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 DIP-8 PKG ● Moisture Sensitivity Level 3 Application Switch Collector 1 8 Driver Collector Switch Emitter 2 7 Ipk Sense Timing Capacitor 3 6 Vcc Ground 4 5 Comparator Inverting Input ● Battery Chargers ● NICs / Switches / Hubs ● ADSL Modems ● Negative Voltage Power Supplies ORDERING INFORMATION Device MC34063CD MC34063CN Package SOP-8 DIP-8 DESCRIPTION The MC34063C is a monolithic switching regulator control circuit containing the primary funtions required for DC-DC converters. This device consists of internal temperature compenssated reference, voltage comparator, cotrolled duty cycle duty cycle oscillator with active current. The device is specifically designed to be used in Step-Down, Step-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 frequency. The 34063C is available in 2 pcakages : SOP-8 and DIP-8. HTC 2008 - Ver. 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 Ipk Sense 7 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 −2− 0.8A Step Down / Step Up / Inverting DC-DC Converter MC34063C ELECTRICAL CHARACTERISTICS(Refer to the test circuits, V CC=5V, Ta= -40℃ to 85℃) OSCILLATOR SYMBOL PARAMETER FOSC Frequency Ichg Charge Current Idischg Discharge Current Idischg/Ichg Discharge to Charge Current Ratio Vipk(sense) Current Limit Sense Voltage TEST CONDITIONS MIN. Vpin5= 0 V ,CT= 100pF ,Ta= 25 C 170 30 VCC= 5 to 40V ,T a= 25oC o TYP. 180 MAX. UNIT 190 KHz 38 45 ㎂ 180 240 290 ㎂ Pin 7= V CC ,Ta= 25 C 5.2 6.5 7.5 Ichg= Idischg ,Ta= 25oC 250 300 350 MIN. TYP. 1 o VCC= 5 to 40V ,T a= 25 C o ㎷ OUTPUT SWITCH (NOTE 3) SYMBOL VCE(sat) VCE(sat) PARAMETER Saturation Voltage, Darlington connection Saturation Voltage (NOTE 4) hFE DC Current Gain IC(off) Collector Off-State Current TEST CONDITIONS ISW = 1A ,Pins 1,8 connected 0.45 ISW = 1A ,Rpin8= 82Ω to VCC, Forced β ~ 20 ISW = 1A, VCE= 5V, T a= 25oC VCE= 40V 50 MAX. UNIT 1.3 V 0.8 V 100 ㎂ 75 0.01 COMPARATOR SYMBOL Vth Regline IIB PARAMETER TEST CONDITIONS Threshold Voltage Ta= 25oC Ta= TLOW to THIGH Threshold Voltage Line Regulation VCC= 3 to 40V Input Bias Current VIN= 0V MIN. 1.225 1.21 TYP. 1.25 MAX. UNIT 1.275 V 1.29 V 1.4 5 ㎷ -20 -400 ㎁ TOTAL DEVICE SYMBOL ICC PARAMETER Supply Current TEST CONDITIONS VCC= 5 to 40V, CT=1㎋ MIN. TYP. Pin7= VCC ,Vpin5>Vth, Pin2=GND Remaining pins open for MC34063C 2.5 MAX. UNIT 4 ㎃ Notes: 1 Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress retings 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. 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. ( and 4 If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents≤300mA) 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 −3− 0.8A Step Down / Step Up / Inverting DC-DC Converter MC34063C TYPICAL PERFORMANCE CHARACTERISTICS А A B TON/OFF — Output Switch ON/OFF Time (µs) OUTPUT SWITCH ON-OFF TIME versus OSCILLATOR TIMING CAPACITOR TIMING CAPACITOR WAVEFORM 1000 VOSC — Oscillator Voltage (V) 200mV / DIV tON 100 tOFF 10 VCC = 5V Pin7= VCC Pin5 = GND TA = 25°C 1 1 0.1 VCC = 5V Pin7= VCC 10 Pin2 = GND TA = 25°C Pins1, 5, 8 = open CT = 1nF 100 CT — Oscillator Timing Capacitor (nF) C Time — 10µs / DIV D OSCILLATOR FREQUENCY versus TIMING CAPACITOR STANDBY SUPPLY CURRENT versus SUPPLY VOLTAGE 3.5 3.0 I CC — Supply Current (mA) Frequency (kHz) 100 10 VCC = 5V Pin7= VCC Pin5 = GND TA = 25°C 1 0.1 1 2.5 2.0 1.5 CT = 1nF Pin7= VCC Pin2 = GND 1.0 10 0.5 100 0 5 10 CT — Oscillator Timing Capacitor (nF) E 15 20 25 30 35 40 VCC — Supply Voltage (V) F EMITTER FOLLOWER CONFIGURATION OUTPUT SATURATION VOLTAGE vs. EMITTER CURRENT COMMON EMITTER CONFIGURATION OUTPUT SWITCH SATURATION VOLTAGE vs. COLLECTOR CURRENT 1.2 1.65 1.1 1.0 Saturation Voltage (V) Saturation Voltage (V) 1.60 1.55 1.50 1.45 VCC = 5V Pins 1, 7, 8 = VCC Pins 3, 5 = GND TA = 25°C 1.40 1.35 0 0.1 0.2 0.3 0.4 0.5 0.7 0.6 0.8 0.9 1.0 0.8 0.7 0.6 0.5 0.4 0.3 Forced ? = 20 0.2 VCC = 5V Pins 7= VCC Pins 2, 3, 5 = GND TA = 25°C 0.1 0 1.1 -0.1 Emitter Current (A) G Darlington Connection 0.9 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Collector Current (A) CURRENT LIMIT SENSE VOLTAGE versus TEMPERATURE Current Limit Sense Voltage (mV) 300 295 290 285 280 275 270 265 260 255 250 -60 -40 -20 0 20 40 60 80 100 120 140 3 Temperature (°C) HTC −4− 0.8A Step Down / Step Up / Inverting DC-DC Converter MC34063C 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 −5− 0.8A Step Down / Step Up / Inverting DC-DC Converter MC34063C 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 −6− 0.8A Step Down / Step Up / Inverting DC-DC Converter MC34063C 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 −7− 0.8A Step Down / Step Up / Inverting DC-DC Converter MC34063C 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 −8− 0.8A Step Down / Step Up / Inverting DC-DC Converter MC34063C 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 −9−