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MC34063ABD 其他数据使用手册 - ST Microelectronics（意法半导体）
制造商:
ST Microelectronics（意法半导体）
分类:
稳压芯片
封装:
SOP-8
描述:
DC- DC转换器控制电路 DC-DC CONVERTER CONTROL CIRCUITS
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MC34063ABD数据手册
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© Semiconductor Components Industries, LLC, 2005
June, 2005 − Rev. 16
1 Publication Order Number:
MC34063A/D
MC34063A, MC33063A,
NCV33063A
1.5 A, Step−Up/Down/
Inverting Switching
Regulators
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
• Pb−Free Packages are Available
Figure 1. 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
GN
D
(Bottom View)
This device contains 51 active transistors.
SOIC−8
D SUFFIX
CASE 751
PDIP−8
P, P1 SUFFIX
CASE 626
1
8
1
8
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
GN
D
Driver
Collector
I
pk
Sense
V
CC
Comparator
Inverting
Input
(Top View)
2
3
45
6
7
8
PIN CONNECTIONS
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