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LMR14203XMK/NOPB

更新时间： 2024-09-25 13:09:23
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LMR14203XMK/NOPB 数据手册

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LMR14203  
www.ti.com  
SNVS732C –OCTOBER 2011–REVISED APRIL 2013  
®
LMR14203 SIMPLE SWITCHER 42Vin, 0.3A Step-Down Voltage Regulator in SOT-23  
Check for Samples: LMR14203  
1
FEATURES  
DESCRIPTION  
The LMR14203 is a PWM DC/DC buck (step-down)  
regulator. With a wide input range from 4.5V-42V, it is  
suitable for a wide range of applications such as  
power conditioning from unregulated sources. They  
feature a low RDSON (0.9Ω typical) internal switch for  
maximum efficiency (85% typical). Operating  
frequency is fixed at 1.25 MHz allowing the use of  
small external components while still being able to  
have low output voltage ripple. Soft-start can be  
implemented using the shutdown pin with an external  
RC circuit allowing the user to tailor the soft-start time  
to a specific application.  
2
•
Input Voltage Range of 4.5V to 42V  
Output Voltage Range of 0.765V to 34V  
Output Current up to 0.3A  
•
•
•
•
•
•
•
•
•
1.25 MHz Switching Frequency  
Low Shutdown Iq, 16 µA Typical  
Short Circuit Protected  
Internally Compensated  
Soft-Start Function  
Thin SOT-23-6 Package (2.97 x 1.65 x 1mm)  
Fully Enabled for WEBENCH® Power Designer  
The LMR14203 is optimized for up to 300 mA load  
current.  
PERFORMANCE BENEFITS  
Additional features include: thermal shutdown, VIN  
under-voltage lockout, and gate drive under-voltage  
lockout. The LMR14203 is available in a low profile  
SOT-6L package.  
•
•
•
Tight Accuracy for Powering Digital ICs  
Extremely Easy to Use  
Tiny Overall Solution Reduces System Cost  
APPLICATIONS  
•
Point-of-Load Conversions from 5V, 12V, and  
24V Rails  
•
•
•
•
•
Space Constrained Applications  
Battery Powered Equipment  
Industrial Distributed Power Applications  
Power Meters  
Portable Hand-Held Instruments  
System Performance  
Efficiency vs Load Current  
VIN = 12V, VOUT = 1.2V and 3.3V  
Efficiency vs Load Current  
VIN = 24V, VOUT = 1.2V and 3.3V  
100  
100  
90  
80  
70  
60  
50  
40  
30  
20  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
10  
0
1.2Vout  
3.3Vout  
1.2Vout  
3.3Vout  
0.00 0.05 0.10 0.15 0.20 0.25 0.30  
LOAD CURRENT (A)  
0.00 0.05 0.10 0.15 0.20 0.25 0.30  
LOAD CURRENT (A)  
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 © 2011–2013, Texas Instruments Incorporated  
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LMR14203XMK/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LMR14203XMKX/NOPB TI

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