MC33063A, MC34063A
1.5-A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS
SLLS636J – DECEMBER 2004 – REVISED OCTOBER 2005
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FUNCTIONAL BLOCK DIAGRAM
8
1
Drive
Collector
Switch
Collector
S Q
R
100
Ω
I
pk
Sense
7
Q2
Q1
2
Switch
Emitter
I
pk
Oscillator
C
T
6
V
CC
3
Timing
Capacitor
+
−
Comparator
Inverting Input
5
1.25-V
Reference
Regulator
4
GND
Absolute Maximum Ratings
(1)
over operating free-air temperature range (unless otherwise noted)
MIN
V
CC
V
IR
V
C(switch)
V
E(switch)
V
CE(switch)
V
C(driver)
I
C(driver)
I
SW
θ
JA
T
J
T
stg
(1)
(2)
(3)
Supply voltage
Comparator Inverting Input voltage range
Switch Collector voltage
Switch Emitter voltage
Switch Collector to Switch Emitter voltage
Driver Collector voltage
Driver Collector current
Switch current
D package
Package thermal impedance
(2) (3)
Operating virtual junction temperature
Storage temperature range
–65
DRJ package
P package
V
PIN1
= 40 V
–0.3
MAX
40
40
40
40
40
40
100
1.5
97
TBD
85
150
150
°C
°C
°C/W
UNIT
V
V
V
V
V
V
mA
A
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating
conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Maximum power dissipation is a function of T
J
(max),
θ
JA
, and T
A
. The maximum allowable power dissipation at any allowable ambient
temperature is P
D
= (T
J
(max) – T
A
)/θ
JA
. Operating at the absolute maximum T
J
of 150°C can affect reliability.
The package thermal impedance is calculated in accordance with JESD 51-7.
2
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