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TPS62561

更新时间： 2024-11-16 07:04:47
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德州仪器 - TI 转换器
页数 文件大小 规格书
29页 1245K
描述
2.25-MHz, 600-mA Step-Down Converter in TSOT and 2- × 2- × 0,8-mm SON Package

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TPS62561 数据手册

 浏览型号TPS62561的Datasheet PDF文件第2页浏览型号TPS62561的Datasheet PDF文件第3页浏览型号TPS62561的Datasheet PDF文件第4页浏览型号TPS62561的Datasheet PDF文件第5页浏览型号TPS62561的Datasheet PDF文件第6页浏览型号TPS62561的Datasheet PDF文件第7页 
TPS62560  
TPS62561, TPS62562  
www.ti.com ........................................................................................................................................... SLVS815B–JANUARY 2008–REVISED NOVEMBER 2008  
2.25-MHz, 600-mA Step-Down Converter in TSOT and 2- × 2- × 0,8-mm SON Package  
With a wide input voltage range of 2.5 V to 5.5 V, the  
devices support applications powered by Li-Ion  
1
FEATURES  
•
•
•
High-Efficiency Step-Down Converter  
batteries with extended voltage range, two- and  
three-cell alkaline batteries, 3.3-V and 5-V input  
voltage rails. They operate at 2.25-MHz fixed  
switching frequency and enter power-save mode  
operation at light load currents to maintain high  
efficiency over the entire load-current range.  
Output Current up to 600 mA  
Wide VIN Range from 2.5 V to 5.5 V for Li-Ion  
Batteries With Extended Voltage Range  
•
•
•
•
•
•
•
•
•
Adjustable and Fixed Output-Voltage Options  
2.25-MHz Fixed-Frequency Operation  
Power-Save Mode at Light Load Currents  
Output Voltage Accuracy in PWM Mode ±2.5%  
Typical 15-µA Quiescent Current  
100% Duty Cycle for Lowest Dropout  
Soft Start  
The power-save mode is optimized for low  
output-voltage ripple. For low-noise applications, the  
devices can be forced into the fixed-frequency PWM  
mode by pulling the MODE terminal high. In  
shutdown mode, the current consumption is reduced  
to less than 1 µA. Switching at 2.25-MHz allows the  
use of small inductors and capacitors to achieve a  
small solution size.  
Voltage Positioning at Light Loads  
Available in a Small TSOT, and  
2-mm × 2-mm × 0,8-mm SON Package  
Operating in a forced fixed-frequency PWM mode,  
the TPS62561 devices allow simple filtering of the  
switching frequency, e.g., for noise-sensitive  
applications.  
•
Allows < 1-mm Solution Height  
APPLICATIONS  
TPS62560 and TPS62562 are available in a 2-mm ×  
2-mm 6-terminal SON package, whereas TPS62561  
•
•
•
PDAs, Pocket PCs, Portable Media Players  
Low-Power DSP Supply  
POL Applications  
is available in  
Providing  
a
5-terminal TSOT23 package.  
a
fixed-output-voltage version, this  
TPS62562 enables a even smaller solution size with  
no external resistors needed.  
DESCRIPTION  
The TPS6256x devices are efficient synchronous  
step-down  
dc-dc  
converters  
optimized  
for  
battery-powered applications. They provide up to  
600-mA output current from a single Li-Ion cell and  
are ideal to power mobile phones and other portable  
applications.  
100  
90  
VIN = 2.7 V  
VIN = 3 V  
80  
70  
60  
50  
40  
30  
20  
VIN = 3.6 V  
VIN = 4.5 V  
L
TPS62560DRV  
V
V
= 2.5 V to 5.5 V  
IN  
Up to 600 mA  
2.2 mH  
V
IN  
SW  
OUT  
C
1
22 pF  
C
C
R
OUT  
IN  
4.7 mF  
1
EN  
10 mF  
FB  
GND  
R
2
MODE  
VOUT = 1.8 V  
MODE = GND  
L = 2.2 mH  
DCR 110 mR  
10  
0
0.01  
0.1  
1
10  
100  
1000  
IOUT – Output Current – mA  
1
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.  
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 © 2008, Texas Instruments Incorporated  
1234567...29

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