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MC33063A 데이터시트(PDF) 7 Page - Texas Instruments

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부품명 MC33063A
상세설명  1.5-A Peak Boost/Buck/Inverting Switching Regulators
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
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Q
S
1.25-V
Reference
Regulator
R
CT
Ipk
Oscillator
Q2
Q1
Switch
Collector
4
Switch
Emitter
Timing
Capacitor
GND
3
2
1
8
7
6
5
Comparator
Inverting Input
VCC
Ipk
Sense
Drive
Collector
100 W
MC33063A, MC34063A
www.ti.com
SLLS636N – DECEMBER 2004 – REVISED JANUARY 2015
8 Detailed Description
8.1 Overview
The MC33063A and MC34063A devices are easy-to-use ICs containing all the primary circuitry needed for
building simple DC-DC converters. These devices primarily consist of an internal temperature-compensated
reference, a comparator, an oscillator, a PWM controller with active current limiting, a driver, and a high-current
output switch. Thus, the devices require minimal external components to build converters in the boost, buck, and
inverting topologies.
The MC33063A device is characterized for operation from –40°C to 85°C, while the MC34063A device is
characterized for operation from 0°C to 70°C.
8.2 Functional Block Diagram
8.3 Feature Description
Wide Input Voltage Range: 3 V to 40 V
High Output Switch Current: Up to 1.5 A
Adjustable Output Voltage
Oscillator Frequency Up to 100 kHz
Precision Internal Reference: 2%
Short-Circuit Current Limiting
Low Standby Current
8.4 Device Functional Modes
8.4.1 Standard operation
Based on the application, the device can be configured in multiple different topologies. See the Application and
Implementation section for how to configure the device in several different operating modes.
Copyright © 2004–2015, Texas Instruments Incorporated
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Product Folder Links: MC33063A MC34063A


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