MC34063A
SCHEMATIC DIAGRAM
8
Drive
Collector
DC-TO-DC Converter Control Circuits
1
Switch
Collector
S Q
R
7
I
pk
Sense
I
pk
Oscillator G
T
6
V
CC
3
Timing
Capacitor
100
Q2
Q1
2
Switch
Emitter
+
Comparator
_
5
Comparator
Inverting
Input
1,25V
Reference
Regulator
4
GND
(Bottom View)
Figure 1. Representative Schematic Diagram
ABSOLUTE MAXIMUM RATINGS
Parameter
Power Supply Voltage
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage (V
Pin1
= 40 V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
Driver Collector Current (Note 1)
Switch Current
Power Dissipation, T
A
= 25°C
D Package
P Package
Thermal Resistance, T
A
= 25°C
D Package
P Package
Symbol
V
CC
V
IR
V
C(switch)
V
E(switch)
V
CE(switch)
V
C(driver)
I
C(driver)
I
SW
P
D
R
θJA
T
J
T
A
T
stg
Value
40
−0.3 to +40
40
40
40
40
100
1.5
625
1.25
160
100
+150
0 to +70
−65 to +150
°C/W
°C
°C
°C
Unit
V
V
V
V
V
V
mA
A
mW
W
Operating Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
2
WINGS [ WING SHING COMPUTER COMPONENTS ]
