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Motorola Semiconductors - DC-to-DC CONVERTER CONTROL CIRCUITS

Numéro de référence MC34063A
Description DC-to-DC CONVERTER CONTROL CIRCUITS
Fabricant Motorola Semiconductors 
Logo Motorola Semiconductors 





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MC34063A fiche technique
DC-to-DC Converter
Control Circuits
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
Order this document by MC34063A/D
MC34063A
MC33063A
DC–to–DC CONVERTER
CONTROL CIRCUITS
SEMICONDUCTOR
TECHNICAL DATA
8
1
P, P1 SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
Representative Schematic Diagram
Drive 8
Collector
Ipk 7
Sense
6
VCC
Comparator 5
Inverting
Input
S Q Q2
R
100
Q1
Ipk
Oscillator
CT
Comparator
+ 1.25 V
Reference
Regulator
1
Switch
Collector
2 Switch
Emitter
3 Timing
Capacitor
4
Gnd
(Bottom View)
This device contains 51 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
PIN CONNECTIONS
Switch
Collector
Switch
Emitter
1
2
Timing 3
Capacitor
Gnd 4
8
Driver
Collector
7 Ipk Sense
(Top View)
6 VCC
Comparator
5 Inverting
Input
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC33063AD
SO–8
TA = – 40° to +85°C
MC33063AP1
Plastic DIP
MC33063AVD
SO–8
TA = –40° to +125°C
MC33063AVP
Plastic DIP
MC34063AD
MC34063AP1
TA = 0° to +70°C
SO–8
Plastic DIP
© Motorola, Inc. 1996
Rev 5
1

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