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SLVA342A

更新时间： 2024-11-21 06:11:59
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德州仪器 - TI /
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8页 142K
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Simple Power Solution Using LDOs

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SLVA342A 数据手册

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Application Report  
SLVA342A–June 2009–Revised May 2010  
Simple Power Solution Using LDOs  
Ambreesh Tripathi .......................................................................... PMP - DC/DC Low-Power Converters  
ABSTRACT  
This reference design helps those desiring to design-in the TMS320C6742, TMS320C6746,  
TMS320C6748, and OMAP-L138. This design, employing sequenced power supplies, describes a system  
with an input voltage of 3.3 V, and uses LDOs for a small, simple system.  
Sequenced power supply architectures are becoming commonplace in high-performance microprocessor  
and digital signal processor (DSP) systems. To save power and increase processing speeds, processor  
cores have smaller geometry cells and require lower supply voltages than the system bus voltages. Power  
management in these systems requires special attention. This application report addresses these topics  
and suggests solutions for output voltage sequencing.  
Contents  
1
2
3
4
Introduction .................................................................................................................. 2  
Power Requirements ....................................................................................................... 2  
Features ...................................................................................................................... 3  
List of Material ............................................................................................................... 6  
List of Figures  
1
2
3
PMP4980 Reference Design Schematic.................................................................................  
Optional Circuit for DVDD_A, DVDD_B, and DVDD_C................................................................  
Sequencing in Start-Up Waveform .......................................................................................  
4
5
7
List of Tables  
1
2
Power Requirements .......................................................................................................  
PMP4980 List of Material ..................................................................................................  
2
6
1
SLVA342A–June 2009–Revised May 2010  
Simple Power Solution Using LDOs  
Copyright © 2009–2010, Texas Instruments Incorporated  
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