UTC MC34063A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R103-008,A
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.
DIP-8
SOP-8
PIN CONFIGURATION
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
Driver
Collector
Lpk Sense
Vcc
Comparator
Inverting input
1
2
3
4
8
7
5
6
BLOCK DIAGRAM
8
7
5
4
2
1
3
6
Q
S
R
C
E
T1
T2
A
Is
D
B
CT
Vcc
GND
TIMING
CAPACITOR
SWITCH
EMITTER
SWITCH
COLLECTOR
1.25Vref
COMP.
OSCILLATOR
COMPARATOR
INVERTING INPUT
Ipeak
SENSE
DRIVE
COLLECTOR
UTC MC34063A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R103-008,A
ABSOLUTE MAXIMUM RATINGS
(Ta=25
C )
PARAMETER
SYMBOL
VALUE
UNIT
Supply Voltage
Vcc
40
V
Comparator input voltage range
Vi(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
ELECTRICAL CHARACTERISTICS
( Ta=25
C )
(Vcc=5.0V,Ta=0~70
C,unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP.
MAX
UNIT
Oscillator
Charging Current
Ichg
Vcc=5 to 40V,Ta=25
C
22
31
42
A
Discharging Current
Idischg
Vcc=5 to 40V,Ta=25
C
140
190
260
A
Oscillator Amplitude
Vosc
Ta=25
C
0.5
V
Discharge to Charge Current Ratio
K
V7=Vcc,Ta=25
C
5.2
6.1
7.5
Current limit Sense Voltage
Vsense
Ichg=Idischg
Ta=25
C
250
300
350
mV
Output Switch
Saturation Voltage 1(note)
Vce(sat)1
Isw=1.0A
Vc(driver)=Vc(sw)
0.95
1.3
V
Saturation Voltage 2(note)
Vce(sat)2
Isw=1.0A
Vc(driver)=50mA
0.45
0.7
V
DC Current Gain(note)
Gi(DC)
Isw=1.0A
Vce=5.0V,Ta=25
C
50
180
Collector Off State Current(note)
C(off)
Vce=40.0V,Ta=25
C
0.01
100
A
Comparator
Threshold Voltage
Vth
1.21
1.24
1.29
V
Threshold voltage Line Regulation
Vth
Vcc=3~40V
2.0
5.0
mV
Input Bias Current
Ibias
Vi=0V
50
400
nA
Total Device
Vcc=5~40V
Ct=0.001
Supply Current
Icc
V7=Vcc
2.7
4.0
mA
Vc>Vth
Pin2=GND
NOTE: Output switch tests are performed under pulsed conditions to minimize power dissipation.
UTC MC34063A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R103-008,A
UTC MC34063A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R103-008,A
UTC MC34063A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R103-008,A
UTC MC34063A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
6
QW-R103-008,A
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