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LM2731YMFX

更新时间： 2024-10-28 12:48:31
品牌 Logo 应用领域
德州仪器 - TI 转换器开关升压转换器
页数 文件大小 规格书
16页 629K
描述
LM2731 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23

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LM2731YMFX 数据手册

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TI Confidential - NDA Restrictions  
LM2731  
www.ti.com  
SNVS217F –MAY 2004–REVISED NOVEMBER 2012  
LM2731 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23  
Check for Samples: LM2731  
1
FEATURES  
DESCRIPTION  
The LM2731 switching regulators are current-mode  
boost converters operating at fixed frequencies of 1.6  
MHz (“X” option) and 600 kHz (“Y” option).  
2
•
22V DMOS FET Switch  
•
1.6 MHz (“X”), 0.6 MHz (“Y”) Switching  
Frequency  
The use of SOT-23 package, made possible by the  
minimal power loss of the internal 1.8A switch, and  
use of small inductors and capacitors result in the  
industry's highest power density. The 22V internal  
switch makes these solutions perfect for boosting to  
voltages up to 20V.  
•
•
•
•
•
•
•
•
Low RDS(ON) DMOS FET  
Switch Current up to 1.8A  
Wide Input Voltage Range (2.7V–14V)  
Low Shutdown Current (<1 µA)  
5-Lead SOT-23 Package  
These parts have a logic-level shutdown pin that can  
be used to reduce quiescent current and extend  
battery life.  
Uses Tiny Capacitors and Inductors  
Cycle-by-Cycle Current Limiting  
Internally Compensated  
Protection is provided through cycle-by-cycle current  
limiting and thermal shutdown. Internal compensation  
simplifies design and reduces component count.  
APPLICATIONS  
•
•
•
•
•
White LED Current Source  
PDA’s and Palm-Top Computers  
Digital Cameras  
Table 1. Switch Frequency  
X
Y
1.6 MHz  
0.6 MHz  
Portable Phones and Games  
Local Boost Regulator  
Typical Application Circuit  
Efficiency vs Load Current  
D1  
L1/10mH  
100  
90  
MBR0520  
5 VIN  
5 - 12V Boost  
^ó_ ëꢀŒ•]}v  
U1  
VIN  
SW  
12V  
OUT  
500mA  
(TYP)  
R3  
51K  
R1/117K  
LM2731 —X“  
FB  
SHDN  
SHDN  
GND  
80  
70  
C1  
2.2mF  
CF  
R2  
13.3K  
C2  
220pF  
GND  
4.7mF  
0
500  
100 200 300 400  
LOAD CURRENT (mA)  
Efficiency vs Load Current  
D1  
MBR0520  
L1/6.8mH  
100  
90  
3.3 VIN  
SHDN  
3.3 -5V Boost  
^ò_ ëꢀŒ•]}v  
U1  
VIN  
SW  
5V  
OUT  
R3  
51K  
R1/40.5K  
LM2731 —Y“  
FB  
700mA  
(TYP)  
SHDN  
GND  
80  
70  
C1  
2.2mF  
CF  
470pF  
R2  
13.3K  
C2  
22mF  
GND  
0
400 600  
800  
200  
LOAD 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.  
All trademarks are the property of their respective owners.  
2
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 © 2004–2012, Texas Instruments Incorporated  
1234567...16

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LM2731YMFX 替代型号

型号 品牌 替代类型 描述 数据表
LM2731YMFX/NOPB TI

完全替代

 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23 5-SOT-23 -40 to 125
LM2731YMF TI

类似代替

 0.6/1.6-MHz Boost Converters With 22-V Internal FET Switch in SOT-23
LM2731YMF/NOPB TI

类似代替

 0.6/1.6-MHz Boost Converters With 22-V Internal FET Switch in SOT-23

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LM2733XMFX TI

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