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MC34063A Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers

Part No. MC34063A
Description  DC-DC Converter Control Circuits
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Maker  ETC1 [List of Unclassifed Manufacturers]
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MC34063A Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers

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DC-DC Converter Control Circuits
MC34063A
● OUTPUT SWITCH CURRENT IN EXCESS OF
1.5A
2% REFERENCE ACCURACY
LOW QUIESCENT CURRENT:2.5mA(TYP.)
OPERATING FROM 3V TO 40V
REQUENCY OPERATION TO 100KHz
ACTIVE CURRENT LIMITING
DESCRIPTION
The MC34063A series is a monolithic control
circuit delivering the main functions for DC-DC
voltage converting.
ORDERING INFORMATION
The device contains an intermal temperature
compensated reference, comparator, duty cycle
controlled oscillator with an active current limit
circuit driver and high current output switch.
Output voltage is adjustable through two external
resistors with a 2% reference accuracy.
Employing a minimum number of external
components the MC34063A devices series is
designed for Step-Down, Step-Up and
Voltage-lnverting applications.
BLOCK DIAGRAM
HTC
1
MC34063AN
8 DIP
Device
Package
MC34063AD
8 SOP
Ipk Oscillator
s
R
8
3
6
4
5
7
2
1
Q
+
Vcc
Drive
Collector
Ipk Sense
Switch
Emitter
Switch
Collector
GND
-
1.25V
Reference
Regulator
Comparator
lnverting
input
Comparator
Q2
Q1
Timing
Capacitor
1
2
3
4
8
7
6
5
Switch
Emitter
Timing
Capacitor
Ground
Ipk Sense
Vcc
Comparator
- Input
Drive
Collector
Switch
Collector
8 SOP/ 8 DIP PIN Configulation


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