0.386 E 8.8 0.346 e 2.54 0.100 e3 7.62 0.300 e4 7.62 0.300 F 7.1 0.280 I 4.8 0.189 L Z 3.3 0.44 0.130 1.6 0.017 0.063 P001F DocID5257 Rev 12 19/23 Package mechanical data MC34063AB, MC34063AC, MC34063EB, MC34063EC SO-8 mechanical data Dim. mm. Min. Typ. inch. Max. Min. Typ. Max. A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.04 0.010 A2 1.10 1.65 0.043 0.065 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 D 4.80 5.00 0.189 0.197 E 3.80 4.00 0.150 0.157 e 1.27 0.050 H 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k ddd 8° (max.) 0.1 0.04 0016023/C 20/23 DocID5257 Rev 12 MC34063AB, MC34063AC, MC34063EB, MC34063EC Package mechanical data Tape & reel SO-8 mechanical data mm. inch. Dim. Min. A Typ. Max. Min. 330 Max. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 Typ. 0.504 22.4 0.519 0.882 Ao 8.1 8.5 0.319 0.335 Bo 5.5 5.9 0.216 0.232 Ko 2.1 2.3 0.082 0.090 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 DocID5257 Rev 12 21/23 Revision history 8 MC34063AB, MC34063AC, MC34063EB, MC34063EC Revision history Table 13. Document revision history 22/23 Date Revision Changes 20-Nov-2007 10 Added Table 1. 24-Apr-2013 11 Removed note in Table 1. 11-Feb-2020 12 Corrected a typo on Regline parameter (from 5 mV Max. to 10 mV Max.) in Table 7: Comparator. DocID5257 Rev 12 MC34063AB, MC34063AC, MC34063EB, MC34063EC IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. For additional information about ST trademarks, please refer to www.st.com/trademarks. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2020 STMicroelectronics – All rights reserved DocID5257 Rev 12 23/23