Datasheet

UNISONIC TECHNOLOGIES CO., LTD
MC34063A
LINEAR INTEGRATED CIRCUIT
DC TO DC CONVERTER
CONTROLLER

DESCRIPTION
The UTC MC34063A is a monolithic regulator subsystem,
intended for use as DC to DC converter. This device contains a
temperature compensated band gap reference, a duty-cycle
control oscillator, driver and high current output switch. It can be
used for step down, step-up or inverting switching regulators as
well as for series pass regulators.

FEATURES
* Operation from 3.0V to 40V.
* Short circuit current limiting.
* Low standby current.
* Output switch current of 1.5A without external transistors.
* Frequency of operation from 100Hz to 100kHz.
* Step-up, step-down or inverting switch regulators.

ORDERING INFORMATION
Ordering Number
Lead Free
MC34063AL-D08-T
-

Halogen Free
MC34063AG-D08-T
MC34063AG-S08-R
MC34063AG-S08-T
Package
Packing
DIP-8
SOP-8
SOP-8
Tube
Tape Reel
Tube
MARKING
DIP-8
SOP-8
8
7
6
5
UTC
MC34063AG
1
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Copyright © 2014 Unisonic Technologies Co., Ltd
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3
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Date Code
Lot Code
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QW-R103-008. K
MC34063A
PIN CONFIGURATION


Switch Collector
1
8
Driver Collector
Switch Emitter
2
7
IPEAK Sense
Timing Capacitor
3
6
VCC
GND
4
5
Comparator Inverting input
PIN DESCRIPTION
PIN NO
1
2
3
4
I/O
I
O
6
PIN NAME
Switch Collector
Switch Emitter
Timing Capacitor
GND
Comparator Inverting
Input
VCC
7
IPEAK Sense
I
8
Driver Collector
I
5

LINEAR INTEGRATED CIRCUIT
DESCRIPTION
Internal Darlington pairs TI collector
Internal Darlington pairs TI emitter
The value of selected capacitor controls the internal oscillator run rate
Inverting input of comparator which can set & initiate the Darlington pairs
output switch
I
Current sense input to monitor the voltage drop across an external
resistor placed in series with VCC
Internal Darlington pairs TI collector
BLOCK DIAGRAM
E
Switch Collector
T2
1
S
Q
R
T1
Switch Emitter
8
Drive Collector
7
IPEAK Sense
6
Vcc
5
Comparator Inverting
Input
D
C
2
A
Is
CT
OSCILLATOR
Timing Capacitor
3
COMP.
GND
4
1.25VREF
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MC34063A

LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25°C, unless otherwise specified. )
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
40
V
Comparator Input Voltage
VIN(COMP)
-0.3 ~ +40
V
Switch Collector Voltage
VC(SW)
40
V
Switch Emitter Voltage
VE(SW)
40
V
Switch Collector to Emitter Voltage
VCE(SW)
40
V
Driver Collector Voltage
VC(DR)
40
V
Switch Current
ISW
1.5
A
DIP-8
1250
Power Dissipation (TA=25C)
PD
mW
SOP-8
625
Junction Temperature
TJ
+150
°C
Operating Temperature
TOPR
0 ~ +70
°C
Storage Temperature
TSTG
-65 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device which the device could be permanently
damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.

THERMAL DATA
PARAMETER
Junction-to-Ambient

SYMBOL
DIP-8
SOP-8
RATINGS
100
160
θJA
UNIT
°C/W
ELECTRICAL CHARACTERISTICS (VCC=5.0V, TA=0~+70°C, unless otherwise specified.)
PARAMETER
OSCILLATOR
Maximum Oscillator Frequency
Charging Current
Discharging Current
Oscillator Amplitude
Discharge to Charge Current Ratio
Current limit Sense Voltage
OUTPUT SWITCH
Saturation Voltage 1 (Note)
Saturation Voltage 2 (Note)
DC Current Gain (Note)
Collector Off State Current (Note)
COMPARATOR
Threshold Voltage
Threshold Voltage Line Regulation
Input Bias Current
TOTAL DEVICE
SYMBOL
FOSC
ICHG
IDISCHG
VOSC
K
VSENSE
VCE(SAT)1
VCE(SAT)2
GI (DC)
IC(OFF)
VTHD
VTHD
II(BIAS)
TEST CONDITIONS
VPIN 5=0V, CT=1.0nF, TA=25°C
VCC=5 to 40V, TA=25°C
VCC=5 to 40V, TA=25°C
TA=25°C
V7=VCC, TA=25°C
ICHG=IDISCHG, TA=25°C
ISW=1.0A, VC(DRIVER)=VC(SW)
ISW=1.0A, VC(DRIVER)=50mA
ISW=1.0A, VCE=5.0V, TA=25°C
VCE=40.0V, TA=25°C
VCC=3 ~ 40V
VIN=0V
MIN
24
22
140
5.2
250
ICC
UNISONIC TECHNOLOGIES CO., LTD
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31
190
0.5
6.1
300
42
42
260
kHz
μA
μA
V
7.5
350
mV
1.3
0.7
V
V
100
μA
1.21 1.25 1.29
2.0
5.0
50
400
V
mV
nA
50
VCC=5~40V, CT=0.001
V7=VCC, VC>VTHD, Pin2=GND
Note: Output switch tests are performed under pulsed conditions to minimize power dissipation.
Supply Current
TYP MAX UNIT
0.95
0.45
180
0.01
2.7
4.0
mA
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MC34063A

LINEAR INTEGRATED CIRCUIT
STEP-UP CONVERTER
170μH
L
8
1
180
S Q
Q2
Q1
R
7
2
1N5819
IPK
RSC 0.22
VIN12V
OSC
6
+
100
CT
3
CT
VCC
+
- Comp.
1.25V
REF REG
5
1500pF
4
1.0μH
R2
R1
2.2k
47k
330
+
CO
VOUT
28V/175mA
VOUT
+
100
Optional Filter
TEST
Line Regulation
Load Regulation
Output Ripple
Efficiency
Output Ripple With Optional Filter
CONDITIONS
VIN = 8.0V ~ 16V, IOUT = 175mA
VIN = 12V, IOUT = 75mA ~ 175mA
VIN = 12V, IOUT = 175mA
VIN = 12V, IOUT = 175mA
VIN = 12V, IOUT = 175mA
UNISONIC TECHNOLOGIES CO., LTD
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RESULTS
30mV = ±0.05%
10mV = ±0.017%
400mVP-P
87.7%
40mVP-P
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MC34063A

LINEAR INTEGRATED CIRCUIT
STEP-DOWN CONVERTER(Cont.)
TEST
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Output Ripple With Optional Filter
CONDITIONS
VIN = 15V ~ 25V, IOUT = 500mA
VIN = 25V, IOUT = 50mA ~ 500mA
VIN = 25V, IOUT = 500mA
VIN = 25V, RL = 0.1Ω
VIN = 25V, IOUT = 500mA
VIN = 25V, IOUT = 500mA
UNISONIC TECHNOLOGIES CO., LTD
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RESULTS
12mV = ±0.12%
3.0mV = ±0.03%
120mVP-P
1.1A
83.7%
40mVP-P
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MC34063A

LINEAR INTEGRATED CIRCUIT
VOLTAGE INVERTING CONVERTER
TEST
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Output Ripple With Optional Filter
CONDITIONS
VIN = 4.5V ~ 6.0V, IOUT = 100mA
VIN = 5.0V, IOUT = 10mA ~ 100mA
VIN = 5.0V, IOUT = 100mA
VIN = 5.0V, RL = 0.1Ω
VIN = 5.0V, IOUT = 100mA
VIN = 5.0V, IOUT = 100mA
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
RESULTS
3.0mV = ±0.012%
0.022V = ±0.09%
500mVP-P
910mA
62.2%
70mVP-P
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MC34063A

LINEAR INTEGRATED CIRCUIT
EXTERNAL CURRENT BOOST CONNECTIONS FOR IC PEAK GREATER THAN 1.5A
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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MC34063A

LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
3
10
102
Output Switch ON-OFF Time versus
Oscillator Timing Capacitor
Timing Capacitor Waveform
VCC = 5.0V
Pin 7 = VCC
Pin 5 = GND
TA = 25℃
tON
101
tOFF
100
10-2
10-1
101
100
Oscillator Timing Capacitor, CT (nF)
UNISONIC TECHNOLOGIES CO., LTD
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VCC = 5.0V
Pin 1,5,8 = Open
Pin 7 = VCC CT = 1.0nF
Pin 2 = GND TA = 25℃
10μs/DIV
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MC34063A

LINEAR INTEGRATED CIRCUIT
DESIGN FORMULA TABLE
CALCULATION
tON
tOFF
STEP-DOWN
STEP-UP
VOLTAGE-INVERTING
VOUT + VF
VIN - VCE(SAT)
(tON+tOFF)MAX
1
FMIN
CT
4x10-5 tON
ISW
2IOUT(MAX)
RS
0.3/ISW
1
FMIN
4x10-5 tON
4x10-5 tON
0.3/ISW
0.3/ISW
L(MIN)
CO
IOUT tON
VRIPPLE(P-P)
VCE(SAT)
- Saturation voltage of the output switch.
VF
- Forward voltage drop of the ringback rectifier.
The following power supply characteristics must be chosen:
- Nominal input voltage.
VIN
VOUT
- Desired output voltage, VOUT =1.25(1+R2/R1)
IOUT
- Desired output current.
FMIN
- Minimum desired output switching frequency at the selected values for VIN and IOUT.
VRIPPLE(P-P) - Desired peak-to-peak output ripple voltage. In practice, the calculated value will need to be increased
due to the capacitor equivalent series resistance and board layout. The ripple voltage should be kept
to a low value since it will directly effect the line and load regulation.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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