DC-DC Converter Control Circuits
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
cc
V
ir
V
SWC
V
SWE
V
CE
V
dc
I
dc
I
sw
P
tot
T
op
PARAMETER
Power Supply Voltage
Comparator input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage (VSWC=40V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
Driver Collector Current
Switch Current
Power Dissipation at T
amb
=25℃(for Plastic Package )
(for SOIC Package )
Operating Ambient Temperature Range
MC34063A
VALUE
50
-0.3 to 40
40
40
40
40
100
1.5
1.25
0.625
0 to 70
UNIT
V
V
V
V
V
V
㎃
A
W
℃
℃
℃
℃
T
stg
Storage Temperature Range
-40 to 150
Absolute Maximum Rating are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
THERMAL DATA
SYMBOL
PARAMETER
R
thi-amb
Thermal Resistance Junction-ambient (
*
)
( ) This Value depends from thermal design of PCB on which the device is mounted.
*
Max
DIP-8
100
SO-8
160
UNIT
℃/w
CONNECTION DIAGRAM
(top view)
SWC
SWE
TC
GND
4
5
SC11080
PIN CONNECTIONS
PIN NO
1
2
3
4
5
6
7
8
SYMBOL
SWC
SWE
TC
GND
CII
Vcc
I
PK
DRC
NAME AND FUNCTION
Switch Collector
Switch Emitter
Timing Capactor
Ground
Comparator lnverting lnput
Voltage Supply
I
PK
Sense
Voltage Driver Collector
1
8
DRC
IPK
V
CC
CII
HTC
2
ETC [ ETC ]
