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Part No LM3151MHX-3.3/NOPB
Manufacturer Texas Instruments
Catalog PMIC - Voltage Regulators - DC DC Switching Controllers
Description LM3151/LM3152/LM3153 SIMPLE SWITCHER® CONTROLLER, High Input Voltage Synchronous Step-Down

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Pricing & Ordering $1.5302 Historical reference price : is the price that a customer announces that it is willing to pay for this component in the previous period, only for reference.
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Availability: 8,000 pieces
MOQ: 25 pcs
Order Increment : 1 pcs
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Products specifications

Categories Integrated Circuits (ICs)
Manufacturer Texas Instruments
Packaging Reel - TR
Output Type Transistor Driver
Function Step-Down
Output Configuration Positive
Topology Buck
Number of Outputs 1
Output Phases 1
Supply Voltage 6 V ~ 42 V
Frequency - Switching 250kHz
Synchronous Rectifier Yes
Clock Sync No
Control Features Enable, Soft Start
Operating Temperature Range -40°C ~ 125°C (TJ)
Package 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
Manufacturer Package 14-HTSSOP
Win Source Part Number 1198525-LM3151MHX-3.3/NOPB
Manufacturer Homepage
Popularity Medium
Fake Threat In the Open Market 66 pct.
Supply and Demand Status Limited
Family Name LM3151
Introduction Date October 17, 2008
Country of Origin Malaysia
Halogen Free Compliant
Estimated EOL Date 2028
Alternative Parts
PM6681A;  PM6681ATR;   LTC1159IS#TR; 


The LM3151MHX-3.3/NOPB is a cutting-edge integrated circuit designed by Texas Instruments, known for its reliability and efficiency in power management applications. This device is a part of the LM3151 series, which are easy-to-use, 3.3V fixed output, synchronous buck (step-down) constant-on-time (COT) regulators. The LM3151MHX-3.3/NOPB operates over an input voltage range of 6V to 42V and is capable of delivering up to 12A of continuous output current with an excellent load and line regulation.

Key Features

  • Fixed Output Voltage: This regulator provides a stable 3.3V output, making it suitable for a wide range of applications that require a regulated 3.3V supply.
  • High Efficiency: With its synchronous buck design, the LM3151MHX-3.3/NOPB achieves high conversion efficiency, which is crucial for minimizing heat generation and power loss in compact electronic systems.
  • Wide Input Voltage Range: The ability to handle input voltages from 6V to 42V allows this device to be used in various systems that experience significant voltage fluctuations, ensuring consistent performance.
  • High Output Current: Capable of delivering up to 12A, this regulator can power demanding loads, making it an excellent choice for high-performance industrial and computing applications.
  • Thermal Protection: The device includes over-temperature protection, safeguarding the regulator from potential damage due to excessive heat.
  • Adjustable Switching Frequency: Users can set the switching frequency from 200 kHz to 1 MHz, providing flexibility to optimize for efficiency or component size.


The LM3151MHX-3.3/NOPB is ideal for a variety of applications, including:

  • Telecommunications Infrastructure
  • Networking Equipment
  • Industrial Power Systems
  • Point of Load Power Conversion

Quality and Reliability

Encased in a thermally enhanced LLP-14 package, the LM3151MHX-3.3/NOPB is designed to meet the rigorous standards of Texas Instruments for durability and performance. This device is RoHS compliant and comes with the NOPB (No Lead (Pb)) designation, indicating a commitment to environmental standards and lead-free manufacturing.


In summary, the LM3151MHX-3.3/NOPB from Texas Instruments is a robust and versatile synchronous buck regulator that offers a fixed 3.3V output, high efficiency, and the ability to deliver substantial current. Its wide input voltage range and thermal protection features make it a reliable choice for a range of demanding applications.

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