Part Number: MC33063AP1

Cross Number:

Item Description: IC REG BCK BST INV ADJ 1.5A 8DIP

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Motorola Corp 9949
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

MC33063AVP Plastic DIP
Order this document by MC34063A/D
DC–to–DC CONVERTER
CONTROL CIRCUITS
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
P, P1 SUFFIX
PLASTIC PACKAGE
CASE 626
PIN CONNECTIONS
SEMICONDUCTOR
TECHNICAL DATA
8
1
1
8
1
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
Driver
Collector
I
pk
Sense
V
CC
Comparator
Inverting
Input
(Top View)
Device
Operating
Temperature Range
Package
ORDERING INFORMATION
MC33063AD
MC33063AP1
T
A
= – 40° to +85°C
SO–8
Plastic DIP
MC33063AVD
T
A
= –40° to +125°C
SO–8
2
3
45
6
7
8
MC34063AD SO–8
MC34063AP1
T
A
= 0° to +70°C
Plastic DIP
1
MOTOROLA ANALOG IC DEVICE DATA
The MC34063A Series is a monolithic control circuit containing the
primary functions required for DC–to–DC converters. These devices consist
of an internal temperature compensated reference, comparator, controlled
duty cycle oscillator with an active current limit circuit, driver and high current
output switch. This series was specifically designed to be incorporated in
Step–Down and Step–Up and Voltage–Inverting applications with a
minimum number of external components. Refer to Application Notes
AN920A/D and AN954/D for additional design information.
Operation from 3.0 V to 40 V Input
Low Standby Current
Current Limiting
Output Switch Current to 1.5 A
Output Voltage Adjustable
Frequency Operation to 100 kHz
Precision 2% Reference
Representative Schematic Diagram
SQ
R
Q2
Q1
100
I
pk
Oscillator
C
T
Comparator
+
1.25 V
Reference
Regulator
1
2
3
45
6
7
8
Drive
Collector
I
pk
Sense
V
CC
Comparator
Inverting
Input
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
(Bottom View)
This device contains 51 active transistors.
Motorola, Inc. 1996 Rev 5
MC34063A MC33063A
2
MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
Rating Symbol Value Unit
Power Supply Voltage V
CC
40 Vdc
Comparator Input Voltage Range V
IR
0.3 to +40 Vdc
Switch Collector Voltage V
C(switch)
40 Vdc
Switch Emitter Voltage (V
Pin
1
= 40 V) V
E(switch)
40 Vdc
Switch Collector to Emitter Voltage V
CE(switch)
40 Vdc
Driver Collector Voltage V
C(driver)
40 Vdc
Driver Collector Current (Note 1) I
C(driver)
100 mA
Switch Current I
SW
1.5 A
Power Dissipation and Thermal Characteristics
Plastic Package, P, P1 Suffix
T
A
= 25°C P
D
1.25 W
Thermal Resistance R
θJA
100 °C/W
SOIC Package, D Suffix
T
A
= 25°C P
D
625 W
Thermal Resistance R
θJA
160 °C/W
Operating Junction Temperature T
J
+150 °C
Operating Ambient Temperature Range T
A
°C
MC34063A 0 to +70
MC33063AV –40 to +125
MC33063A 40 to +85
Storage Temperature Range T
stg
65 to +150 °C
NOTES: 1. Maximum package power dissipation limits must be observed.
2. ESD data available upon request.
ELECTRICAL CHARACTERISTICS (V
CC
= 5.0 V, T
A
= T
low
to T
high
[Note 3], unless otherwise specified.)
Characteristics Symbol Min Typ Max Unit
OSCILLATOR
Frequency (V
Pin
5
= 0 V, C
T
= 1.0 nF, T
A
= 25°C) f
osc
24 33 42 kHz
Charge Current (V
CC
= 5.0 V to 40 V, T
A
= 25°C) I
chg
24 35 42 µA
Discharge Current (V
CC
= 5.0 V to 40 V, T
A
= 25°C) I
dischg
140 220 260 µA
Discharge to Charge Current Ratio (Pin 7 to V
CC
, T
A
= 25°C) I
dischg
/I
chg
5.2 6.5 7.5
Current Limit Sense Voltage (I
chg
= I
dischg
, T
A
= 25°C) V
ipk(sense)
250 300 350 mV
OUTPUT SWITCH (Note 4)
Saturation Voltage, Darlington Connection (Note 5)
(I
SW
= 1.0 A, Pins 1, 8 connected)
V
CE(sat)
1.0 1.3 V
Saturation Voltage, Darlington Connection
(I
SW
= 1.0 A, R
Pin
8
= 82 to V
CC
, Forced β 20)
V
CE(sat)
0.45 0.7 V
DC Current Gain (I
SW
= 1.0 A, V
CE
= 5.0 V, T
A
= 25°C) h
FE
50 75
Collector Off–State Current (V
CE
= 40 V) I
C(off)
0.01 100 µA
NOTES: 3. T
low
= 0°C for MC34063A, –40°C for MC33063A, AV T
high
= +70°C for MC34063A, +85°C for MC33063A, +125°C for MC33063AV
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
5. If the output switch is driven into hard saturation (non–Darlington configuration) at low switch currents ( 300 mA) and high driver currents (30 mA),
it may take up to 2.0 µs for it to come out of saturation. This condition will shorten the off time at frequencies 30 kHz, and is magnified at high
temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non–Darlington
configuration is used, the following output drive condition is recommended:
*The 100 resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
Forced of output switch :
I
C
output
I
C
driver 7.0 mA *
10
MC34063A MC33063A
3
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (continued) (V
CC
= 5.0 V, T
A
= T
low
to T
high
[Note 3], unless otherwise specified.)
Characteristics UnitMaxTypMinSymbol
COMPARATOR
Threshold Voltage
T
A
= 25°C
T
A
= T
low
to T
high
V
th
1.225
1.21
1.25
1.275
1.29
V
Threshold Voltage Line Regulation (V
CC
= 3.0 V to 40 V)
MC33063A, MC34063A
MC33363AV
Reg
line
1.4
1.4
5.0
6.0
mV
Input Bias Current (V
in
= 0 V) I
IB
–20 400 nA
TOTAL DEVICE
Supply Current (V
CC
= 5.0 V to 40 V, C
T
= 1.0 nF, Pin 7 = V
CC
,
V
Pin
5
> V
th
, Pin 2 = Gnd, remaining pins open)
I
CC
4.0 mA
NOTES: 3. T
low
= 0°C for MC34063A, –40°C for MC33063A, AV T
high
= +70°C for MC34063A, +85°C for MC33063A, +125°C for MC33063AV
4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
5. If the output switch is driven into hard saturation (non–Darlington configuration) at low switch currents ( 300 mA) and high driver currents (30 mA),
it may take up to 2.0 µs for it to come out of saturation. This condition will shorten the off time at frequencies 30 kHz, and is magnified at high
temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non–Darlington
configuration is used, the following output drive condition is recommended:
*The 100 resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
Forced of output switch :
I
C
output
I
C
driver 7.0 mA *
10
t
on
V
CC
= 5.0 V
Pin 7 = V
CC
Pin 5 = Gnd
T
A
= 25
°
C
t
off
Figure 1. Output Switch On–Off Time versus
Oscillator Timing Capacitor
Figure 2. Timing Capacitor Waveform
0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0 5.0 10
C
T
, OSCILLATOR TIMING CAPACITOR (nF)
, OUTPUT SWITCH ON-OFF TIME ( s)
on–off
µ
t
10
µ
s/DIV
, OSCILLATOR VOLTAGE (V)
OSC
200 mV/DIV
V
V
CC
= 5.0 V
Pin 7 = V
CC
Pin 2 = Gnd
Pins 1, 5, 8 = Open
C
T
= 1.0 nF
T
A
= 25
°
C
1000
500
200
100
50
20
10
5.0
2.0
1.0
1234NEXT

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