Image MC34063
型号: MC34063
厂商: ON Semiconductor ON Semiconductor
分类: 集成电路
描述: DC-to-DC converter control circuits
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Order this document by MC34063A/D  
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.  
SEMICONDUCTOR  
TECHNICAL DATA  
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  
8
1
P, P1 SUFFIX  
PLASTIC PACKAGE  
CASE 626  
8
1
D SUFFIX  
PLASTIC PACKAGE  
CASE 751  
(SO–8)  
PIN CONNECTIONS  
Representative Schematic Diagram  
Switch  
Collector  
Driver  
Collector  
8
7
6
5
1
2
Switch  
Emitter  
I
Sense  
pk  
1
8
7
6
Drive  
Collector  
Switch  
Collector  
Timing  
Capacitor  
V
3
4
CC  
Q2  
S Q  
R
Comparator  
Inverting  
Input  
Q1  
Gnd  
100  
I
pk  
Sense  
2
3
Switch  
Emitter  
(Top View)  
I
pk  
Oscillator  
C
T
ORDERING INFORMATION  
Operating  
Timing  
Capacitor  
V
CC  
Comparator  
Temperature Range  
Device  
Package  
1.25 V  
Reference  
Regulator  
+
MC33063AD  
MC33063AP1  
MC33063AVD  
MC33063AVP  
MC34063AD  
SO–8  
T
A
= – 40° to +85°C  
= –40° to +125°C  
5
4
Comparator  
Inverting  
Input  
Plastic DIP  
SO–8  
Gnd  
T
A
(Bottom View)  
Plastic DIP  
SO–8  
This device contains 51 active transistors.  
T
A
= 0° to +70°C  
MC34063AP1  
Plastic DIP  
Motorola, Inc. 1996  
Rev 5