Datasheet
MC33063A
MC34063A
www.ti.com
SLLS636M –DECEMBER 2004– REVISED JANUARY 2011
Absolute Maximum Ratings
(1)
over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
V
CC
Supply voltage 40 V
V
IR
Comparator Inverting Input voltage range –0.3 40 V
V
C(switch)
Switch Collector voltage 40 V
V
E(switch)
Switch Emitter voltage V
PIN1
= 40 V 40 V
V
CE(switch)
Switch Collector to Switch Emitter voltage 40 V
V
C(driver)
Driver Collector voltage 40 V
I
C(driver)
Driver Collector current 100 mA
I
SW
Switch current 1.5 A
D package 97
θ
JA
Package thermal impedance
(2) (3)
DRJ package 41 °C/W
P package 85
T
J
Operating virtual junction temperature 150 °C
T
stg
Storage temperature range –65 150 °C
(1) 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.
(2) 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.
(3) The package thermal impedance is calculated in accordance with JESD 51-7.
Recommended Operating Conditions
MIN MAX UNIT
V
CC
Supply voltage 3 40 V
MC33063A –40 85
T
A
Operating free-air temperature °C
MC34063A 0 70
Electrical Characteristics
V
CC
= 5 V, T
A
= full operating range (unless otherwise noted) (see block diagram)
Oscillator
PARAMETER TEST CONDITIONS T
A
MIN TYP MAX UNIT
f
osc
Oscillator frequency V
PIN5
= 0 V, C
T
= 1 nF 25°C 24 33 42 kHz
I
chg
Charge current V
CC
= 5 V to 40 V 25°C 24 35 42 μA
I
dischg
Discharge current V
CC
= 5 V to 40 V 25°C 140 220 260 μA
I
dischg
/I
chg
Discharge-to-charge current ratio V
PIN7
= V
CC
25°C 5.2 6.5 7.5
V
Ipk
Current-limit sense voltage I
dischg
= I
chg
25°C 250 300 350 mV
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