0.8A Step Down / Step Up / Inverting DC-DC Converter MC34063C FEATURES 8 SOP/ 8 DIP PIN Configulation ● OPERATING FROM 3V TO 40V ● Low Standby Current ● Current Limitting ● Output Switch Current to 0.8A ● Output Valtage Adjustable ● Operation Frequency up to 180KHz (CT=100pF) SOP-8 PKG ● Precision 2% Reference Switch Collector 1 8 Drive Collector 2 7 Ipk Sense Timing 3 Capacitor 4 Ground 6 Vcc 5 Comparator - Input Switch Emitter Application DIP-8 PKG ● Battery Chargers ● NICs / Switches / Hubs ● ADSL Modems ● Negative Voltage Power Supplies ORDERING INFORMATION Device MC34063CD MC34063CN Package 8 SOP 8 DIP DESCRIPTION The MC34063C is a monolithic switching regulator control circuit containing the primary funtion required for DC-DC converters. This device consists of internal temperature compenssated reference, voltage comparator, cotr duty cycle oscillator with active current. The device is specifically designed to be used in StepStep-Up and Voltage-Inverting applications with a minimum number of external components. The MC34063C is the enhanced version of MC34063A with the ability to work in higher frequen The 34063C is available in 2 pcakages : SOP-8 and DIP-8. HTC Jan. 2007-Rev 1.0 1 0.8A Step Down / Step Up / Inverting DC-DC Converter MC34063C BLOCK DIAGRAM Drive Collector 8 s Q Q2 1 Switch Collector 2 Switch Emitter 3 Timing Capacitor 4 GND Q1 R 7 Ipk Sense Ipk Oscillator Vcc 6 Comparator 1.25V Reference Regulator + Comparator lnverting input 5 ABSOLUTE MAXIMUM RATINGS (NOTE 1) SYMBOL PARAMETER Vcc Power Supply Voltage Vir Comparator input Voltage Range VALUE UNIT 40 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 (NOTE 2) 100 ㎃ Isw Switch Current 0.8 A Power Dissipation at Tamb=25℃ 1.25 W Thermal Resistance 100 ℃/W 0.625 W 160 ℃/W -40 to 150 ℃ -65 to +150 ℃ PD PΘJA PD PΘJA TJ Tstg SOP Package DIP Package Power Dissipation at Tamb=25℃ Thermal Resistance Operating Juntion Temperature Range Storage Temperature Range Absolute Maximum Rating are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. HTC Jan. 2007-Rev 1.0 2 MC34063C 0.8A Step Down / Step Up / Inverting DC-DC Converter ELECTRICAL CHARACTERISTICS( Refer to the test circuits, VCC=5V, Ta= -40℃ to 85℃ OSCILLATOR SYMBOL FOSC Ichg Idischg Idischg/Ichg Vipk(sense) PARAMETER Frequency Charge Current Discharge Current Discharge to Charge Current Ratio Current Limit Sense Voltage TEST CONDITIONS Vpin5= 0 V ,CT= 100pF ,Ta= 25o VCC= 5 to 40V ,Ta= 25oC o VCC= 5 to 40V ,Ta= 25 C o Pin 7= VCC ,Ta= 25 C o Ichg= Idischg ,Ta= 25 C MIN. 170 30 180 5.2 250 TYP. 180 38 240 6.5 300 MAX. UNIT 190 KHz 45 ㎂ 290 ㎂ 7.5 350 ㎷ MIN. TYP. 1 MAX. UNIT 1.3 V OUTPUT SWITCH (NOTE 3) SYMBOL VCE(sat) PARAMETER Saturation Voltage, Darlington connection VCE(sat) Saturation Voltage (NOTE 4) hFE IC(off) DC Current Gain Collector Off-State Current TEST CONDITIONS ISW= 1A ,Pins 1,8 connected ISW= 1A ,Rpin8= 82Ω to VCC, Forced β ~ 20 o ISW= 1A, VCE= 5V, Ta= 25 C VCE= 40V 50 0.45 0.8 V 75 0.01 100 ㎂ COMPARATOR SYMBOL Vth Regline IIB PARAMETER Threshold Voltage Threshold Voltage Line Regulation Input Bias Current TEST CONDITIONS Ta= 25oC Ta= TLOW to THIGH VCC= 3 to 40V VIN= 0V MIN. 1.225 1.21 1.4 -20 MAX. UNIT 1.275 V V 1.29 ㎷ 5 -400 ㎁ TYP. MAX. UNIT TYP. 1.25 TOTAL DEVICE SYMBOL ICC PARAMETER Supply Current TEST CONDITIONS MIN. VCC= 5 to 40V, CT=1㎋ Pin7= VCC ,Vpin5>Vth, Pin2=GND Remaining pins open for MC34063C 2.5 4 ㎃ Notes: 1 Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the devic These are stress retings only, and functional operation of the device at these or any other conditions beyond thos indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" f extended periods may affect device reliability. 2 Maximum package power dissipation limits must be observed. 3 Low duty cycle pulse technique are used during test to maintain juntion temperature as close to ambient Temperature as possible. 4 If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents (≤300mA) and high driver currents ( ≥30mA), it may take up to 2.0 ㎲ 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. HTC Jan. 2007-Rev 1.0 3 0.8A Step Down / Step Up / Inverting DC-DC Converter MC34063C TYPICAL PERFORMANCE CHARACTERISTICS HTC Jan. 2007-Rev 1.0 4 MC34063C 0.8A Step Down / Step Up / Inverting DC-DC Converter TYPICAL APPLICATION CIRCUIT Step-Up Converter L1 120μH R3 1 8 180Ω DRC SWC Ipk SWE 7 Rsc 2 6 Vcc TC CII GND D1 IN5819 3 0.4Ω 5 VIN 12V + C2 100㎌ 4 C3 VOUT 1500pF 28V/175㎃ MC34063C R1 R2 2.2KΩ + C1 47KΩ 330㎌ Step-Down Converter 1 8 DRC SWC 7 Rsc Ipk 0.4Ω SWE 6 Vcc TC CII GND 5 VIN 25V + C2 100㎌ IN5819 2 D1 3 L 4 C3 220μH 470㎊ MC34063C R1 R2 1.2KΩ 3.6KΩ + C1 VOUT 5V/0.5A 470㎌ HTC Jan. 2007-Rev 1.0 5 MC34063C 0.8A Step Down / Step Up / Inverting DC-DC Converter Step-Up With External NPN Switch 8 VOUT 1 S Q2 Q + Q1 R 2 7 Rsc VIN 3 Ipk Oscillator 6 comparator 1.25V + 4 Reference - Regulator 5 Voltage Inverting Converter 1 8 DRC SWC 7 R3 L1 2 Ipk SWE 0.4Ω 150μH 6 3 Vcc TC 5 VIN 4.5V to 6V + C2 100㎌ D1 4 CII GND BYV10-40 C3 1.5㎋ MC34063C R2 R1 VOUT 8.2KΩ 953Ω C1 + -12V /100㎃ 1000㎌ HTC Jan. 2007-Rev 1.0 6 MC34063C 0.8A Step Down / Step Up / Inverting DC-DC Converter Step-Down With External NPN Switch 8 1 S Q Q2 Q1 R 2 7 Rsc VOUT 3 Ipk Oscillator + 6 VIN comparator 1.25V + - 4 Reference Regulator 5 Step-Down With External PNP Switch 8 1 S Q Q2 Q1 R + VOUT 2 7 Rsc VIN 3 Ipk Oscillator 6 comparator + - 1.25V 4 Reference Regulator 5 HTC Jan. 2007-Rev 1.0 7 MC34063C 0.8A Step Down / Step Up / Inverting DC-DC Converter Voltage Inverting With External NPN Switch 8 1 S Q Q2 Q1 R 2 7 Rsc Ipk Oscillator 6 VIN VOUT 3 + comparator 1.25V + - 4 Reference Regulator 5 Voltage Inverting With External PNP Saturated Switch 8 1 S Q2 Q VOUT Q1 R + 2 7 Ipk Oscillator Rsc VIN 6 3 comparator + - 1.25V Reference 4 Regulator 5 HTC Jan. 2007-Rev 1.0 8 MC34063C 0.8A Step Down / Step Up / Inverting DC-DC Converter Dual Output Voltage + +12V GND 8 + 1 S Q Q2 -12V Q1 R 2 7 Rsc Ipk Oscillator comparator 6 VIN 3 1.25V + - 4 Reference Regulator 5 Higher Output Power, Higher Input Voltage + Isolated from input +VOUT -VOUT 8 + 1 S Q R 2 7 VIN Rsc Ipk Oscillator 6 3 comparator 1.25V + - Reference 4 Regulator 5 HTC Jan. 2007-Rev 1.0 9