TECHNICAL DATA IL34063A DC-TO-DC CONVERTER CONTROL CIRCUITS The IL34063A 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. FEATURES FUNCTIONAL BLOCK DIAGRAM · · · · · · · Operation from 3.0 V to 40 V Input Low Standby Current Current Limiting Output Switch Current to 1.5 A Output Voltage Adjustable Frequency Operation to 100 kHz Precision 2% Reference 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 Ceramic Package, U Suffix TA = +25°C Thermal Resistance Plastic Package, P Suffix TA = +25°C Thermal Resistance SOIC Package, D Suffix TA = +25°C Thermal Resistance Operating Junction Temperature Operating Ambient Temperature Range Storage Temperature Range Symbol VCC VIR VC(switch) VE(switch) VCE(switch) IC(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 RqJA PD RqJA PD RqJA 1.25 100 1.25 100 625 160 +150 0 to +70 -65to+150 W °C/W W °C/W mW °C/W TJ TA Tstg °C °C °C Rev. 01 IL34063A ORDERING INFORMATION Device Temperature Range Package 34063AD SO-8 0° to +70°C 34063AN Plastic DIP Pin connection ELECTRICAL CHARACTERICISTICS (VCC = 5.0 V, TA= 0 to +70oC unless otherwise specified.) Characteristics Symbol OSCILLATOR Frequency (VPin 5 = 0 V, CT = 1.0 nF, TA = 25°C) fosc Charge Current (VCC = 5.0 V to 40 V, TA = 25°C) Ichg Discharge Current (VCC = 5.0 V to 40 V, TA = 25°C) Idischg Discharge to Charge Current Ratio (Pin7 to Vcc, TA=25°C) Idischg/Ichg Current Limit Sense Voltage (Ichg = Idischg, TA = 25°C) Vipk(sense) OUTPUT SWITCH (Note 3) Saturation Voltage, Darlington Connection (ISW = 1.0 A, Pins 1, VCE(sat) 8 connected) VCE(sat) Saturation Voltage (ISW = 1.0 A, RPin 8 = 82 W to VCC. Forced b = 20) hFE DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25°C) Collector Off-State Current (VCE = 40V) IC(off) COMPARATOR Threshold Voltage (TA = 25°C) Vth (TA = TLOW to THIGH) Threshold Voltage (TA = 25°C) ** Threshold Voltage Line Regulation (VCC = 3 0 V to 40 V) Input Bias Current (Vin=0V) Vth Regline IIB TOTAL DEVICE Supply Current (VCC = 5 0 V to 40 V, CT = 1 0 nF, Vpin7 = VCC. ICC VPin5 > Vth, Pin 2 = Gnd, Remaining pins open) Min Typ Max Unit 24 24 140 5.2 250 33 33 200 6.2 300 42 42 260 7.5 350 kHz mA mA — mV — 1.0 1.3 V — 0.45 0.7 V 50 — 120 0.01 — 100 — mA 1.225 1.21 1.2375 1.25 — 1.25 1.275 1.29 1.2625 V V — 1.4 -40 5.0 -400 mV nA 2.5 4.0 mA NOTES: 1. Maximum package power dissipation limits must be observed. 2. Low duty cycle pulse techniques are used during test to maintain Junction temperature as close to ambient temperature as possible 3. 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 ms 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 Forced b of output switch = IC, output/(Ic, driver -7.0 mA*) > 10 *The 100 W. resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts **Possible version for shipment Rev. 01 IL34063A TYPICAL APPLICATION CIRCUITS Step-Up Converter L1 170mH R3 8 DRC SWC Ipk SWE 1 180W 7 2 D1 BYV10-40 R SG 6 Vcc TC 3 0.22W V IN 5 Cll GND 12V C3 + C2 V OUT 4 34063A/E 100 mF R1 R2 2.2kW 47kW 1.5nF C3 + 330mF Test Condition (VOUT = 28 V) Test Conditions Line Regulation VIN = 8 to 16 V, IO = 175 mA Load Regulation VIN = 12 V, IO = 75 to 175 mA Output Ripple VIN = 12 V, IO = 175 mA Efficiency VIN = 12 V, IO = 175 mA Value (Typ) 30 10 300 89 Unit mV mV mV % Rev. 01 IL34063A Step-Down Converter 8 SW C DRC 1 BYV10-40 R SC 0.33W 7 SW E Ipk 2 D1 6 5 C2 TC Vcc GND Cll 3 L1 4 220mH C3 + 100 mF 34063A/E R1 R2 1.2kW 3.6kW 470pF C1 + 470mF Test Condition (VOUT = 5 V) Test Conditions Line Regulation VIN = 15 to 25 V, IO = 500 mA Load Regulation VIN = 25 V, IO = 50 to 500 mA Output Ripple VIN = 25 V, IO = 500 mA Efficiency VIN = 25 V, IO = 500 mA ISC VIN = 25 V, RLOAD = 0.1 W Value (Typ) 5 30 100 80 1.2 Unit mV mV mV % A Rev. 01 IL34063A Voltage Inverting Converter 8 SWC DRC 1 L1 7 R3 SWE Ipk 2 0.22W 90mH 6 VIN 5 TC Vcc GND Cll 3 4 D1 BYV10-40 4.5 to 6V C2 + 34063A/E 100mF R2 8.2kW C3 1.5nF R1 VOUT 953W -12V / 100mA C1 + Test Condition (VOUT = -12 V) Test Conditions Line Regulation VIN = 4.5 to 6 V, IO = 100 mA Load Regulation VIN = 5 V, IO = 10 to 100 mA Output Ripple VIN = 5 V, IO = 100 mA Efficiency VIN = 5 V, IO = 100 mA ISC VIN = 5 V, RLOAD = 0.1 W 1000mF Value (Typ) 15 20 230 58 0.9 Unit mV mV mV % A Rev. 01 IL34063A Calculation Parameter ton/toff (ton + toff)max CT IPK(switch) RSC CO L(min) Step-Up (Discontinuous mode) Vout +VF-V in(min) Vin(min) - Vsat 1/fmin 4.5x10-5ton 2Iout(max)[(ton/toff)+1] 0.3/IPK(switch) Ioutton º Vripple(p-p) Vin(min) - Vsat ton(max) IPK(switch) Step-Down (Continuous mode) Vout +VF Vin(min) - Vsat - Vout 1/fmin 4.5x10-5ton 2Iout(max) 0.3/IPK(switch) IPK(switch) (ton + toff) 8Vripple(p-p) Vin(min)-Vsat-Vout ton(max) IPK(switch) Voltage Inverting (Discontinuous mode) êVout ê+ VF Vin - Vsat 1/fmin 4.5x10-5ton 2Iout(max)[(ton/toff)+1] 0.3/IPK(switch) Ioutton º Vripple(p-p) Vin(min) - Vsat ton(max) IPK(switch) NOTES: 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, êVout ê = 1.25(1+R2/R1) Iout = Desired output current fmin = Minimum desired output switching frequency at the selected values of Vin and lo 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. Step-up With External NPN Switch VOUT 8 1 S Q + Q1 R 2 7 RSC VIN 6 Comparator + - Ipk Oscillator 3 1.25V Reference Regulator 4 5 Rev. 01 IL34063A Step-down With External NPN Switch 8 1 S Q Q2 Q1 R 2 7 RSC VIN Ipk Oscillator 6 VOUT 3 + Comparator 1.25 V Reforence Regulator 4 5 Step-down With External PNP Switch 8 1 S Q Q2 Q1 R VOUT 2 + 7 RSC VIN 6 Ipk Oscillator 3 1.25 V Reference Regulator 4 Comparator 5 Rev. 01 IL34063A Voltage Inverting With External NPN Switch 8 1 S Q Q2 Q1 R 2 7 VOUT RSC VIN Ipk Oscillator 6 3 + Comparator 1.25 V Reference Regulator 4 5 Voltage Inverting With External PNP Saturated Switch 8 1 S Q Q2 VOU T Q1 R 2 + 7 RSC VIN 6 Ip k Oscillator 3 1 .2 5 V Re f o r e n ce Regulator 4 Comparator 5 Rev. 01 IL34063A Dual Output Voltage +12V + GND + 8 1 S Q Q2 -12V Q1 R 2 7 RSC VIN 6 Ipk Oscillator 3 1.25 V Reforence Regulator 4 Comparator 5 Higher Output Power, Higher Input Voltage +VOUT + Isolated from input -VOUT + 8 S Q 1 Q2 Q1 R VIN 2 7 RSC 6 Ipk Oscillator 3 1.25 V Reforence Regulator 4 Comparator + - 5 Rev. 01 IL34063A N SUFFIX PLASTIC DIP (MS – 001BA) A Dimension, mm 5 8 B 1 4 F C -T- SEATING PLANE N M K 0.25 (0.010) M J H D MIN MAX A 8.51 10.16 B 6.1 7.11 C L G Symbol T NOTES: 1. Dimensions “A”, “B” do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side. 5.33 D 0.36 0.56 F 1.14 1.78 G 2.54 H 7.62 J 0° 10° K 2.92 3.81 L 7.62 8.26 M 0.2 0.36 N 0.38 D SUFFIX SOIC (MS - 012AA) Dimension, mm A 8 5 B H 1 G P 4 R x 45 C -TK D 0.25 (0.010) M SEATING PLANE J F T CM NOTES: 1. Dimensions A and B do not include mold flash or protrusion. 2. Maximum mold flash or protrusion 0.15 mm (0.006) per side for A; for B ‑ 0.25 mm (0.010) per side. M Symbol MIN MAX A 4.8 5 B 3.8 4 C 1.35 1.75 D 0.33 0.51 F 0.4 1.27 G 1.27 H 5.72 J 0° 8° K 0.1 0.25 M 0.19 0.25 P 5.8 6.2 R 0.25 0.5 Rev. 01