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TECHNICAL DATA
DC-TO-DC CONVERTER CONTROL CIRCUITS
IL34063A
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 = +25C Thermal Resistance Plastic Package, P Suffix TA = +25C Thermal Resistance SOIC Package, D Suffix TA = +25C 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 PD RqJA PD RqJA PD RqJA
TJ
Value 40 -0.3 to +40 40 40 40 40 100 1.5 1.25 100 1.25 100 625 160 +150 0 to +70 -65to+150
Unit Vdc Vdc Vdc Vdc Vdc Vdc mA A W C/W W C/W mW C/W C C C
TA Tstg
Rev. 01
IL34063A
ORDERING INFORMATION Device Temperature Range Package 34063AD SO-8 0 to +70C 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 = 25C) fosc Charge Current (VCC = 5.0 V to 40 V, TA = 25C) Ichg Discharge Current (VCC = 5.0 V to 40 V, TA = 25C) Idischg Discharge to Charge Current Ratio (Pin7 to Vcc, TA=25C) Idischg/Ichg Current Limit Sense Voltage (Ichg = Idischg, TA = 25C) Vipk(sense) OUTPUT SWITCH (Note 3) Saturation Voltage, Darlington Connection (ISW = 1.0 A, Pins 1, VCE(sat)
8 connected)
Min 24 24 140 5.2 250 -- -- 50 -- 1.225 1.21 1.2375
Typ 33 33 200 6.2 300 1.0 0.45 120 0.01 1.25 -- 1.25 1.4 -40 2.5
Max 42 42 260 7.5 350 1.3 0.7 -- 100 1.275 1.29 1.2625 5.0 -400 4.0
Unit kHz mA mA -- mV V V -- mA V V mV nA mA
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 = 25C) Collector Off-State Current (VCE = 40V) IC(off) COMPARATOR Threshold Voltage (TA = 25C) Vth
(TA = TLOW to THIGH) Threshold Voltage (TA = 25C) ** 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)
--
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 180W
8
DRC
SWC
1
7
Ipk
SWE
2
D1 BYV10-40
RSG 0.22W VIN 12V C2 100 mF +
6
Vcc
TC
3
5
Cll
GND
4 C3
VOUT
34063A/E
1.5nF
R1 2.2kW
R2 47kW 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
DRC
SW C
1 BYV10-40
RSC 0.33W
7
Ipk
SW E
2 D1
6
Vcc
TC
3
5 C2 100 mF +
Cll
GND
4 C3
L1 220mH
34063A/E
470pF
R1 1.2kW
R2 3.6kW 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
DRC
SWC
1 L1
R3 0.22W
7
Ipk
SWE
2 90mH
6
Vcc
TC
3
VIN 4.5 to 6V C2 100mF +
5
Cll
GND
4
D1 BYV10-40 C3 1.5nF
34063A/E
R2 8.2kW
R1 953W +
VOUT -12V / 100mA C1 1000mF
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
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) NOTES:
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 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) eVout e+ VF Vin - Vsat 1/fmin 4.5x10-5ton 2Iout(max)[(ton/toff)+1] 0.3/IPK(switch) Ioutton Vripple(p-p) Vin(min) - Vsat ton(max) IPK(switch)
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, eVout e = 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
8
VOUT
SQ R
1
+
Q1
2
7
RSC VIN
6 Comparator
Ipk Oscillator 1.25V Reference Regulator
3
+
5
4
Rev. 01
IL34063A
Step-down With External NPN Switch
8 1
SQ R
Q2 Q1
2 7
RSC
Ipk Oscillator
3
VOUT +
VIN
6
Comparator 1.25 V Reforence Regulator 4
5
Step-down With External PNP Switch
8 1
SQ R
Q2 Q1
+ VOUT
2 7
RSC
Ipk Oscillator
3
VIN
6
Comparator 1.25 V Reference Regulator 4
5
Rev. 01
IL34063A
Voltage Inverting With External NPN Switch
8 1
SQ R
Q2 Q1
2 7
VOUT RSC
Ipk Oscillator 3
VIN
6
Comparator 1.25 V Reference Regulator 4
+
5
Voltage Inverting With External PNP Saturated Switch
8 1
S R
Q
Q2 Q1
VOU T
2 7
+
RSC
Ip k Oscillator
3
VIN
6
Comparator 1 .2 5 V Re f o r e n ce Regulator 4
5
Rev. 01
IL34063A
Dual Output Voltage
+12V
+
GND
8 1
+
SQ R
Q2 Q1
-12V
2 7
RSC
Ipk Oscillator
3
VIN
6
Comparator 1.25 V Reforence Regulator 4
5
Higher Output Power, Higher Input Voltage
+VOUT
+
Isolated from input -VOUT
+
8
SQ R
Q2 Q1
1
VIN
7
2
RSC
6 Comparator + 5
Ipk Oscillator
3
1.25 V Reforence Regulator
4
Rev. 01
IL34063A
N SUFFIX PLASTIC DIP (MS - 001BA)
A 8 5 B 1 4
Dimension, mm Symbol A B MIN 8.51 6.1 MAX 10.16 7.11 5.33 0.36 1.14 2.54 7.62 0 2.92 7.62 0.2 0.38 10 3.81 8.26 0.36 0.56 1.78
F
L
C D
C -T- SEATING
PLANE
F G
M H J
N G D 0.25 (0.010) M T K
H J K L M N
NOTES: 1. Dimensions "A", "B" do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side.
D SUFFIX SOIC (MS - 012AA) Dimension, mm
5
A 8
Symbol A
B P
MIN 4.8 3.8 1.35 0.33 0.4 1.27 5.72 0 0.1 0.19 5.8 0.25
MAX 5 4 1.75 0.51 1.27
H
B C
1
G
4 C R x 45
D F G
J F M
-TD 0.25 (0.010) M T CM K
SEATING PLANE
H J K M P R
8 0.25 0.25 6.2 0.5
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.
Rev. 01

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