MC34063A
DESCRIPTION
DC-TO-DC Converter Control Circuits
PIN CONFIGURATION
Switch
Collector
Switch
Emitter
Timing
Capacitor
GND
1
2
3
4
8
7
6
5
Diver
Collector
I
PK
Sense
V
CC
Comparator
Inverting
Input
The MC34063A is a monolithic control circuit containing
the primary functions required for DC-to-DC converters.
The device consists of an internal temperature compen-
sated reference, comparator, controlled duty cycle oscill-
ator with an active current limit circuit, driver and high
current output switch. MC34063A is specifically designed
to be incorporated in Step-Down, Step-Up and Voltage-
Inverting applications with a minimum number of extern-
al components.
(Top View)
FEATURES
Operation from
-0.3V
to 40V Input
Low Standby Current
Current Limiting
Output Switch Current to 1.5A
Output Voltage Adjustable
Frequency Operation to
42kHz
Precision 2% Reference
APPLICATION
DC-DC Converter
ORDERING INFORMATION
Temperature Range
Package
SOP8L
SOP8L
DIP8L
Orderable
Device
MC34063ADG
MC34063ADRG
MC34063APG
Package Qty
75Units/Tube
2500Units/Tape
50Units/Tube
0°C to +70°C
Pb-Free
1
WINGS [ WING SHING COMPUTER COMPONENTS ]
