UNISONIC TECHNOLOGIES CO., LTD
MC34063A
DC TO DC CONVERTER
CONTROLLER
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
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
DIP-8
SOP-8
SOP-8
Packing
Tube
Tape Reel
Tube
MARKING
DIP-8
8
7
6
SOP-8
5
UTC
MC34063AG
1
2
3
4
Date Code
Lot Code
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
1 of 9
QW-R103-008. K
MC34063A
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
Switch Collector
Switch Emitter
Timing Capacitor
GND
1
2
3
4
8
7
6
5
Driver Collector
I
PEAK
Sense
V
CC
Comparator Inverting input
PIN DESCRIPTION
PIN NAME
Switch Collector
Switch Emitter
Timing Capacitor
GND
Comparator Inverting
Input
V
CC
I
PEAK
Sense
Driver Collector
I/O
I
O
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
Current sense input to monitor the voltage drop across an external
resistor placed in series with V
CC
Internal Darlington pairs TI collector
PIN NO
1
2
3
4
5
6
7
8
I
I
I
BLOCK DIAGRAM
E
Switch Collector
1
T1
Switch Emitter
2
A
Timing Capacitor
3
COMP.
T2
Q
S
R
D
C
Is
8
Drive Collector
7
I
PEAK
Sense
CT
OSCILLATOR
6
Vcc
GND
4
1.25V
REF
B
5
Comparator Inverting
Input
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www.unisonic.com.tw
2 of 9
QW-R103-008.K
MC34063A
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
(T
A
=25°C, unless otherwise specified. )
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
V
CC
40
V
Comparator Input Voltage
V
IN(COMP)
-0.3 ~ +40
V
Switch Collector Voltage
V
C(SW)
40
V
Switch Emitter Voltage
V
E(SW)
40
V
Switch Collector to Emitter Voltage
V
CE(SW)
40
V
Driver Collector Voltage
V
C(DR)
40
V
Switch Current
I
SW
1.5
A
DIP-8
1250
Power Dissipation (T
A
=25C)
P
D
mW
SOP-8
625
Junction Temperature
T
J
+150
°C
Operating Temperature
T
OPR
0 ~ +70
°C
Storage Temperature
T
STG
-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
SYMBOL
DIP-8
SOP-8
θ
JA
RATINGS
100
160
UNIT
°C/W
Junction-to-Ambient
ELECTRICAL CHARACTERISTICS
(V
CC
=5.0V, T
A
=0~+70°C, unless otherwise specified.)
SYMBOL
F
OSC
I
CHG
I
DISCHG
V
OSC
K
V
SENSE
V
CE(SAT)1
V
CE(SAT)2
G
I (DC)
I
C(OFF)
V
THD
V
THD
I
I(BIAS)
I
CC
TEST CONDITIONS
V
PIN
5=0V, CT=1.0nF, T
A
=25°C
V
CC
=5 to 40V, T
A
=25°C
V
CC
=5 to 40V, T
A
=25°C
T
A
=25°C
V
7
=V
CC
, T
A
=25°C
I
CHG
=I
DISCHG
, T
A
=25°C
I
SW
=1.0A, V
C(DRIVER)
=V
C(SW)
I
SW
=1.0A, V
C(DRIVER)
=50mA
I
SW
=1.0A, V
CE
=5.0V, T
A
=25°C
V
CE
=40.0V, T
A
=25°C
MIN
24
22
140
5.2
250
TYP MAX UNIT
42
42
260
7.5
350
1.3
0.7
100
kHz
μA
μA
V
mV
V
V
μA
V
mV
nA
mA
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
Supply Current
31
190
0.5
6.1
300
0.95
0.45
180
0.01
50
V
CC
=3 ~ 40V
V
IN
=0V
1.21 1.25 1.29
2.0
5.0
50
400
2.7
4.0
V
CC
=5~40V, C
T
=0.001
V
7
=V
CC
, V
C
>V
THD
, Pin2=GND
Note: Output switch tests are performed under pulsed conditions to minimize power dissipation.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 9
QW-R103-008.K
MC34063A
STEP-UP CONVERTER
170μH
L
8
180
S Q
R
7
I
PK
R
SC
0.22
V
IN
12V
6
+
100
V
CC
+
- Comp.
5
R
2
R
1
2.2k
47k
330
1.25V
R
EF
R
EG
O
SC
C
T
3
C
T
1500pF
4
Q2
Q1
2
1
LINEAR INTEGRATED CIRCUIT
1N5819
1.0μH
+
C
O
V
OUT
28V/175mA
V
OUT
+
100
Optional Filter
TEST
Line Regulation
Load Regulation
Output Ripple
Efficiency
Output Ripple With Optional Filter
CONDITIONS
V
IN
= 8.0V ~ 16V, I
OUT
= 175mA
V
IN
= 12V, I
OUT
= 75mA ~ 175mA
V
IN
= 12V, I
OUT
= 175mA
V
IN
= 12V, I
OUT
= 175mA
V
IN
= 12V, I
OUT
= 175mA
RESULTS
30mV = ±0.05%
10mV = ±0.017%
400mV
P-P
87.7%
40mV
P-P
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 9
QW-R103-008.K
MC34063A
STEP-DOWN CONVERTER(Cont.)
LINEAR INTEGRATED CIRCUIT
TEST
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Output Ripple With Optional Filter
CONDITIONS
V
IN
= 15V ~ 25V, I
OUT
= 500mA
V
IN
= 25V, I
OUT
= 50mA ~ 500mA
V
IN
= 25V, I
OUT
= 500mA
V
IN
= 25V, R
L
= 0.1Ω
V
IN
= 25V, I
OUT
= 500mA
V
IN
= 25V, I
OUT
= 500mA
RESULTS
12mV = ±0.12%
3.0mV = ±0.03%
120mV
P-P
1.1A
83.7%
40mV
P-P
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 9
QW-R103-008.K
Test/Measurement
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