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MC34063 Datasheet(Fiches technique) 1 Page - ON Semiconductor

Numéro de pièce MC34063
Description  DC-to-DC Converter Control Circuits
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
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© Semiconductor Components Industries, LLC, 2000
August, 2000 – Rev. 6
1
Publication Order Number:
MC34063A/D
MC34063A, MC33063A
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
Representative Schematic Diagram
SQ
R
Q2
Q1
100
Ipk
Oscillator CT
Comparator
+
-
1.25 V
Reference
Regulator
1
2
3
4
5
6
7
8
Drive
Collector
Ipk
Sense
VCC
Comparator
Inverting
Input
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
(Bottom View)
This device contains 51 active transistors.
http://onsemi.com
SO–8
D SUFFIX
CASE 751
PDIP–8
P, P1 SUFFIX
CASE 626
1
8
1
8
1
8
SOEIAJ–8
M SUFFIX
CASE 968
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
ORDERING INFORMATION
See general marking information in the device marking
section on page 11 of this data sheet.
DEVICE MARKING INFORMATION
1
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
Driver
Collector
Ipk Sense
VCC
Comparator
Inverting
Input
(Top View)
2
3
45
6
7
8
PIN CONNECTIONS




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