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TPS62021

更新时间： 2024-11-22 22:36:51
品牌 Logo 应用领域
德州仪器 - TI 转换器功效
页数 文件大小 规格书
18页 415K
描述
600 mA/1.25 MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER

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中文翻译

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TPS62021 数据手册

 浏览型号TPS62021的Datasheet PDF文件第2页浏览型号TPS62021的Datasheet PDF文件第3页浏览型号TPS62021的Datasheet PDF文件第4页浏览型号TPS62021的Datasheet PDF文件第5页浏览型号TPS62021的Datasheet PDF文件第6页浏览型号TPS62021的Datasheet PDF文件第7页 
TPS62020, TPS62021  
www.ti.com  
SLVS076B–JUNE 2003–REVISED APRIL 2004  
600 mA/1.25 MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER  
FEATURES  
DESCRIPTION  
•
•
•
•
•
•
•
Up to 95% Conversion Efficiency  
The TPS62020 is a high efficiency synchronous  
step-down dc-dc converter optimized for battery pow-  
ered portable applications. This device is ideal for  
portable applications powered by a single Li-Ion  
battery cell or by 3-cell NiMH/NiCd batteries. With an  
output voltage range from 6.0 V down to 0.7 V, the  
device supports low voltage DSPs and processors in  
PDAs, pocket PCs, as well as notebooks and  
subnotebook computers. The TPS62020 operates at  
a fixed switching frequency of 1.25 MHz and enters  
the power save mode operation at light load currents  
to maintain high efficiency over the entire load current  
range. For low noise applications, the device can be  
forced into fixed frequency PWM mode by pulling the  
MODE pin high. The difference between the  
TPS62020 and the TPS62021 is the logic level of the  
MODE pin. The TPS62021 has an active-low MODE  
pin. The TPS62020 supports up to 600-mA load  
current.  
Typical Quiescent Current: 18 µA  
Load Current: 600 mA  
Operating Input Voltage Range: 2.5 V to 6.0 V  
Switching Frequency: 1.25 MHz  
Adjustable and Fixed Output Voltage  
Power Save Mode Operation at Light load  
Currents  
•
•
•
•
•
•
•
•
Active-Low MODE pin on TPS62021  
100% Duty Cycle for Lowest Dropout  
Internal Softstart  
Dynamic Output Voltage Positioning  
Thermal Shutdown  
Short-Circuit Protection  
10 Pin MSOP PowerPad™ Package  
10 Pin QFN 3 X 3 mm Package  
APPLICATIONS  
•
•
•
•
•
•
PDA, Pocket PC and Smart Phones  
USB Powered Modems  
CPUs and DSPs  
PC Cards and Notebooks  
xDSL Applications  
Standard 5-V to 3.3-V Conversion  
Typical Application Circuit (600-mA Output Current)  
EFFICIENCY  
vs  
LOAD CURRENT  
V
V
O
100  
95  
L1  
I
TPS62020  
V
= 1.8 V  
O
0.7 V to V / 600 mA  
I
10 µH  
2.5 V to 6 V  
8
7
2
3
SW  
VIN  
V = 2.7 V  
I
90  
85  
80  
75  
70  
65  
60  
55  
50  
45  
40  
SW  
FB  
VIN  
C3  
10 µF  
C4  
10 µF  
5
10  
9
1
6
R1  
EN  
V = 3.6 V  
I
C1  
PGND  
MODE  
GND  
V = 5 V  
I
4
PGND  
Mode = Low  
R2  
C2  
V = 3.6 V  
I
Mode = High  
0
0.01 0.10  
1
10  
100 1000  
I
L
− Load Current − mA  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PowerPad is a trademark of Texas Instruments.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2003–2004, Texas Instruments Incorporated  
1234567...18

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TPS62021 替代型号

型号 品牌 替代类型 描述 数据表
TPS62260 TI

功能相似

 2.25 MHz 600 mA Step Down Converter in 2x2SON/TSOT-23 Package
TPS62026 TI

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 600 mA/1.25 MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER
TPS62020 TI

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 600 mA/1.25 MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER

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