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TPS62240_13

更新时间： 2024-01-23 13:28:00
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德州仪器 - TI 转换器
页数 文件大小 规格书
29页 1329K
描述
2.25 MHz 300 mA Step Down Converter in 2x2SON/TSOT23 Package

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TPS62240, TPS62242, TPS62243  
www.ti.com  
SLVS762B–JUNE 2007–REVISED SEPTEMBER 2007  
2.25 MHz 300 mA Step Down Converter in 2x2SON/TSOT23 Package  
1
FEATURES  
DESCRIPTION  
23  
•
High Efficiency Step Down Converter  
•
•
Output Current up to 300 mA  
The TPS62240 device is  
a
high efficiency  
synchronous step down dc-dc converter optimized for  
battery powered portable applications. It provides up  
to 300 mA output current from a single Li-Ion cell and  
is ideal to power portable applications like mobile  
phones and other portable equipment..  
VIN Range From 2 V to 6 V for Li-Ion Batteries  
With Extended Voltage Range  
•
•
•
•
•
•
•
•
2.25 MHz Fixed Frequency Operation  
Power Save Mode at Light Load Currents  
Output Voltage Accuracy in PWM Mode ±1.5%  
Adjustable Output Voltage from 0.6 V to VIN  
Typical 15 µA Quiescent Current  
With an input voltage range of 2 V to 6 V, the device  
supports applications powered by Li-Ion batteries with  
extended voltage range, two- and three-cell alkaline,  
3.3-V and 5-V input voltage rails.  
100% Duty Cycle for Lowest Dropout  
Available in a TSOT23 and 2×2×0,8 mm SON  
Allows < 1 mm Solution Height  
The TPS62240 operates at 2.25 MHz fixed switching  
frequency and enters Power Save Mode operation at  
light load currents to maintain high efficiency over the  
entire load current range.  
APPLICATIONS  
The Power Save Mode is optimized for low output  
voltage ripple. For low noise applications, the device  
can be forced into fixed frequency PWM mode by  
pulling the MODE pin high. In the shutdown mode,  
the current consumption is reduced to less than 1 µA.  
TPS62240 allows the use of small inductors and  
capacitors to achieve a small solution size.  
•
•
•
•
•
•
•
Bluetooth™ Headset  
Cell Phones, Smart-phones  
WLAN  
PDAs, Pocket PCs  
Low Power DSP Supply  
Portable Media Players  
Digital Cameras  
The TPS62240 is available in a 5-pin TSOT23 and  
6-pin 2mm×2mm SON package.  
L1  
2.2µH  
100  
TPS62243DRV  
VIN 2.0V to 6V  
V = 2 V  
I
VOUT 1.8V  
V = 2 V  
I
V = 2.7  
90  
80  
70  
VIN  
SW  
Up to 300mA  
I
V = 4.5  
I
CIN  
4.  
EN  
V = 3 V  
I
7
µF  
COUT  
10µF  
FB  
GND  
V = 3.6  
60  
50  
40  
I
MODE  
V = 4.5  
I
30  
20  
10  
0
VO = 1.8 V,  
MODE = GND,  
L = 2.2 mH,  
DCR 110 mΩ  
0.01  
0.1  
1
10  
100 1000  
I
- Output Current - mA  
O
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.  
2
3
PowerPAD is a trademark of Texas Instruments.  
Bluetooth is a trademark of Bluetooth SIG, Inc..  
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 © 2007, Texas Instruments Incorporated  
1234567...29

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