IL34063A IKSEMICON | Alldatasheet

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Technical content

Rev. 01 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

  • 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 Symbol Value Unit Power Supply Voltage VCC 40 Vdc Comparator Input Voltage Range VIR -0.3 to +40 Vdc Switch Collector Voltage VC(switch) 40 Vdc Switch Emitter Voltage (Vpin 1 = 40 V) VE(switch) 40 Vdc Switch Collector to Emitter Voltage VCE(switch) 40 Vdc Driver Collector Voltage IC(driver) 40 Vdc Driver Collector Current (Note 1) IC(driver) 100 mA Switch Current ISW 1.5 A Power Dissipation and Thermal Characteristics Ceramic Package, U Suffix TA = +25°C Thermal Resistance Plastic Package, P Suffix TA = +25°C Thermal Resistance Thermal Resistance PD RqJA PD RqJA PD RqJA 1.25 100 1.25 100 625 160 W °C/W W °C/W mW °C/W Operating Junction Temperature TJ +150 °C Operating Ambient Temperature Range TA 0 to +70 °C Storage Temperature Range Tstg -65to+150 °C IL34063A

Rev. 01

ORDERING INFORMATION

Device Temperature Range Package 34063AD SO-8 34063AN 0° to +70°C Plastic DIP ELECTRICAL CHARACTERICISTICS (VCC = 5.0 V, TA= 0 to +70oC unless otherwise specified.) Characteristics Symbol Min Typ Max Unit OSCILLATOR Frequency (VPin 5 = 0 V, CT = 1.0 nF, TA = 25°C) fosc 24 33 42 kHz Charge Current (VCC = 5.0 V to 40 V, TA = 25°C) Ichg 24 33 42 mA Discharge Current (VCC = 5.0 V to 40 V, TA = 25°C) Idischg 140 200 260 mA Discharge to Charge Current Ratio (Pin7 to Vcc, TA=25°C) Idischg/Ichg 5.2 6.2 7.5 — Current Limit Sense Voltage (Ichg = Idischg, TA = 25°C) Vipk(sense) 250 300 350 mV OUTPUT SWITCH (Note 3) Saturation Voltage, Darlington Connection (ISW = 1.0 A, Pins 1, 8 connected) VCE(sat) — 1.0 1.3 V Saturation Voltage (ISW = 1.0 A, RPin 8 = 82 W to VCC. Forced b = 20) VCE(sat) — 0.45 0.7 V DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25°C) h FE 50 120 — — Collector Off-State Current (VCE = 40V) IC(off) — 0.01 100 mA COMPARATOR Threshold Voltage (TA = 25°C) (TA = TLOW to THIGH) Vth 1.225 1.21 1.25 1.275 1.29 V Threshold Voltage (TA = 25°C) ** Vth 1.2375 1.25 1.2625 V Threshold Voltage Line Regulation (VCC = 3 0 V to 40 V) Regline 1.4 5.0 mV Input Bias Current (Vin=0V) IIB — -40 -400 nA TOTAL DEVICE Supply Current (VCC = 5 0 V to 40 V, CT = 1 0 nF, Vpin7 = VCC. VPin5 > Vth, Pin 2 = Gnd, Remaining pins open) ICC 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 Pin connection

Rev. 01 TYPICAL APPLICATION CIRCUITS Step-Up Converter 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 % DRC 170mH Ipk Vcc Cll SWC SWE TC GND RSG R1 R2 180W 0.22W +C2 100 mF 2.2kW 47kW 1.5nF VOUT +C3 330mF VIN 12V 34063A/E BYV10-40

Rev. 01 Step-Down Converter 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 W 1.2 A DRC Ipk Vcc Cll SWC SWE TC GND 34063A/E RSC 0.33 W +C2 100 mF R1 R2 1.2k W 3.6k W +C1 470 mF 470pF 220 mH BYV10-40

Rev. 01 Voltage Inverting Converter 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 W 0.9 A DRC Ipk Vcc Cll SWC SWE TC GND 0.22W VIN 4.5 to 6V +C2 100mF R2 R1 8.2kW 953W 1000mF 1.5nF BYV10-40 90mH 34063A/E VOUT -12V / 100mA

Rev. 01 Calculation Parameter Step-Up (Discontinuous mode) Step-Down (Continuous mode) Voltage Inverting (Discontinuous mode) ton/toff Vout +VF-V in(min) Vout +VF êVout ê+ VF Vin(min) - Vsat Vin(min) - Vsat - Vout Vin - Vsat (ton + toff)max 1/fmin 1/fmin 1/fmin CT 4.5x10-5ton 4.5x10-5ton 4.5x10-5ton IPK(switch) 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 Ioutton IPK(switch) (ton + toff) Iouttonº Vripple(p-p) 8Vripple(p-p) º Vripple(p-p) L(min) V in(min) - Vsat V in(min)-Vsat-Vout V in(min) - Vsat IPK(switch) ton(max) IPK(switch) ton(max) IPK(switch) ton(max) 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 RSC VIN S R Q Ipk Oscillator 1.25V Reference Regulator Comparator

Rev. 01 Step-down With External NPN Switch S R Q Q2 Ipk Oscillator 1.25 V Reforence Regulator Comparator VIN RSC VOUT Step-down With External PNP Switch S R Q Q2 Ipk Oscillator 1.25 V Reference Regulator Comparator VIN RSC VOUT

Rev. 01 Voltage Inverting With External NPN Switch S R Q Q2 Ipk Oscillator 1.25 V Reference Regulator Comparator VIN RSC VOUT Voltage Inverting With External PNP Saturated Switch S R Q Q2 Ipk Oscillator 1.25 V Reforence Regulator Comparator V IN R SC V OUT

Rev. 01 Dual Output Voltage S R Q Q2 Ipk Oscillator 1.25 V Reforence Regulator Comparator VIN RSC +12V GND -12V Higher Output Power, Higher Input Voltage S R Q Q2 Ipk Oscillator 1.25 V Reforence Regulator Comparator RSC +VOUT -VOUT Isolated from input VIN

Rev. 01 N SUFFIX PLASTIC DIP (M S – 001BA) Symbol MIN MAX A 8.51 10.16 B 6.1 7.11 C 5.33 D 0.36 0.56 F 1.14 1.78 G H J 0° 10° K 2.92 3.81 NOTE S: L 7.62 8.26 1. Dim ensions “A”, “B” do not include mold flash or protrusions. M 0.2 0.36 Max im um m old flash or protrusions 0.25 mm (0.010) per side. N 0.38 D SU F F I X SOI C (M S - 012AA) 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 H J 0° 8° NOTE S: K 0.1 0.25 1. Dim ensions A and B do not include m old flash or protrusion. M 0.19 0.25 1.27 5.72 Dimens ion, mm Dimens ion, mm 2.54 7.62 A BH C K C M J F M P G D R x 45 SEA TING PLANE 0.25 (0.010) M T -T- L H M J A B F G D SEATING PLANE N K 0.25 (0.010) M T -T- C