MC34063
LINEAR INTEGRATED CIRCUIT
DC TO DC CONVERTER
CONTROLLER
DESCRIPTION
The Contek MC34063 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.
SOP-8
DIP-8
PIN CONFIGURATION
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
1
2
Contek
MC34063
3
4
Driver
8
Collector
7
Lpk Sense
6
Vcc
Comparator
5
Inverting input
BLOCK DIAGRAM
SWITCH
COLLECTOR
1
SWITCH
EMITTER
2
TIMING
CAPACITOR
3
E
T2
T1
A
S
Q
R
C
Is
CT
OSCILLATOR
GND
4
1.25Vref
COMP.
Contek
D
B
8
DRIVE
COLLECTOR
7
Ipeak
SENSE
6 Vcc
5
COMPARATOR
INVERTINGINPUT
Contek Microelectronics Co.,Ltd.
1
CONTEK
http://www.contek-ic.com E-mail:sales@contek-ic.com