IK Semicon IL34063A Dc-to-dc converter control circuit Datasheet

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
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